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.
Z. Li et al., "Strong Circular Dichroism in Chiral Plasmonic Metasurfaces Optimized by Micro-Genetic Algorithm," Optics Express, vol. 27, no. 20, pp. 28313-28323, Optical Society of America (OSA), Sep 2019.
The definitive version is available at https://doi.org/10.1364/OE.27.028313
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)
Article - Journal
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
01 Sep 2019