Conformal metasurface-coated dielectric waveguides for highly confined broadband optical activity with simultaneous low-visibility and reduced crosstalk.,Nature Communications

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Conformal metasurface-coated dielectric waveguides for highly confined broadband optical activity with simultaneous low-visibility and reduced crosstalk.
Nature Communications ( IF 14.7 ) Pub Date : 2017-08-25 , DOI: 10.1038/s41467-017-00391-0
Zhi Hao Jiang _{1,

2} , Lei Kang ₁ , Douglas H Werner ₁

Affiliation

The ability to achieve simultaneous control over the various electromagnetic properties of dielectric waveguides, including mode confinement, polarization, scattering signature, and crosstalk, which are critical to system miniaturization, diversity in functionality, and non-invasive integration, has been a highly sought after yet elusive goal. Currently existing methods, which rely on three-dimensional artificial cores or claddings and/or structural chirality, provide efficient paths for obtaining either highly confined modes, optical activity, or a low-scattering signature, but at the expense of increased propagation loss, form factor and weight. Here, by tailoring the unique anisotropy and exploiting the inter-cell coupling of metasurface coatings, we report a unified approach for simultaneously controlling the diverse optical properties of dielectric waveguides. The experimentally demonstrated highly confined sub-wavelength dielectric waveguide with a low-visibility and broadband optical activity represents a transformative wave manipulation capability with far reaching implications, offering new pathways for future miniaturization of dielectric waveguide-based systems with simultaneous polarization and scattering control.Controlling all the optical properties of dielectric waveguides is a challenging task and often requires complicated core- and cladding designs. Here, Jiang et al. demonstrate that a thin metasurface coating can control several optical properties simultaneously over a broad frequency range.

中文翻译：

共形超表面涂层介电波导，可实现高度受限的宽带光学活动，同时具有低能见度和减少串扰。

实现同时控制介质波导的各种电磁特性（包括模式限制、偏振、散射特征和串扰）的能力一直受到高度追捧，这对于系统小型化、功能多样性和非侵入式集成至关重要却是难以实现的目标。目前现有的方法依赖于三维人造纤芯或包层和/或结构手性，为获得高度受限的模式、旋光性或低散射特征提供了有效的路径，但以增加传播损耗为代价，形成因素和权重。在这里，通过定制独特的各向异性并利用超表面涂层的单元间耦合，我们报告了一种同时控制介电波导的不同光学特性的统一方法。实验证明，高度受限的亚波长介电波导具有低可见度和宽带光学活性，代表了具有深远影响的变革性波操纵能力，为未来基于介电波导的系统的小型化提供了新的途径，同时具有偏振和散射控制。介电波导的所有光学特性是一项具有挑战性的任务，通常需要复杂的芯层和包层设计。在这里，江等人。证明薄超表面涂层可以在很宽的频率范围内同时控制多种光学特性。

更新日期：2017-08-25

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