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17 March 2023 Tunable metasurfaces using ultralow-loss phase-change materials
Mengyun Wang, June Sang Lee, Samarth Aggarwal, Nikolaos Farmakidis, Yuhan He, Tangsheng Cheng, Harish Bhaskaran
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Proceedings Volume PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII; PC1243117 (2023) https://doi.org/10.1117/12.2650320
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
There is a growing interest in the use of chalcogenide phase-change materials (PCMs) for reconfigurable metasurfaces to realize next-generation compact adaptive optical systems. However, the application of the classic PCM composition such as Ge2Sb2Te5 for near infrared metasurfaces has been limited due to its high absorption in the crystalline state. Here, by using an ultralow-loss and high-index phase-change material Sb2Se3, we show reconfigurable metasurfaces can manipulate light efficiently in near infrared region with comparable efficiencies in both the amorphous and crystalline states of the material.
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Mengyun Wang, June Sang Lee, Samarth Aggarwal, Nikolaos Farmakidis, Yuhan He, Tangsheng Cheng, and Harish Bhaskaran "Tunable metasurfaces using ultralow-loss phase-change materials", Proc. SPIE PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, PC1243117 (17 March 2023); https://doi.org/10.1117/12.2650320
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KEYWORDS
Crystals
Near infrared
Chalcogenides
Active optics
Mid-IR
Modulation
Optical properties
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