Tunable directional filter for mid-infrared optical transmission switching

Andrew Butler, Jack Schulz, Christos Argyropoulos

Research output: Contribution to journalArticlepeer-review


Controlling the spectral and angular response of infrared (IR) radiation is a challenging task of paramount importance to various emerging photonic applications. Here, we overcome these problems by proposing and analyzing a new design of a tunable narrowband directional optical transmission filter. The presented thermally controlled multilayer filter leverages the temperature dependent phase change properties of vanadium dioxide (VO2) to enable efficient and reversible fast optical switching by using a pump-probe laser excitation setup. More specifically, transmission is blocked for high intensity probe lasers due to the VO2 metallic properties induced at elevated temperatures while at low probe laser intensities high transmission through the filter occurs only for a narrowband IR range confined to near normal incident angles. The proposed multilayer composite dielectric filter is expected to have applications in optical communications, where it can act as dual functional infrared filter and optical switch.

Original languageEnglish (US)
Pages (from-to)39716-39724
Number of pages9
JournalOptics Express
Issue number22
StatePublished - Oct 24 2022

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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