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5 March 2022 Phase-change-material (PCM)-based actively tunable filters for both terrestrial and spaceborne platforms
Hyun Jung Kim, Stephen Borg, William Humphreys, Matthew Julian, Calum Williams, David Bombara, Yifei Zhang, Juejun Hu, Tian Gu
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Proceedings Volume PC12011, High Contrast Metastructures XI; PC1201102 (2022) https://doi.org/10.1117/12.2607826
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
In this work, we introduce actively tunable PCM-FP (Fabry-Perot) and PCM-PNA (Plasmonic Nanohole Array) bandpass filters that possess high-speed tunability (MHz), narrow spectral bandwidth, high-transmissivity, broad tuning range, in an all solid-state design in a wide variety of imaging and spectroscopic applications. We also present the results from a Materials International Space Station Experiment (MISSE-14) in which chalcogenide phase change material (PCM) optical components are exposed and tested in Low Earth Orbit to determine their suitability for space applications. Our samples including Ge2Sb2Te5, Ge2Sb2Se4Te1, Sb2S3 thin-films and PCM-FP were delivered aboard the ISS by Northrop Grumman (NG-15) in Feb. 2021 for 6 months of exposure testing, including: temperature, vacuum, atomic oxygen, UV exposure and solar illumination effects. Our MISSE-14 PCM study will provide valuable information on the limitations and suitability of PCMs in harsh space environments.
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Hyun Jung Kim, Stephen Borg, William Humphreys, Matthew Julian, Calum Williams, David Bombara, Yifei Zhang, Juejun Hu, and Tian Gu "Phase-change-material (PCM)-based actively tunable filters for both terrestrial and spaceborne platforms", Proc. SPIE PC12011, High Contrast Metastructures XI, PC1201102 (5 March 2022); https://doi.org/10.1117/12.2607826
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KEYWORDS
Tunable filters
Phase shift keying
Mid-IR
Optical filters
Optical components
Solid state electronics
Thermography
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