Strong circular dichroism in chiral plasmonic metasurfaces optimized by micro-genetic algorithm

被引：42

作者：

Li, Zhigang ^{[1
]}

Rosenmann, Daniel ^{[2
]}

Czaplewski, David A. ^{[2
]}

Yang, Xiaodong ^{[1
]}

Gao, Jie ^{[1
]}

机构：

[1] Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO 65409 USA

[2] Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 20期

基金：

美国国家科学基金会;

关键词：

REFRACTIVE-INDEX; METAMATERIAL; DESIGN; POLARIZATION; ABSORBERS;

D O I：

10.1364/OE.27.028313

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Strong circular dichroism in absorption in the near-infrared wavelength range is realized by designing binary-pattern chiral plasmonic metasurfaces via the micro-genetic algorithm optimization method. The influence of geometric parameter modifications in the binary-pattern nanostructures on the circular dichroism performance is studied. The strong circular dichroism in absorption is attributed to the simultaneous excitation and field interference of the resonant modes with relative phase delay under linearly polarized incident light. This work provides a universal design method toward the on-demand properties of chiral metasurfaces, which paves the way for future applications in chemical and biological sensing, chiral imaging and spectroscopy. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：28313 / 28323

页数：11

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