Phase change reconfigurable optical wavefront synthesis system

Hyun Jung Kim; Kiumars Aryana; Scott Bartram; Stephen Borg; William Humphreys Jr.; Cosmin-Constantin Popescu; Tian Gu; Juejun Hu; Steven Vitale

doi:10.1117/12.2647764

17 March 2023 Phase change reconfigurable optical wavefront synthesis system

Hyun Jung Kim, Kiumars Aryana, Scott Bartram, Stephen Borg, William Humphreys Jr., Cosmin-Constantin Popescu, Tian Gu, Juejun Hu, Steven Vitale

Author Affiliations +

Proceedings Volume PC12432, High Contrast Metastructures XII; PC124320N (2023) https://doi.org/10.1117/12.2647764
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

We report the design, fabrication, and testing of electrically tunable metasurface k-space filters based on the phase-change material GSST and a transparent Si electrode heating architecture. A 10x10 array of PCM elements and Si heaters was fabricated via the foundry processes, and used to control the crystallinity of a metasurface consisting of GSST nano antennae. By selectively crystallizing individual elements, specific k-vectors of transmitted light can effectively be filtered out, resulting in improved imaging quality by reducing the scattered light that reaches the detector. Optimized doping profiles in the Si heaters allow for uniform, low power switching of the GSST state.

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Citation Download Citation

Hyun Jung Kim, Kiumars Aryana, Scott Bartram, Stephen Borg, William Humphreys Jr., Cosmin-Constantin Popescu, Tian Gu, Juejun Hu, and Steven Vitale "Phase change reconfigurable optical wavefront synthesis system", Proc. SPIE PC12432, High Contrast Metastructures XII, PC124320N (17 March 2023); https://doi.org/10.1117/12.2647764

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