Tunable oriented mid-infrared wave based on metasurface with phase change material of GST
Results in Physics, ISSN: 2211-3797, Vol: 34, Page: 105269
2022
- 22Citations
- 8Captures
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Article Description
Dynamically controlling the mid-infrared electromagnetic waves with tunable metasurfaces remains a challenging task. Phase change material of Ge 2 Sb 2 Te 5 (GST) has shown tremendous advantages in constructing reconfigurable metasurface. In this work, we design a metasurface with GST to dynamically focus and deflect the beam at wavelength of 8.5 μm with a fixed structure. The designed metasurface is composed of GST nanocylinders on a Calcium Fluoride (CaF 2 ) substrate. The focusing and deflection characteristics are manipulated by artificially controlling the value of crystalline fraction of each GST cylinder. In addition, we studied the diffraction pattern at a distance of 2 m for oriented deflection and its broadband performance. This method improves the degree of freedom of active modulation and provides a new route for tunable optical communication devices.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2211379722000687; http://dx.doi.org/10.1016/j.rinp.2022.105269; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85123889504&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2211379722000687; https://dx.doi.org/10.1016/j.rinp.2022.105269
Elsevier BV
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