Tunable optical behavior of infrared filters with phase change material

Ahmet Ozer; Hasan Kocer; Hamza Kurt

doi:10.1117/1.JNP.12.046022

31 December 2018 Tunable optical behavior of infrared filters with phase change material

Ahmet Ozer, Hasan Kocer, Hamza Kurt

Author Affiliations +

Journal of Nanophotonics, Vol. 12, Issue 4, 046022 (December 2018). https://doi.org/10.1117/1.JNP.12.046022

Abstract

We propose an asymmetric to quasisymmetric behavioral tunability of a structured filter operating in the mid-infrared (IR) spectral region, where the atmospheric transparency is high. The structure is designed through electromagnetic wave analysis using finite-difference time-domain computations. The behavioral tunability provides dynamic control of the optical behavior of the IR filter without geometric and structural changes and opens up a field of research area in the tunable IR devices. It is shown that optical characteristic can be switched from an optical diode (unidirectional isolator or asymmetric light transmission) to the bidirectional isolator (quasisymmetric behavior) based on the phase transition of vanadium dioxide in the entire mid-IR spectrum. The proposed structure can be fabricated with the current nano and microfabrication techniques and can be utilized in smart front IR windows for protecting delicate sensors in the IR imaging systems and IR missile seekers under strong IR laser radiation.

Citation Download Citation

Ahmet Ozer, Hasan Kocer, and Hamza Kurt "Tunable optical behavior of infrared filters with phase change material," Journal of Nanophotonics 12(4), 046022 (31 December 2018). https://doi.org/10.1117/1.JNP.12.046022

Received: 3 August 2018; Accepted: 7 December 2018; Published: 31 December 2018

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