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13 March 2024 Tunable angular insensitive mid-infrared transmission filters using GST and the design optimization for electrical switching
Dylan J. Morden, Shivashankra Vangala, Joshua Hendrickson, Matthew Klein, Imad Agha, Ivan Avrutsky
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Proceedings Volume PC12896, Photonic and Phononic Properties of Engineered Nanostructures XIV; PC128960G (2024) https://doi.org/10.1117/12.3003430
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Resonant cavity structures integrated with phase change material germanium antimony telluride (GST) function as angular insensitive mid-infrared optical filters. The one-dimensional (1D) sub-wavelength grating structures consisting of GST resonators embedded in metallic (Ag) film act as Fabry-Perot resonators with observable transmission resonances, that can be tuned by thermal excitation when GST switches from amorphous to crystalline state, while maintaining angular insensitivity up to 60 degrees. Modeling and experimental results of an interdigitated design of the 1D resonant structure for reconfigurable applications by electrical switching of the transmission spectra of the optical filter will be presented.
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Dylan J. Morden, Shivashankra Vangala, Joshua Hendrickson, Matthew Klein, Imad Agha, and Ivan Avrutsky "Tunable angular insensitive mid-infrared transmission filters using GST and the design optimization for electrical switching", Proc. SPIE PC12896, Photonic and Phononic Properties of Engineered Nanostructures XIV, PC128960G (13 March 2024); https://doi.org/10.1117/12.3003430
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KEYWORDS
Tunable filters
Design and modelling
Switching
Crystals
Mid-IR
Optical switching
Optical filters
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