Reconfigurable Multistate Optical Systems Enabled by VO2 Phase Transitions

TL;DR

This paper presents a multistate reconfigurable optical system using VO2 phase transitions, enabling dynamic control, encryption, and enhanced functionalities beyond current single-state devices.

Contribution

It introduces a novel multistate optical system enabled by VO2 phase transitions, controlled by multiple stimuli, including temperature, hydrogen-doping, and electron-doping.

Findings

Demonstrated quadruple-state plasmonic display responsive to temperature and hydrogen-doping.

Developed an electron-doping scheme for local phase-control and optical encryption.

Showed substantial improvements over existing optical devices in capabilities and functionalities.

Abstract

Reconfigurable optical systems are the object of continuing, intensive research activities, as they hold great promise for realizing a new generation of compact, miniaturized, and flexible optical devices. However, current reconfigurable systems often tune only a single state variable triggered by an external stimulus, thus, leaving out many potential applications. Here we demonstrate a reconfigurable multistate optical system enabled by phase transitions in vanadium dioxide (VO2). By controlling the phase-transition characteristics of VO2 with simultaneous stimuli, the responses of the optical system can be reconfigured among multiple states. In particular, we show a quadruple-state dynamic plasmonic display that responds to both temperature tuning and hydrogen-doping. Furthermore, we introduce an electron-doping scheme to locally control the phase-transition behavior of VO2, enabling an optical encryption device encoded by multiple keys. Our work points the way toward advanced multistate reconfigurable optical systems, which substantially outperform current optical devices in both breadth of capabilities and functionalities.