Phase-change band-pass filters for multispectral imaging

Liam Trimby; Anna Baldycheva; C. David Wright

doi:10.1117/12.2290405

21 February 2018 Phase-change band-pass filters for multispectral imaging

Liam Trimby, Anna Baldycheva, C. David Wright

Proceedings Volume 10541, Photonic and Phononic Properties of Engineered Nanostructures VIII; 105412B (2018) https://doi.org/10.1117/12.2290405
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Phase-change materials (PCMs) provide a route to adding dynamic tunability and reconfigurability to many types of photonic devices by changing the phase-state of the PCM itself. In this work we discuss the use of the phase-change alloy GeSbTe (GST) in the design of dynamically tunable filters operating in the infrared. GST is used to manipulate the extraordinary optical transmission of a periodic hole-array in a metallic layer, so creating ultra-thin, tunable band-pass filters. We discuss the use of such filters for multispectral imaging, suggest some approaches to overcome various practical challenges, and, finally, show that through the use of appropriate post processing algorithms this tunable filter could provide a cheap, ultra-thin, real-time, and relatively high performance multispectral imaging device.

Citation Download Citation

Liam Trimby, Anna Baldycheva, and C. David Wright "Phase-change band-pass filters for multispectral imaging", Proc. SPIE 10541, Photonic and Phononic Properties of Engineered Nanostructures VIII, 105412B (21 February 2018); https://doi.org/10.1117/12.2290405

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