高效全介质超表面在传输模式下实现超紧凑光束操控。
High-Efficiency All-Dielectric Metasurfaces for Ultracompact Beam Manipulation in Transmission Mode.
机构信息
Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260, United States.
Toronto Nanofabrication Centre, University of Toronto , Toronto, ON M5S 3G4, Canada.
出版信息
Nano Lett. 2015 Sep 9;15(9):6261-6. doi: 10.1021/acs.nanolett.5b02926. Epub 2015 Aug 21.
Metasurfaces are two-dimensional structures enabling complete control on light amplitude, phase, and polarization. Unlike plasmonic metasurfaces, silicon structures facilitate high transmission, low losses, and compatibility with existing semiconductor technologies. We experimentally demonstrate two examples of high-efficiency polarization-sensitive dielectric metasurfaces with 2π phase control in transmission mode (45% transmission efficiency for the vortex converter and 36% transmission efficiency for the beam steering device) at telecommunication wavelengths. Silicon metasurfaces are poised to enable a versatile platform for the realization of all-optical circuitry on a chip.
超表面是一种二维结构，可以对光的振幅、相位和偏振进行完全控制。与等离子体超表面不同，硅结构具有高传输率、低损耗以及与现有半导体技术兼容的特点。我们在实验中演示了两种高效偏振敏感介电超表面的实例，它们在传输模式下具有 2π 相移控制（涡旋转换器的传输效率为 45%，光束转向器件的传输效率为 36%），工作波长位于电信波段。硅超表面有望成为在芯片上实现全光电路的通用平台。
Zotero 插件