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Airborne single-photon LiDAR towards a small-sized and low-power payload Optica (IF 8.4) Pub Date : 2024-04-25 Yu Hong, Shijie Liu, Zheng-Ping Li, Xin Huang, Pengyu Jiang, Yang Xu, Cheng Wu, Hao Zhou, Yu-Chen Zhang, Hai-Lun Ren, Zhao-Hui Li, Jianjun Jia, Qiang Zhang, Chunlai Li, Feihu Xu, Jian-Yu Wang, and Jian-Wei Pan
Single-photon light detection and ranging (LiDAR) has played an important role in areas ranging from target identification and 3D imaging to remote sensing. Its high sensitivity provides the feasibility of lightweight LiDAR systems for the resource-limited airborne and spaceborne platforms. Here, we design and demonstrate an airborne single-photon LiDAR towards the compact, small-sized, and low-power
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Event-based x-ray imager with ghosting-free scintillator film Optica (IF 8.4) Pub Date : 2024-04-24 Ao Zhang, Jincong Pang, Haodi Wu, Qingwen Tan, Zhiping Zheng, Ling Xu, Jiang Tang, and Guangda Niu
Dynamic x-ray imagers have undergone extensive study due to their wide-ranging applications. However, as frame rates and resolutions increase, the accompanying growth in data volume imposes constraints on system capabilities, including data transmission, temporal bandwidth, processing capability, and power consumption. Herein we present a demonstration of an event-based x-ray imager that integrates
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Orbital-angular-momentum-dependent speckles for spatial mode sorting and demultiplexing Optica (IF 8.4) Pub Date : 2024-04-22 Rui Ma, Ke Hai Luo, Sushil Pokharel, Zhao Wang, Olga Korotkova, Jing Song He, Wei Li Zhang, Dian Yuan Fan, Anderson S. L. Gomes, and Jun Liu
Characterizing the orbital-angular-momentum (OAM) modes is critically important for OAM-encoded data transfer. However, traditional characterizing approaches rely on either complex and precise experimental configurations or complicated prior information processing. In these scenarios, the correlation features of OAM-dependent speckles from the scattering effect have received little attention. Here
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High-energy, frequency-doubled thulium-doped fiber chirped-pulse amplification system at 950 nm Optica (IF 8.4) Pub Date : 2024-04-17 Shutao Xu, Timothy Lim, Ahmet Turnali, and Michelle Y. Sander
Compact, high-energy ultrafast sources at less exploited fiber gain wavelengths can enable various applications. Here, a high pulse-energy (138 nJ) femtosecond (390 fs) laser source with a center wavelength around 950 nm is demonstrated by frequency-doubling of ultrafast pulses from a thulium-doped fiber chirped-pulse amplification system. The thulium-doped fiber system generates an average output
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Silicon photonic neuromorphic accelerator using integrated coherent transmit-receive optical sub-assemblies Optica (IF 8.4) Pub Date : 2024-04-19 Ying Zhu, Ming Luo, Xin Hua, Lu Xu, Ming Lei, Min Liu, Jia Liu, Ye Liu, Qiansheng Wang, Chao Yang, Daigao Chen, Lei Wang, and Xi Xiao
Neural networks, having achieved breakthroughs in many applications, require extensive convolutions and matrix-vector multiplication operations. To accelerate these operations, benefiting from power efficiency, low latency, large bandwidth, massive parallelism, and CMOS compatibility, silicon photonic neural networks have been proposed as a promising solution. In this study, we propose a scalable architecture
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Depth-dependent scaling of axial distances in light microscopy Optica (IF 8.4) Pub Date : 2024-04-19 S. V. Loginov, D. B. Boltje, M. N. F. Hensgens, J. P. Hoogenboom, and E. B. van der Wee
In volume fluorescence microscopy, refractive index matching is essential to minimize aberrations. There are, however, common imaging scenarios where a refractive index mismatch (RIM) between immersion and a sample medium cannot be avoided. This RIM leads to an axial deformation in the acquired image data. Over the years, different axial scaling factors have been proposed to correct for this deformation
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Realization of an integrated coherent photonic platform for scalable matrix operations Optica (IF 8.4) Pub Date : 2024-04-18 Sadra Rahimi Kari, Nicholas A. Nobile, Dominique Pantin, Vivswan Shah, and Nathan Youngblood
Optical processing of information holds great promise for addressing many challenges facing the field of computing. However, integrated photonic processors are typically limited by the physical size of the processing units and the energy consumption of high-speed analog-to-digital conversion. In this paper, we demonstrate an integrated, coherent approach to processing temporally multiplexed optical
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Detecting single nanoparticles using fiber-tip nanophotonics Optica (IF 8.4) Pub Date : 2024-04-16 Arthur L. Hendriks, Daan Rabelink, Mathias Dolci, Paco Dreverman, Mildred S. Cano-Velázquez, Luca Picelli, René P. J. van Veldhoven, Peter Zijlstra, Ewold Verhagen, and Andrea Fiore
Sensing nano-objects, from nanoparticles to molecules, has become a crucial need in environmental monitoring, medical diagnostics, and drug development. Detection of single particles and molecules is highly desirable, as it provides specific information on size, dynamics, and interactions. Current nanophotonic implementations rely on complex optical readout schemes, limiting their application in the
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Year-long optical time scale with sub-nanosecond capabilities Optica (IF 8.4) Pub Date : 2024-04-17 Valerio Formichella, Giovanna Signorile, Tung Thanh Thai, Lorenzo Galleani, Marco Pizzocaro, Irene Goti, Stefano Condio, Cecilia Clivati, Matias Risaro, Filippo Levi, Davide Calonico, and Ilaria Sesia
An atomic time scale is a method for marking events and the passage of time by using atomic frequency standards. Thanks to the superior performance of atomic clocks based on optical transitions, time scales generated with optical clocks have the potential to be more accurate and stable than those based on microwave clocks. In this work, we demonstrate an experimental optical time scale based on the
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Energy-flow-reversing dynamics in vortex beams: OAM-independent propagation and enhanced resilience Optica (IF 8.4) Pub Date : 2024-04-18 Wenxiang Yan, Yuan Gao, Zheng Yuan, Xian Long, Zhaozhong Chen, Zhi-Cheng Ren, Xi-Lin Wang, Jianping Ding, and Hui-Tian Wang
Since their discovery in the 1990s, vortex beams, known for their ability to carry orbital angular momentum (OAM), have found substantial applications in optical manipulation and high-dimensional classical and quantum information communication. However, their inherent diffraction in free space, resulting in OAM-dependent beam expansion, has constrained their utility in spatial mode multiplexing communication
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Metasurface-enabled barcoding for compact flow cytometry Optica (IF 8.4) Pub Date : 2024-04-19 Tao Hong, Deyu Li, and Jason G. Valentine
Flow cytometers are a vital tool for cellular phenotyping but are primarily limited to centralized laboratories due to their bulkiness and cost. Significant efforts have been made to construct on-chip flow cytometers for point-of-care applications, and a promising approach is filter-on-chip flow cytometers utilizing the conventional Bayer RGB filter on imaging cameras to miniaturize key optoelectronic
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T staging esophageal tumors with x rays Optica (IF 8.4) Pub Date : 2024-04-19 T. Partridge, P. Wolfson, J. Jiang, L. Massimi, A. Astolfo, N. Djurabekova, S. Savvidis, C. J. Maughan Jones, C. K. Hagen, E. Millard, W. Shorrock, R. M. Waltham, I. G. Haig, D. Bate, K. M. A. Ho, H. Mc Bain, A. Wilson, A. Hogan, H. Delaney, A. Liyadipita, A. P. Levine, K. Dawas, B. Mohammadi, Y. A. Qureshi, M. D. Chouhan, S. A. Taylor, M. Mughal, P. R. T. Munro, M. Endrizzi, M. Novelli, et al.
With histopathology results typically taking several days, the ability to stage tumors during interventions could provide a step change in various cancer interventions. X-ray technology has advanced significantly in recent years with the introduction of phase-based imaging methods. These have been adapted for use in standard labs rather than specialized facilities such as synchrotrons, and approaches
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Demonstration of high-power photonic-crystal surface-emitting lasers with 1-kHz-class intrinsic linewidths: erratum Optica (IF 8.4) Pub Date : 2024-04-18 Ryohei Morita, Takuya Inoue, Masahiro Yoshida, Kentaro Enoki, Menaka De Zoysa, Kenji Ishizaki, and Susumu Noda
An erratum is given to correct two typographical errors in Optica 11, 333 (2024) [CrossRef] . The corrections do not impact the results and conclusions of the original paper.
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Experimental post-selection loophole-free time-bin and energy-time nonlocality with integrated photonics Optica (IF 8.4) Pub Date : 2024-04-12 Francesco B. L. Santagiustina, Costantino Agnesi, Alvaro Alarcón, Adán Cabello, Guilherme B. Xavier, Paolo Villoresi, and Giuseppe Vallone
Time-bin (TB) and energy-time (ET) entanglements are crucial resources for long-distance quantum information processing. However, their standard implementations suffer from the so-called post-selection loophole that allows for classical simulation and thus prevents quantum advantage. The post-selection loophole has been addressed in proof-of-principle experiments. An open problem though is to close
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Ultralow noise microwave synthesis via difference frequency division of a Brillouin resonator Optica (IF 8.4) Pub Date : 2024-04-08 William Loh, Dodd Gray, Reed Irion, Owen May, Connor Belanger, Jason Plant, Paul W. Juodawlkis, and Siva Yegnanarayanan
Low phase noise microwave oscillators are at the center of a multitude of applications that span the gamut of photonics and electronics. Within this space, optically derived approaches to microwave frequency synthesis are particularly compelling owing to their unique combination of ultrawideband frequency access and the potential for resiliency to temperature and environmental perturbation via common-mode
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Exceptional refrigeration of motions beyond their mass and temperature limitations Optica (IF 8.4) Pub Date : 2024-04-08 Deng-Gao Lai, C.-H. Wang, B.-P. Hou, Adam Miranowicz, and Franco Nori
Coaxing vibrations in the regimes of both large mass and high temperature into their motional quantum ground states is extremely challenging, because it requires an ultra-high optical power, which introduces extraneous excessive heating and intricate instabilities. Here we propose how to overcome these obstacles and cool vibrational networks by simply harnessing the power of an exceptional point (EP)
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Transport-of-intensity model for single-mask x-ray differential phase contrast imaging Optica (IF 8.4) Pub Date : 2024-04-05 Jingcheng Yuan and Mini Das
X-ray phase contrast imaging holds great promise for improving the visibility of light-element materials such as soft tissues and tumors. The single-mask differential phase contrast imaging method stands out as a simple and effective approach to yield differential phase contrast. In this work, we introduce a model for a single-mask phase imaging system based on the transport-of-intensity equation.
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Broadband near-ultraviolet dual comb spectroscopy Optica (IF 8.4) Pub Date : 2024-04-02 Lukas Fürst, Adrian Kirchner, Alexander Eber, Florian Siegrist, Robert di Vora, and Birgitta Bernhardt
The highly energetic photons of ultraviolet light drive electronic and rovibronic transitions in all molecular species. This radiation is thus a prime tool for strongly selective spectroscopic fingerprinting and real-time environmental monitoring if broad spectral coverage, short acquisition times, and high spectral resolution are achieved–requirements that are in mutual competition in traditional
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Stimulated emission does not radiate in a pure dipole pattern Optica (IF 8.4) Pub Date : 2024-03-29 Andrew E. S. Barentine and W. E. Moerner
Stimulated emission (StE) remains relatively unused as an image-forming signal despite having potential advantages over fluorescence in speed, coherence, and ultimately resolution. Several ideas for the radiation pattern and directionality of StE remain prevalent, namely, whether a single molecule would radiate StE itself in a pure dipole pattern, or whether its emission direction depends on the driving
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Dual-comb spectroscopy in the deep ultraviolet Optica (IF 8.4) Pub Date : 2024-03-28 John J. McCauley, Mark C. Phillips, Reagan R. D. Weeks, Yu Zhang, Sivanandan S. Harilal, and R. Jason Jones
This Letter reports dual-frequency-comb spectroscopy in the deep ultraviolet used to characterize transient laser-produced plasmas. Dual-comb spectroscopy at these wavelengths enables access to a large number of strong electronic transitions in neutral and ionized atoms and molecules. This broadband dual-frequency-comb system at 265 nm measures multiple transitions in neutral and singly ionized iron
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High-efficiency high-numerical-aperture metalens designed by maximizing the efficiency limit Optica (IF 8.4) Pub Date : 2024-03-28 Shiyu Li, Ho-Chun Lin, and Chia Wei Hsu
Theoretical bounds are commonly used to assess the limitations of photonic design. Here we introduce a more active way to use theoretical bounds, integrating them into part of the design process and identifying optimal system parameters that maximize the efficiency limit itself. As an example, we consider wide-field-of-view high-numerical-aperture metalenses, which can be used for high-resolution imaging
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Ultra-intense femtosecond laser interactions with aligned nanostructures Optica (IF 8.4) Pub Date : 2024-03-20 Jorge J. Rocca, Maria G. Capeluto, Reed C. Hollinger, Shoujun Wang, Yong Wang, G. Ravindra Kumar, Amit D. Lad, Alexander Pukhov, and Vyacheslav N. Shlyaptsev
The interaction of ultrafast laser pulses of relativistic intensity with high aspect ratio nanostructures can efficiently and volumetrically heat matter to an ultra-high-energy-density regime encountered in the center of stars and within the core of fusion capsules compressed by the world’s largest lasers. It also generates gigantic quasi-static electromagnetic fields that accelerate particles to very
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High-resolution ptychographic imaging at a seeded free-electron laser source using OAM beams Optica (IF 8.4) Pub Date : 2024-03-18 Matteo Pancaldi, Francesco Guzzi, Charles S. Bevis, Michele Manfredda, Jonathan Barolak, Stefano Bonetti, Iuliia Bykova, Dario De Angelis, Giovanni De Ninno, Mauro Fanciulli, Luka Novinec, Emanuele Pedersoli, Arun Ravindran, Benedikt Rösner, Christian David, Thierry Ruchon, Alberto Simoncig, Marco Zangrando, Daniel E. Adams, Paolo Vavassori, Maurizio Sacchi, George Kourousias, Giulia F. Mancini, and
Electromagnetic waves possessing orbital angular momentum (OAM) are powerful tools for applications in optical communications, quantum technologies, and optical tweezers. Recently, they have attracted growing interest since they can be harnessed to detect peculiar helical dichroic effects in chiral molecular media and in magnetic nanostructures. In this work, we perform single-shot per position ptychography
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Sculpting harmonic comb states in terahertz quantum cascade lasers by controlled engineering Optica (IF 8.4) Pub Date : 2024-03-18 Elisa Riccardi, M. Alejandro Justo Guerrero, Valentino Pistore, Lukas Seitner, Christian Jirauschek, Lianhe Li, A. Giles Davies, Edmund H. Linfield, and Miriam S. Vitiello
Optical frequency combs (OFCs), which establish a rigid phase-coherent link between the microwave and optical domains of the electromagnetic spectrum, are emerging as key high-precision tools for the development of quantum technology platforms. These include potential applications for communication, computation, information, sensing, and metrology and can extend from the near-infrared with micro-resonator
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Scalable machine learning-assisted clear-box characterization for optimally controlled photonic circuits Optica (IF 8.4) Pub Date : 2024-03-19 Andreas Fyrillas, Olivier Faure, Nicolas Maring, Jean Senellart, and Nadia Belabas
Photonic integrated circuits offer a compact and stable platform for generating, manipulating, and detecting light. They are instrumental for classical and quantum applications. Imperfections stemming from fabrication constraints, tolerances, and operation wavelength impose limitations on the accuracy and thus utility of current photonic integrated devices. Mitigating these imperfections typically
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Self-injection-locked optical parametric oscillator based on microcombs Optica (IF 8.4) Pub Date : 2024-03-18 Fuchuan Lei, Yi Sun, Óskar B. Helgason, Zhichao Ye, Yan Gao, Magnus Karlsson, Peter A. Andrekson, and Victor Torres-Company
Narrow-linewidth yet tunable laser oscillators are one of the most important tools for precision metrology, optical atomic clocks, sensing, and quantum computing. Commonly used tunable coherent oscillators are based on stimulated emission or stimulated Brillouin scattering; as a result, the operating wavelength band is limited by the gain media. Based on nonlinear optical gain, optical parametric oscillators
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Miniaturized computational spectrometer based on two-photon absorption Optica (IF 8.4) Pub Date : 2024-03-15 Yaotian Zhao, Xuhan Guo, Jinlong Xiang, Zhenyu Zhao, Yujia Zhang, Xi Xiao, Jia Liu, Daigao Chen, and Yikai Su
On-chip spectrometers hold significant promise in the development of laboratory-on-a-chip applications. However, the spectrometers usually require extra on-chip or off-chip photodetectors (PDs) to sense optical signals, resulting in increased footprints and costs. In this paper, we address this issue by proposing a fully on-chip spectrometer based on two-photon absorption (TPA) in a simple micro-ring
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Low-power, agile electro-optic frequency comb spectrometer for integrated sensors Optica (IF 8.4) Pub Date : 2024-03-11 Kyunghun Han, David A. Long, Sean M. Bresler, Junyeob Song, Yiliang Bao, Benjamin J. Reschovsky, Kartik Srinivasan, Jason J. Gorman, Vladimir A. Aksyuk, and Thomas W. LeBrun
Sensing platforms based upon photonic integrated circuits have shown considerable promise; however, they require corresponding advancements in integrated optical readout technologies. Here, we present an on-chip spectrometer that leverages an integrated thin-film lithium niobate modulator to produce a frequency-agile electro-optic frequency comb for interrogating chip-scale temperature and acceleration
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Overcoming the diffraction limit by exploiting unmeasured scattering media Optica (IF 8.4) Pub Date : 2024-03-08 Shuai Sun, Zhen-Wu Nie, Long-Kun Du, Chen Chang, and Wei-Tao Liu
Scattering is not necessarily an obstacle to imaging. It can help enhance imaging performance beyond the reach of a lens system. However, current scattering-enhanced imaging systems require prior knowledge of the transmission matrix. There are also some techniques that do not require such prior knowledge to see through strongly scattering media, but the results are still limited by the optics used
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Ultra-broadband magneto-optical isolators and circulators on a silicon nitride photonics platform Optica (IF 8.4) Pub Date : 2024-03-08 Wei Yan, Zixuan Wei, Yucong Yang, Di Wu, Zijian Zhang, Xiaoyi Song, Jun Qin, and Lei Bi
Broadband optical isolators and circulators are highly desirable for wavelength-division multiplexing, light detection, and ranging systems. However, the silicon-integrated optical isolators and circulators reported so far have a limited isolation bandwidth of only several nanometers, due to waveguide and material dispersion. In this paper, we report the development of broadband magneto-optical isolators
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In situ tuning of optomechanical crystals with nano-oxidation Optica (IF 8.4) Pub Date : 2024-03-08 Utku Hatipoglu, Sameer Sonar, David P. Lake, Srujan Meesala, and Oskar Painter
Optomechanical crystals are a promising device platform for quantum transduction and sensing. Precise targeting of the optical and acoustic resonance frequencies of these devices is crucial for future advances on these fronts. However, fabrication disorder in these wavelength-scale nanoscale devices typically leads to inhomogeneous resonance frequencies. Here we achieve in situ, selective frequency
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Quartz as an accurate high-field low-cost THz helicity detector Optica (IF 8.4) Pub Date : 2024-03-08 Maximilian Frenzel, Joanna M. Urban, Leona Nest, Tobias Kampfrath, Michael S. Spencer, and Sebastian F. Maehrlein
Emerging concepts employing angular momentum of THz light for ultrafast material control rely on the measurement of undistorted intense THz fields and on the precise knowledge about sophisticated THz helicity states. Here, we establish z-cut \alpha -quartz as a precise electro-optic THz detector for full amplitude, phase, and polarization measurement of highly intense THz fields, all at a fraction
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Phase noise matching in resonant metasurfaces for intrinsic sensing stability Optica (IF 8.4) Pub Date : 2024-03-08 Isabel Barth, Donato Conteduca, Pin Dong, Jasmine Wragg, Pankaj K. Sahoo, Guilherme S. Arruda, Emiliano R. Martins, and Thomas F. Krauss
Interferometry offers a precise means of interrogating resonances in dielectric and plasmonic metasurfaces, surpassing spectrometer-imposed resolution limits. However, interferometry implementations often face complexity or instability issues due to heightened sensitivity. Here, we address the necessity for noise compensation and tolerance by harnessing the inherent capabilities of photonic resonances
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Optical shift spectroscopy in two-dimensional materials Optica (IF 8.4) Pub Date : 2024-03-08 Mingjie Zha, Xiaofeng Li, Enze Xu, Xiao-Qing Yan, Xinxing Zhou, Hui Jing, Le-Man Kuang, Jian-Guo Tian, and Zhi-Bo Liu
Optical beam shifts, such as the Goos–Hänchen (GH) shift and the Imbert–Fedorov (IF) shift, are fundamental optical phenomena. However, because these shifts are so minute, direct measurement is challenging, and obtaining an optical shift spectrum is even more difficult. Here, we successfully obtained GH and IF shift spectra using a beam displacement amplification technique. The optical shift spectrum
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Large reconfigurable quantum circuits with SPAD arrays and multimode fibers Optica (IF 8.4) Pub Date : 2024-02-28 Adrian Makowski, Michał Dąbrowski, Ivan Michel Antolovic, Claudio Bruschini, Hugo Defienne, Edoardo Charbon, Radek Lapkiewicz, and Sylvain Gigan
Reprogrammable integrated optics provides a natural platform for tunable quantum photonic circuits, but faces challenges when high dimensions and high connectivity are involved. Here, we implement high-dimensional linear transformations on spatial modes of photons using wavefront shaping together with mode mixing in a multimode fiber, and measure photon correlations using a time-tagging single-photon
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Demonstration of high-power photonic-crystal surface-emitting lasers with 1-kHz-class intrinsic linewidths Optica (IF 8.4) Pub Date : 2024-02-26 Ryohei Morita, Takuya Inoue, Masahiro Yoshida, Kentaro Enoki, Menaka De Zoysa, Kenji Ishizaki, and Susumu Noda
Photonic-crystal surface-emitting lasers (PCSELs) are capable of single-mode, high-power lasing over a large resonator area owing to two-dimensional resonance at a singularity point of the photonic band structure. Since the number of photons in the lasing mode in PCSELs are much larger than those in conventional semiconductor lasers, PCSELs are in principle suitable for coherent operation with a narrow
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MEMS-integrated metasurfaces for dynamic linear polarizers Optica (IF 8.4) Pub Date : 2024-02-23 Yadong Deng, Chao Meng, Paul C. V. Thrane, Sören im Sande, Sergey I. Bozhevolnyi, and Fei Ding
Optical metasurfaces (OMSs), planar arrays of meticulously designed meta-atoms, are renowned for remarkable capabilities in manipulating the polarization state of light at subwavelength scales. Nevertheless, most OMS-empowered polarization optics remain static, featuring well-defined optical responses determined by their configurations set during fabrication. Here, we demonstrate a MEMS-OMS-based dynamic
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Single-peak and narrow-band mid-infrared thermal emitters driven by mirror-coupled plasmonic quasi-BIC metasurfaces Optica (IF 8.4) Pub Date : 2024-02-22 Sen Yang, Mingze He, Chuchuan Hong, Josh Nordlander, Jon-Paul Maria, Joshua D. Caldwell, and Justus C. Ndukaife
Wavelength-selective thermal emitters (WS-EMs) hold considerable appeal due to the scarcity of cost-effective, narrow-band sources in the mid-to-long-wave infrared spectrum. WS-EMs achieved via dielectric materials typically exhibit thermal emission peaks with high quality factors ({Q} factors), but their optical responses are prone to temperature fluctuations. Metallic EMs, on the other hand, show
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Efficient parametric down-conversion by gain-trapped solitons Optica (IF 8.4) Pub Date : 2024-02-22 Marin Hamrouni, Marc Jankowski, Alexander Y. Hwang, Nayara Jornod, Jatadhari Mishra, Hubert S. Stokowski, Timothy P. McKenna, Carsten Langrock, Thomas Südmeyer, Amir Safavi-Naeini, and Martin M. Fejer
Optical parametric amplification is one of the most flexible approaches for generating coherent light at long wavelengths, but typical implementations require prohibitively large pump pulse energies to realize useful amounts of gain. In this work, we experimentally demonstrate an approach to optical parametric amplification in which an interplay between parametric gain and symmetric temporal walk-off
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Multiplexed wavefront sensing with a thin diffuser Optica (IF 8.4) Pub Date : 2024-02-16 Tengfei Wu, Marc Guillon, Gilles Tessier, and Pascal Berto
In astronomy or biological imaging, refractive index inhomogeneities of, e.g., atmosphere or tissues, induce optical aberrations that degrade the desired information hidden behind the medium. A standard approach consists of measuring these aberrations with a wavefront sensor (e.g., Shack–Hartmann) located in the pupil plane, and compensating for them either digitally or by adaptive optics with a wavefront
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Ground observations of a space laser for the assessment of its in-orbit performance Optica (IF 8.4) Pub Date : 2024-02-13 The Pierre Auger Collaboration, Oliver Lux, Isabell Krisch, Oliver Reitebuch, Dorit Huber, Denny Wernham, and Tommaso Parrinello
The wind mission Aeolus of the European Space Agency was a groundbreaking achievement for Earth observation. Between 2018 and 2023, the space-borne lidar instrument ALADIN onboard the Aeolus satellite measured atmospheric wind profiles with global coverage, which contributed to improving the accuracy of numerical weather prediction. The precision of the wind observations, however, declined over the
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Ground observations of a space laser for the assessment of its in-orbit performance Optica (IF 8.4) Pub Date : 2024-02-15 The Pierre Auger Collaboration, Oliver Lux, Isabell Krisch, Oliver Reitebuch, Dorit Huber, Denny Wernham, and Tommaso Parrinello
The wind mission Aeolus of the European Space Agency was a groundbreaking achievement for Earth observation. Between 2018 and 2023, the space-borne lidar instrument ALADIN onboard the Aeolus satellite measured atmospheric wind profiles with global coverage, which contributed to improving the accuracy of numerical weather prediction. The precision of the wind observations, however, declined over the
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Ultraviolet pulse compression via cross-phase modulation in a hollow-core fiber Optica (IF 8.4) Pub Date : 2024-02-13 Yujiao Jiang, John Pascal Messerschmidt, Fabian Scheiba, Igor Tyulnev, Lu Wang, Zhiyi Wei, and Giulio Maria Rossi
The generation of few-femtosecond pulses with high energy and tunable spectrum in the ultraviolet region is an ongoing challenge in ultrafast optics. Harnessing the cross-phase modulation between an intense near-infrared pulse and its third-harmonic, co-propagating in a gas-filled hollow-core fiber, we demonstrate spectral tuning, broadening, and temporal compression in the ultraviolet range. Ultraviolet
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Transverse mode control in quantum enhanced interferometers: a review and recommendations for a new generation Optica (IF 8.4) Pub Date : 2024-02-13 Aaron W. Goodwin-Jones, Ricardo Cabrita, Mikhail Korobko, Martin Van Beuzekom, Daniel D. Brown, Viviana Fafone, Joris Van Heijningen, Alessio Rocchi, Mitchell G. Schiworski, and Matteo Tacca
Adaptive optics has made significant advancement over the past decade, becoming the essential technology in a wide variety of applications, particularly in the realm of quantum optics. One key area of impact is gravitational-wave detection, where quantum correlations are distributed over kilometer-long distances by beams with hundreds of kilowatts of optical power. Decades of development were required
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How many supercells are required for unconventional light confinement in moiré photonic lattices? Optica (IF 8.4) Pub Date : 2024-02-08 Chirine Saadi, Hai Son Nguyen, Sébastien Cueff, Lydie Ferrier, Xavier Letartre, and Ségolène Callard
Moiré structures are receiving increasing attention in nanophotonics as they support intriguing optical phenomena. In the so-called “magic configuration,” one-dimensional moirés give rise to fully dispersionless energy bands known as “flatbands,” where the light is tightly localized within each supercell of the periodic moiré. The goal of this investigation is to determine to what extent the confinement
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Spiral diopter: freeform lenses with enhanced multifocal behavior Optica (IF 8.4) Pub Date : 2024-02-08 Laurent Galinier, Philippe Renaud-Goud, Jean Brusau, Lucien Kergadallan, Jean Augereau, and Bertrand Simon
Lens design is of paramount importance in the evolving world of technology, where compactness and high optical performance are a necessity, ranging from smartphones and wearable devices to vehicles and virtual reality. Freeform design techniques allow us to transcend traditional limitations, but creating new optics remains a substantial challenge unless we consider unconventional physical phenomena
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Optimum design of aspect ratio limited x-ray zone plates Optica (IF 8.4) Pub Date : 2024-02-08 Cameron M. Kewish, Sergey Gorelick, David M. Paganin, and Martin D. de Jonge
Fresnel zone plates are widely used for nanofocusing in x-ray microscopy. The focusing performance is described in terms of the resolution, related to the width of the smallest outermost zones, and the efficiency, governed by the thickness of the zones and therefore the amount of phase shift imparted onto the x-ray beam. The ratio of zone thickness to width, or “aspect ratio,” is limited in all methods
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Scaled local gate controller for optically addressed qubits Optica (IF 8.4) Pub Date : 2024-02-07 Bichen Zhang, Pai Peng, Aditya Paul, and Jeff D. Thompson
Scalable classical controllers are a key component of future fault-tolerant quantum computers. Neutral atom quantum computers leverage commercially available optoelectronic devices for generating large-scale tweezer arrays and performing parallel readout, but implementing massively parallel, locally addressed gate operations is an open challenge. In this work, we demonstrate an optical modulator system
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Coherent x-ray magnetic imaging with 5 nm resolution Optica (IF 8.4) Pub Date : 2024-02-07 Riccardo Battistelli, Daniel Metternich, Michael Schneider, Lisa-Marie Kern, Kai Litzius, Josefin Fuchs, Christopher Klose, Kathinka Gerlinger, Kai Bagschik, Christian M. Günther, Dieter Engel, Claus Ropers, Stefan Eisebitt, Bastian Pfau, Felix Büttner, and Sergey Zayko
Soft x-ray microscopy plays an important role in modern spintronics. However, the achievable resolution of most x-ray magnetic imaging experiments limits access to fundamental and technologically relevant length scales in the sub-10 nm regime. Here, we demonstrate x-ray magnetic microscopy with 5 nm resolution by combining holography-assisted coherent diffractive imaging with heterodyne amplification
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Supercharged two-dimensional tweezer array with more than 1000 atomic qubits Optica (IF 8.4) Pub Date : 2024-02-07 Lars Pause, Lukas Sturm, Marcel Mittenbühler, Stephan Amann, Tilman Preuschoff, Dominik Schäffner, Malte Schlosser, and Gerhard Birkl
We report on the realization of a large-scale quantum-processing architecture surpassing the tier of 1000 atomic qubits. By tiling multiple microlens-generated tweezer arrays, each operated by an independent laser source, we can eliminate laser-power limitations in the number of allocatable qubits. Already with two separate arrays, we implement combined 2D configurations of 3000 qubit sites with a
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Acoustic-feedback wavefront-adapted photoacoustic microscopy Optica (IF 8.4) Pub Date : 2024-02-05 Yuecheng Shen, Jun Ma, Chengtian Hou, Jiayu Zhao, Yan Liu, Hsun-Chia Hsu, Terence T. W. Wong, Bai-Ou Guan, Shian Zhang, and Lihong V. Wang
Optical microscopy is indispensable to biomedical research and clinical investigations. As all molecules absorb light, optical-resolution photoacoustic microscopy (PAM) is an important tool to image molecules at high resolution without labeling. However, due to tissue-induced optical aberration, the imaging quality degrades with increasing imaging depth. To mitigate this effect, we develop an imaging
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Hard x-ray grazing-incidence ptychography: large field-of-view nanostructure imaging with ultra-high surface sensitivity Optica (IF 8.4) Pub Date : 2024-02-01 P. S. Jørgensen, L. Besley, A. M. Slyamov, A. Diaz, M. Guizar-Sicairos, M. Odstrčil, M. Holler, C. Silvestre, B. Chang, C. Detlefs, and J. W. Andreasen
The morphology and distribution of nanoscale structures, such as catalytic active nanoparticles and quantum dots on surfaces, have a significant impact on their function. Thus, the capability of monitoring these properties during manufacturing and operation is crucial for the development of devices that rely on such materials. We demonstrate a technique that allows highly surface-sensitive imaging
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Generation and applications of spectral-spatially correlated principal mode in multimode fibers Optica (IF 8.4) Pub Date : 2024-02-01 Han Gao, Haifeng Hu, and Qiwen Zhan
Light propagating through multimode fibers experiences multiple scattering, leading to complex speckle output patterns and significant dispersion. In this work, we propose a unique light state called the spectral-spatially correlated principal mode (S2 principal mode) in multimode fibers. This mode demonstrates an ability to simultaneously manipulate the spectral correlation and spatial distribution
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Micro-opto-mechanical glass interferometer for megahertz modulation of optical signals Optica (IF 8.4) Pub Date : 2024-01-31 Roberto Memeo, Andrea Crespi, and Roberto Osellame
Waveguide-based interferometric circuits are widely employed in optical communications, sensing, and computing applications. In particular, glass-based devices are appealing due to the transparency and bio-compatibility of this substrate, or where low-loss interfacing with fiber networks is required. However, fast electro-optic phase modulation is hard to achieve in glass materials. Here, we demonstrate
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Distinguishing under- and over-coupled resonances without prior knowledge Optica (IF 8.4) Pub Date : 2024-01-31 Chaohan Cui, Liang Zhang, Bo-Han Wu, Shuai Liu, Pao-Kang Chen, and Linran Fan
We show that it is unreliable to determine the coupling condition of optical resonances by analyzing the extinction ratio change with wavelengths. We propose and demonstrate the unambiguous discrimination between under- and over-coupled resonances using binary phase modulation in power transmission measurement.
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Integrated-waveguide-based acousto-optic modulation with complete optical conversion Optica (IF 8.4) Pub Date : 2024-01-31 Liang Zhang, Chaohan Cui, Pao-Kang Chen, and Linran Fan
Acousto-optic modulation in piezoelectric materials offers the efficient method to bridge electrical and optical signals. It is widely used to control optical frequencies and intensities in modern optical systems including Q -switch lasers, ion traps, and optical tweezers. It is also critical for emerging applications such as quantum photonics and non-reciprocal optics. Acousto-optic devices have recently
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Compact, efficient, and scalable nanobeam core for photonic matrix-vector multiplication Optica (IF 8.4) Pub Date : 2024-01-31 Jiahui Zhang, Bo Wu, Junwei Cheng, Jianji Dong, and Xinliang Zhang
Optical neural networks have emerged as a promising avenue for implementing artificial intelligence applications, with matrix computations being a crucial component. However, the existing implementations based on microring resonators (MRRs) face bottlenecks in integration, power efficiency, and scalability, hindering the practical applications of wavelength division multiplexing (WDM)-based matrix-vector
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High-harmonic generation with a twist: all-optical characterization of magic-angle twisted bilayer graphene Optica (IF 8.4) Pub Date : 2024-01-30 Eduardo B. Molinero, Anushree Datta, M. J. Calderón, E. Bascones, and Rui E. F. Silva
If we stack up two layers of graphene while changing their respective orientation by some twisting angle, we end up with a strikingly different system when compared to single-layer graphene. For a very specific value of this twist angle, known as magic angle, twisted bilayer graphene displays a unique phase diagram that cannot be found in other systems. Recently, high-harmonic generation spectroscopy
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Ultra-sensitive separation estimation of optical sources Optica (IF 8.4) Pub Date : 2024-01-26 Clémentine Rouvière, David Barral, Antonin Grateau, Ilya Karuseichyk, Giacomo Sorelli, Mattia Walschaers, and Nicolas Treps
Historically, the resolution of optical imaging systems was dictated by diffraction, and the Rayleigh criterion was long considered an unsurpassable limit. In superresolution microscopy, this limit is overcome by manipulating the emission properties of the object. However, in passive imaging, when sources are uncontrolled, reaching sub-Rayleigh resolution remains a challenge. Here, we implement a
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Label-free multimodal polarization-sensitive optical microscope for multiparametric quantitative characterization of collagen Optica (IF 8.4) Pub Date : 2024-01-25 Lingxiao Yang, Rishyashring R. Iyer, Janet E. Sorrells, Eric J. Chaney, and Stephen A. Boppart
Collagen is an essential component of biological tissues with a variety of subtypes. To be able to capture these subtypes, fully exploit the polarization-sensitive light-collagen interactions, and provide comprehensive information of collagen, we integrated polarization-sensitive second-harmonic generation (PSHG) microscopy, polarization-sensitive optical coherence microscopy (PSOCM), and two-photon