Polarization-Independent Silicon Metadevices for Efficient Optical Wavefront Control

被引：353

作者：

Chong, Katie E. ^{[1
]}

Staude, Isabelle ^{[1
]}

James, Anthony ^{[2
]}

Dominguez, Jason ^{[2
]}

Liu, Sheng ^{[2
]}

Campione, Salvatore ^{[2
]}

Subramania, Ganapathi S. ^{[2
]}

Luk, Ting S. ^{[2
]}

Decker, Manuel ^{[1
]}

Neshev, Dragomir N. ^{[1
]}

Brener, Igal ^{[2
]}

Kivshar, Yuri S. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia

[2] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA

来源：

NANO LETTERS | 2015年 / 15卷 / 08期

基金：

澳大利亚研究理事会;

关键词：

Metasurface; metadevice; electromagnetic duality; Huygens' surface; vortex beam; beamshaping; DIRECTIONAL SCATTERING; RESONANCES; METASURFACES;

D O I：

10.1021/acs.nanolett.5b01752

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We experimentally demonstrate a functional silicon metadevice at telecom wavelengths that can efficiently control the wavefront of optical beams by imprinting a spatially varying transmittance phase independent of the polarization of the incident beam. Near-unity transmittance efficiency and close to 0-2 pi phase coverage are enabled by utilizing the localized electric and magnetic Mie-type resonances of low-loss silicon nanoparticles tailored to behave as electromagnetically dual-symmetric scatterers. We apply this concept to realize a metadevice that converts a Gaussian beam into a vortex beam. The required spatial distribution of transmittance phases is achieved by a variation of the lattice spacing as a single geometric control parameter.

引用

页码：5369 / 5374

页数：6

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