Journal
ACS PHOTONICS
Volume 7, Issue 11, Pages 2958-2965Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.0c01241
Keywords
reconfigurable; multistates; phase transition; electron-doping; vanadium oxide
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Funding
- European Research Council (ERC Dynamic Nano) Grant
- Max Planck Society (Max Planck Fellow)
- Triton Systems, Inc.
- National Natural Science Foundation of China [51873102, 51972206]
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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.
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