Empirical Model of Optical Sensing via Spectral Shift of Circular Bragg Phenomenon

Tom G. Mackay; Akhlesh Lakhtakia

doi:10.1109/JPHOT.2010.2042589

Empirical Model of Optical Sensing via Spectral Shift of Circular Bragg Phenomenon

Tom G. Mackay, Akhlesh Lakhtakia

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Setting up an empirical model of optical sensing to exploit the circular Bragg phenomenon displayed by chiral sculptured thin films (CSTFs), we considered a CSTF with and without a central twist defect of π/2 rad. The circular Bragg phenomenon of the defect-free CSTF and the spectral hole in the copolarized reflectance spectrum of the CSTF with the twist defect were both found to be acutely sensitive to the refractive index of a fluid that infiltrates the void regions of the CSTF. These findings bode well for the deployment of CSTFs as optical sensors.

Original language	English (US)
Pages (from-to)	92-101
Number of pages	10
Journal	IEEE Photonics Journal
Volume	2
Issue number	1
DOIs	https://doi.org/10.1109/JPHOT.2010.2042589
State	Published - Feb 2010

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/JPHOT.2010.2042589

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title = "Empirical Model of Optical Sensing via Spectral Shift of Circular Bragg Phenomenon",

abstract = "Setting up an empirical model of optical sensing to exploit the circular Bragg phenomenon displayed by chiral sculptured thin films (CSTFs), we considered a CSTF with and without a central twist defect of π/2 rad. The circular Bragg phenomenon of the defect-free CSTF and the spectral hole in the copolarized reflectance spectrum of the CSTF with the twist defect were both found to be acutely sensitive to the refractive index of a fluid that infiltrates the void regions of the CSTF. These findings bode well for the deployment of CSTFs as optical sensors.",

author = "Mackay, {Tom G.} and Akhlesh Lakhtakia",

note = "Funding Information: Manuscript received December 23, 2009; revised January 29, 2010. First published Online February 8, 2010. Current version published February 26, 2010. The work of T. G. Mackay was supported by a Royal Academy of Engineering/Leverhulme Trust Senior Research Fellowship. The work of A. Lakhtakia was supported in part by the Charles Godfrey Binder Endowment at Penn State. Corresponding author: T. G. Mackay (e-mail: T.Mackay@ed.ac.uk).",

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Empirical Model of Optical Sensing via Spectral Shift of Circular Bragg Phenomenon

Abstract

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