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Journal of Nanophotonics

Narrow and multiband optical filters using couple inverse conical helix sculptured thin films
Author(s): Amin Mir; Nader Sobhkhiz
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Paper Abstract

Optical properties, reflectance and transmittance, of couple inverse conical helix sculptured thin films are investigated using a combination of local homogenization and transfer-matrix method and are compared with a normal chiral one. Varying radius, the major conical helix characteristic, contributes to circular Bragg phenomenon (CBP) in a limited range of wavelengths, not continuously but discretely. These discrete high-reflection regimes in the proposed structure are narrower in comparison to those in fixed-radius structures. The effect of engineering structural parameters, including radius variations and loops making the structure, on peaks’ quantity and intensity and on bandwidth of spectrum in which the CBP occurs have been investigated.

Paper Details

Date Published: 15 April 2016
PDF: 11 pages
J. Nanophoton. 10(2) 026005 doi: 10.1117/1.JNP.10.026005
Published in: Journal of Nanophotonics Volume 10, Issue 2
Show Author Affiliations
Amin Mir, Tarbiat Moallem Univ. (Iran, Islamic Republic of)
Nader Sobhkhiz, Tarbiat Modares Univ. (Iran)

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