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Proceedings Paper

Infrared surface plasmon resonance hosts for sensors
Author(s): Gautam Medhi; Justin W. Cleary; Robert E. Peale; Glenn Boreman; Walter R. Buchwald; Sandy Wentzell; Oliver Edwards; Isaiah Oladeji
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Paper Abstract

A Surface Plasmon Resonance (SPR) biosensor that operates deep into the infrared (3-11 μm wavelengths) is potentially capable of biomolecule recognition based on both selective binding and characteristic vibrational modes. The goal is to operate such sensors at wavelengths where biological analytes are strongly differentiated by their IR absorption spectra and where the refractive index is increased by dispersion. This will provide enhanced selectivity and sensitivity, when biological analytes bind reversibly to biomolecular recognition elements attached to the sensor surface. This paper investigates potentially useful IR surface plasmon resonances hosts on lamellar gratings formed from various materials with plasma frequencies in the IR wavelength range. These materials include doped semiconductors, CuSnS, graphite and semimetal Bi and Sb. Theoretical results were compared with the experimental results. Penetration depth measurement from the experimental complex permeabilities values shows the tighter mode confinement than for usual Au giving better overlap with biological analytes.

Paper Details

Date Published: 23 August 2011
PDF: 7 pages
Proc. SPIE 8173, Photonics 2010: Tenth International Conference on Fiber Optics and Photonics, 81731N (23 August 2011); doi: 10.1117/12.900100
Show Author Affiliations
Gautam Medhi, Univ. of Central Florida (United States)
Justin W. Cleary, Univ. of Central Florida (United States)
Robert E. Peale, Univ. of Central Florida (United States)
Glenn Boreman, Univ. of Central Florida (United States)
Walter R. Buchwald, Air Force Research Lab. (United States)
Sandy Wentzell, Air Force Research Lab. (United States)
Oliver Edwards, Zyberwear Inc. (United States)
Isaiah Oladeji, Sisom Thin Films, LLC (United States)

Published in SPIE Proceedings Vol. 8173:
Photonics 2010: Tenth International Conference on Fiber Optics and Photonics
Sunil K. Khijwania; Banshi D. Gupta; Bishnu P. Pal; Anurag Sharma, Editor(s)

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