Gigahertz Nano-Optomechanical Resonances in a Dielectric SiC-Membrane Metasurface Array,Nano Letters

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Gigahertz Nano-Optomechanical Resonances in a Dielectric SiC-Membrane Metasurface Array
Nano Letters ( IF 9.6 ) Pub Date : 2021-05-20 , DOI: 10.1021/acs.nanolett.1c00205
Idris A. Ajia ₁ , Jun-Yu Ou ₂ , Nicholas J. Dinsdale ₁ , H. Johnson Singh ₁ , Theo Chen-Sverre ₁ , Tongjun Liu ₂ , Nikolay I. Zheludev _{2,

3} , Otto L. Muskens ₁

Affiliation

Optically and vibrationally resonant nanophotonic devices are of particular importance for their ability to enhance optomechanical interactions, with applications in nanometrology, sensing, nano-optical control of light, and optomechanics. Here, the optically resonant excitation and detection of gigahertz vibrational modes are demonstrated in a nanoscale metasurface array fabricated on a suspended SiC membrane. With the design of the main optical and vibrational modes to be those of the individual metamolecules, resonant excitation and detection are achieved by making use of direct mechanisms for optomechanical coupling. Ultrafast optical pump–probe studies reveal a multimodal gigahertz vibrational response corresponding to the mechanical modes of the suspended nanoresonators. Wavelength and polarization dependent studies reveal that the excitation and detection of vibrations takes place through the metasurface optical modes. The dielectric metasurface pushes the modulation speed of optomechanical structures closer to their theoretical limits and presents a potential for compact and easily fabricable optical components for photonic applications.

中文翻译：

介电 SiC 膜超表面阵列中的千兆赫兹纳米光机械共振

光学和振动共振纳米光子器件因其增强光机械相互作用的能力而特别重要，可应用于纳米计量学、传感、光的纳米光学控制和光机械学。在这里，在悬浮的 SiC 膜上制造的纳米级超表面阵列中展示了千兆赫兹振动模式的光学共振激发和检测。通过将主要的光学和振动模式设计为单个超分子的模式，共振激发和检测是通过利用光机械耦合的直接机制来实现的。超快光泵-探针研究揭示了与悬浮纳米谐振器的机械模式相对应的多模态千兆赫兹振动响应。波长和偏振相关的研究表明，振动的激发和检测是通过超表面光学模式进行的。介电超表面将光机械结构的调制速度推向其理论极限，并为用于光子应用的紧凑且易于制造的光学组件提供了潜力。

更新日期：2021-06-09

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