Photonic-crystal-type infrared filters for gas sensors

Oh, Sang Soon ORCID: https://orcid.org/0000-0003-3093-7016 and Choi, Choon-Gi 2008. Photonic-crystal-type infrared filters for gas sensors. Journal of the Korean Physical Society 53 (3) , pp. 1671-1674. 10.3938/jkps.53.1671

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Abstract

For the purpose of carbon-dioxide (CO 2 ) sensors, we propose a photonic crystal (PhC)-type filter that has a narrow pass band at a wavelength of 4.26 mu m in the infrared region. Using the finite-difference time-domain (FDTD) method, we obtained the transmission spectra for various shapes and sizes of the air holes in the PhC type filters. On the basis of the numerical results, we designed and fabricated a PhC-type filter. By measuring the transmission spectra of the fabricated devices, we confirmed that the PhC-type filter could be a candidate for an element of an optical gas sensor. The behavior of the spectral response of the filter with respect to the shape and the size of the air holes was also analyzed.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Springer Verlag
ISSN:	0374-4884
Date of First Compliant Deposit:	22 January 2018
Last Modified:	03 Nov 2022 10:31
URI:	https://orca.cardiff.ac.uk/id/eprint/108339

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