Spectral dependence of subwavelength slit geometry

Heath Gemar; Michael Yetzbacher; Ronald Driggers

doi:10.1117/12.2556284

24 April 2020 Spectral dependence of subwavelength slit geometry

Heath Gemar, Michael Yetzbacher, Ronald Driggers

Proceedings Volume 11390, Next-Generation Spectroscopic Technologies XIII; 113900Y (2020) https://doi.org/10.1117/12.2556284
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

For two decades, extraordinary optical transmission (EOT) has amplified exploration into subwavelength systems. Researchers have previously suggested exploiting the spectrally selective electromagnetic field confinement of subwavelength slits for multispectral detectors. Utilizing the finite-difference frequency domain (FDFD) method, we examine electromagnetic field confinement in both 2-dimensional and 3-dimensional scenarios from 2.5 to 6 microns, i.e. midwave infrared (MWIR). We explore the trade space of deep subwavelength slits and its impact on resonant enhancement of the electromagnetic field. This builds fundamental understanding of the coupling mechanisms allowing for prediction of resonant spectral behavior based on slit geometry and material properties.

Conference Presentation

Citation Download Citation

Heath Gemar, Michael Yetzbacher, and Ronald Driggers "Spectral dependence of subwavelength slit geometry", Proc. SPIE 11390, Next-Generation Spectroscopic Technologies XIII, 113900Y (24 April 2020); https://doi.org/10.1117/12.2556284

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