Photo-ionic driven transitions in reconfigurable chalcogenide metasurfaces

Liam McRae; Yunhui Xie; Behrad Gholipour

doi:10.1117/12.2569004

20 August 2020 Photo-ionic driven transitions in reconfigurable chalcogenide metasurfaces

Liam McRae, Yunhui Xie, Behrad Gholipour

Proceedings Volume 11460, Metamaterials, Metadevices, and Metasystems 2020; 114602X (2020) https://doi.org/10.1117/12.2569004
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Conference Poster

Abstract

Chalcogenide glasses offer a unique platform for the realization of reconfigurable and tunable metasurfaces, as evidenced through the emergence of reconfigurable phase change metamaterials. Reconfiguration in these devices involves a thermally intensive melt/quench phase transition process which can reduce device lifetimes and degrade performance. Notably, metal doped chalcogenide semiconductors also exhibit photo-induced long-range movement of their constituent metal ions in their amorphous phase, resulting in non-volatile changes to refractive index and conductivity, removing the need for a phase transition. We utilize this photo-ionic movement in amorphous nanostructured silver-doped germanium selenide metasurfaces to demonstrate reversible non-volatile switching over optical frequencies.

Conference Presentation

Citation Download Citation

Liam McRae, Yunhui Xie, and Behrad Gholipour "Photo-ionic driven transitions in reconfigurable chalcogenide metasurfaces", Proc. SPIE 11460, Metamaterials, Metadevices, and Metasystems 2020, 114602X (20 August 2020); https://doi.org/10.1117/12.2569004

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