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Proceedings Paper

Photonic crystals for narrow-band infrared emission
Author(s): Martin U. Pralle; Mark P. McNeal; Nicholas Moelders; Lisa Last; William Ho; Anton C. Greenwald; James T. Daly; Irina Puscasu; Edward A. Johnson; Ihab El-Kady; Rana Biswas
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Paper Abstract

MEMS silicon (Si) micro-bridge elements, with photonic band gap (PBG) modified surfaces are exploited for narrow-band spectral tuning in the infrared wavelength regime. Thermally isolated, uniformly heated single crystal Si micro-heaters would otherwise provide gray-body emission, in accordance with Planck's distribution function. The introduction of an artificial dielectric periodicity in the Si, with a surface, vapor-deposited gold (Au) metal film, governs the photonic frequency spectrum of permitted propagation, which then couples with surface plasmon states at the metal surface. Narrow band spectral tuning was accomplished through control of symmetry and lattice spacing of the PBG patterns. Transfer matrix calculations were used to model the frequency dependence of reflectance for several lattice spacings. Theoretical predictions that showed narrow-band reflectance at relevant wavelengths for gas sensing and detection were then compared to measured reflectance spectra from processed devices. Narrow band infrared emission was confirmed on both conductively heated and electrically driven devices.

Paper Details

Date Published: 7 February 2002
PDF: 8 pages
Proc. SPIE 4574, Instrumentation for Air Pollution and Global Atmospheric Monitoring, (7 February 2002); doi: 10.1117/12.455159
Show Author Affiliations
Martin U. Pralle, Ion Optics, Inc. (United States)
Mark P. McNeal, Ion Optics, Inc. (United States)
Nicholas Moelders, Ion Optics, Inc. (United States)
Lisa Last, Ion Optics, Inc. (United States)
William Ho, Ion Optics, Inc. (United States)
Anton C. Greenwald, Ion Optics, Inc. (United States)
James T. Daly, Ion Optics, Inc. (United States)
Irina Puscasu, Ion Optics, Inc. (United States)
Edward A. Johnson, Ion Optics, Inc. (United States)
Ihab El-Kady, Iowa State Univ./Ames Lab. (United States)
Rana Biswas, Iowa State Univ./Ames Lab. (United States)

Published in SPIE Proceedings Vol. 4574:
Instrumentation for Air Pollution and Global Atmospheric Monitoring
James O. Jensen; Robert L. Spellicy, Editor(s)

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