Electrically reconfigurable terahertz digital metasurface based on vanadium dioxide phase transition

Qinling Deng; Ruirui Song; Yan Tang; Shaolin Zhou

doi:10.1117/12.2601956

24 November 2021 Electrically reconfigurable terahertz digital metasurface based on vanadium dioxide phase transition

Qinling Deng, Ruirui Song, Yan Tang, Shaolin Zhou

Proceedings Volume 12066, AOPC 2021: Micro-optics and MOEMS; 1206607 (2021) https://doi.org/10.1117/12.2601956
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

The combination of phase change materials and metasurfaces has enabled myriads of versatile platforms for dynamic wave control, especially for various applications in integrated photonics and optoelectronics. In this paper, an electrically reconfigurable metasurface is demonstrated to work as a terahertz (THz) broadband digital switch by integration of vanadium dioxide (VO2). In such integrated optoelectronic frameworks, active and bistable digital control of optical responses is enabled by applying electrical stimuli to vertically cascaded metasurfaces with broadband behaviors for Joule heating that causes phase change and state switching. Before and after phase change, a high contrast ratio of transmittance is demonstrated within a broad THz range up to 400 GHz. Essentially, fast switching can be guaranteed compared with current devices based on thin film phase change materials, due to the local electrical heating that proves inherently efficient and faster to trigger the phase transition process. As a result, such active optoelectronic framework based on phase change materials may pave a new way for emerging integrated devices such as photoelectric switch, photonic memory, signal processing and so on

Citation Download Citation

Qinling Deng, Ruirui Song, Yan Tang, and Shaolin Zhou "Electrically reconfigurable terahertz digital metasurface based on vanadium dioxide phase transition", Proc. SPIE 12066, AOPC 2021: Micro-optics and MOEMS, 1206607 (24 November 2021); https://doi.org/10.1117/12.2601956

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