A1 Refereed original research article in a scientific journal
Structural considerations on multistopband mesoporous silicon rugate filters prepared for gas sensing purposes
Authors: Jalkanen T, Salonen J, Torres-Costa V, Fukami K, Sakka T, Ogata YH
Publisher: OPTICAL SOC AMER
Publication year: 2011
Journal: Optics Express
Journal name in source: OPTICS EXPRESS
Journal acronym: OPT EXPRESS
Number in series: 14
Volume: 19
Issue: 14
First page : 13291
Last page: 13305
Number of pages: 15
ISSN: 1094-4087
DOI: https://doi.org/10.1364/OE.19.013291
Abstract
Different designs for producing multiple stopband mesoporous silicon rugate filters via electrochemical anodization are compared. The effects of light absorption and dispersion to visible range filter design are investigated. Thermal oxidation is applied for passivating the chemically reactive porous silicon surface, and the response of the passivated structures to ethanol vapor is examined. Differences in gas sensing properties for the various designs are evaluated and possible reasons for the observed differences are discussed. Methods for sidelobe suppression in multipeak filters are discussed and demonstrated, and their effects in gas sensing applications are estimated. (C) 2011 Optical Society of America
Different designs for producing multiple stopband mesoporous silicon rugate filters via electrochemical anodization are compared. The effects of light absorption and dispersion to visible range filter design are investigated. Thermal oxidation is applied for passivating the chemically reactive porous silicon surface, and the response of the passivated structures to ethanol vapor is examined. Differences in gas sensing properties for the various designs are evaluated and possible reasons for the observed differences are discussed. Methods for sidelobe suppression in multipeak filters are discussed and demonstrated, and their effects in gas sensing applications are estimated. (C) 2011 Optical Society of America
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