Circular dichroism property of conjugated gammadion meta-atom integrated on silicon waveguide. (8th February 2021)

• Record Type: Journal Article
• Authors: Lin, Chia-Yi; Chen, Yu-Yu; Lin, Pao Tai; Chang, Shih-Hui Gilbert
• Is Part Of: Applied physics express. Volume 14:Number 3(2021)
• Publication Date: 2021-02-08
• Subjects: circular dichroism -- metamaterials -- chirality -- optical activity -- FDTD; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/abdcd4
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: The circular dichroism (CD) performance of conjugated gammadion structure on the end facet of silicon waveguide in the mid-infrared regime is investigated theoretically. By engineering the orientation of the structure, the sign and value of its CD spectrum can be changed. For a fixed gammadion structure, different CD values can be obtained not only by changing the excitation wavelength but the excitation waveguide mode. This finding potentially provides an extra degree of freedom to design integrated chiral photonics chips.