<i>In situ</i>tunable circular dichroism of flexible chiral metasurfaces composed of plasmonic nanorod trimers
Hsiang‐Ting Lin, Yao-Yu Hsu, Pi‐Ju Cheng, Wei‐Ting Wang, Shu‐Wei Chang, Min‐Hsiung Shih
Abstract
optical chirality tunable nanorod trimer metasurfaces consisting of two types of nanorod dimers are demonstrated and integrated with a flexible polydimethylsiloxane (PDMS) substrate. The optical chirality variations originating from the tunable asymmetricity of nanorod trimers under different stretching scenarios are evaluated. Through the processes, the gap distances between nanorods are varied, and the degree of circular polarization of the transmitted wave is controlled through the manipulation of localized surface plasmon resonance (LSPR) coupling. The results reveal the circular dichroism tunability and durability of fabricated chiral metasurfaces which can be important elements for chip-scale flexible optoelectronic integrated circuits for sensing, display and communication applications.