paper 150204111706

Published: 2015-07-09

Coupled Resonator Mediated Transmission of Light through Sub-wavelength Holes for Multispectral Imaging Applications

Walter R. Buchwald,

Walter R. Buchwald

University of Massachusetts Boston, USA

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K. C. Kerby-Patel

University of Massachusetts Boston, USA

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Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1187-1191

Abstract

Using finite difference time domain techniques, the transmission of light through 6 µm period arrays of sub-wavelength holes in optically thick metallic films is investigated. Over the wavelength range 2 µm to 16 µm, it is observed that by centering an additional metallic element within the sub-wavelength hole, well defined resonance peaks are produced which are strongly dependent on resonator and hole dimensions but only weakly dependent on metal film thickness. Resonant line-width however, is found to be strongly dependent on metal film thick- ness. Thicker films produced the narrowest full-width half-max values, which were less than 1.0 µm. Such control of resonant wavelength and line-width, along with the size of the elements investigated and the 6 µm array period used, suggests the fabrication of an optical filter with transmission properties that vary across the face of a focal plane array for use in multispectral imaging applications.

Citation

Walter R. Buchwald, and K. C. Kerby-Patel, "Coupled Resonator Mediated Transmission of Light through Sub-wavelength Holes for Multispectral Imaging Applications," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1187-1191

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