Abstract

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.

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Design; Genetic Algorithms; Infrared Devices; Plasmonics; Stereochemistry, Binary Patterns; Chemical and Biological Sensing; Future Applications; Linearly Polarized; Micro Genetic Algorithm; Near-Infrared Wavelength; Parameter Modification; Universal Design, Dichroism, Article; Chirality; Circular Dichroism; Genetic Algorithm

International Standard Serial Number (ISSN)

1094-4087

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Publication Date

01 Sep 2019

PubMed ID

31684585

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