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Proceedings Paper

Active tunable filters based on GeSbTe phase-change materials and surface plasmon resonance (Conference Presentation)
Author(s): Hyun Jung Kim; Matthew Julian; Calum Williams; Scott M. Bartram; David G. MacDonnell

Paper 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.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11276, Optical Components and Materials XVII, 112760C (10 March 2020); doi: 10.1117/12.2543812
Show Author Affiliations
Hyun Jung Kim, National Institute of Aerospace (United States)
Matthew Julian, Univ. of Virginia (United States)
Calum Williams, Univ. of Cambridge (United Kingdom)
Scott M. Bartram, NASA Langley Research Ctr. (United States)
David G. MacDonnell, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 11276:
Optical Components and Materials XVII
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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