In situ tunable circular dichroism of flexible chiral metasurfaces composed of plasmonic nanorod trimers. Issue 11 (30th March 2022)

• Record Type: Journal Article
• Authors: Lin, Hsiang-Ting; Hsu, Yao-Yu; Cheng, Pi-Ju; Wang, Wei-Ting; Chang, Shu-Wei; Shih, Min-Hsiung
• Is Part Of: Nanoscale advances. Volume 4:Issue 11(2022)
• Page Start: 2428
• Page End: 2434
• Publication Date: 2022-03-30
• Subjects: 620.5
• DOI: 10.1039/d2na00144f
• Languages: English
• ISSNs: 2516-0230

Abstract

Abstract : We present an ultra-thin flexible chiral metasurface capable for in situ tuning optical circular polarization by mechanical stretching which can be an important element for flexible sensing, display and communication optoelectronic chips. Abstract : The circularly polarized light source is one of the keys to chiral photonic circuits and systems. However, it is difficult to integrate conventional light-emitting devices with circular polarization converters directly into compact chip-scale photonic systems partly because of their bulky structures. In this study, in situ 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.