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Electrically tuned active metasurface towards metasurface-integrated liquid crystal on silicon (meta-LCoS) devices.

Published version
Peer-reviewed

Repository DOI


Type

Article

Change log

Authors

Chang, Xin 
Wu, Weijie 
Zhang, Wenhan 

Abstract

Active metasurfaces add a new dimension to static metasurfaces by introducing tunability, and this has received enormous attention from industry. Although various mechanisms have been proposed over the past few years in literature, solutions with good practicality are limited. Liquid crystal (LC)-based active metasurface is one of the most promising approaches due to the well-established LC industry. In this paper, an electrically tunable active metasurface was proposed and experimentally demonstrated using photoaligned nematic LC. The good quality of the LC photoalignment on the metasurface was demonstrated. Tunable transmission was obtained for telecommunication C band and the modulation depth in transmission amplitude of 94% was realized for 1530 nm. Sub-millisecond response time was achieved at operating a temperature of 60°C. The progress made here presents the potential of LC-based active metasurfaces for fast-switching photonic devices at optical communication wavelengths. More importantly, this work lays the foundations for the next-generation liquid crystal on silicon (LCoS) devices that are integrated with metasurfaces (meta-LCoS).

Description

Keywords

51 Physical Sciences, 40 Engineering, 4009 Electronics, Sensors and Digital Hardware, 5103 Classical Physics

Journal Title

Opt Express

Conference Name

Journal ISSN

1094-4087
1094-4087

Volume Title

31

Publisher

Optica Publishing Group
Sponsorship
Engineering and Physical Sciences Research Council (EP/S022139/1)