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10 March 2020 Active tunable filters based on GeSbTe phase-change materials and surface plasmon resonance (Conference Presentation)
Hyun Jung Kim, Matthew Julian, Calum Williams, Scott M. Bartram, David G. MacDonnell
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Proceedings Volume 11276, Optical Components and Materials XVII; 112760C (2020) https://doi.org/10.1117/12.2543812
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
Tunable mid-wave infrared (MWIR) filters are highly desirable in a wide variety of imaging and sensing applications. Here, we demonstrate a solid-state, actively tunable, narrowband MWIR transmission filter based on a plasmonic nanohole array (PNA) design integrated with the phase change material GeSbTe (GST). Through finite-difference time domain simulations and experimental results, we show narrowband (~100nm), high-efficiency (~90%) transmission filtering, tunable across the entire MWIR spectrum (1~10µm). The active tunability of the GST/PNA filter has been experimentally demonstrated by single-shot pulsed laser irradiation-induced phase transformation and the device shows consistent behavior across a number of phase change cycles.
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Hyun Jung Kim, Matthew Julian, Calum Williams, Scott M. Bartram, and David G. MacDonnell "Active tunable filters based on GeSbTe phase-change materials and surface plasmon resonance (Conference Presentation)", Proc. SPIE 11276, Optical Components and Materials XVII, 112760C (10 March 2020); https://doi.org/10.1117/12.2543812
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KEYWORDS
Tunable filters
Surface plasmons
Germanium antimony tellurium
Mid-IR
Optical filters
Image filtering
Imaging spectroscopy
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