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Ultra-High-Efficiency Anomalous Refraction with Dielectric Metasurfaces
ACS Photonics ( IF 7 ) Pub Date : 2018-03-15 00:00:00 , DOI: 10.1021/acsphotonics.8b00183
David Sell 1 , Jianji Yang 2 , Evan W. Wang 2 , Thaibao Phan 2 , Sage Doshay 1 , Jonathan A. Fan 2
Affiliation  

Anomalous refraction is a form of extreme waveform manipulation that can be realized with artificially structured nanomaterials, such as metamaterials or metasurfaces. While this phenomenon has been previously demonstrated for select input and output angles, its generalization to arbitrary angles with high efficiencies remains a challenge. In this study, we show that periodic dielectric metasurfaces can support ultra-high-efficiency anomalous refraction for nearly arbitrary combinations of incident and outgoing angles (>90% efficiency for angles up to 50°). Both polarization-dependent and polarization-independent device configurations can be realized, and the achieved metrics exceed the capabilities of conventional metasurfaces by a large margin. Many of the devices studied here utilize dielectric nanostructures that support strong near-field optical interactions with neighboring structures and complex optical mode dynamics. We envision that these concepts can be integrated with practical applications in optical communications, spectroscopy, and laser optics.

中文翻译:

介电超表面的超高效反常折射

异常折射是极端波形操纵的一种形式,可以使用人工结构化的纳米材料(例如超材料或超表面)来实现。尽管先前已针对选择的输入和输出角度证明了这种现象,但要高效地将其推广到任意角度仍然是一个挑战。在这项研究中,我们表明,周期性的介电超表面可以支持几乎任意组合的入射角和出射角(对于大于50°的角而言> 90%的效率)的超高效反常折射。既可以实现偏振相关的设备,也可以实现与偏振无关的设备配置,并且所获得的指标大大超过了常规超颖表面的能力。此处研究的许多设备都利用电介质纳米结构,该结构支持与相邻结构的强近场光学相互作用以及复杂的光学模式动力学。我们设想这些概念可以与光通信,光谱学和激光光学中的实际应用集成在一起。
更新日期:2018-03-15
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