TY - JOUR
T1 - Empirical Model of Optical Sensing via Spectral Shift of Circular Bragg Phenomenon
AU - Mackay, Tom G.
AU - Lakhtakia, Akhlesh
N1 - 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: [email protected]).
PY - 2010/2
Y1 - 2010/2
N2 - 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.
AB - 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.
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U2 - 10.1109/JPHOT.2010.2042589
DO - 10.1109/JPHOT.2010.2042589
M3 - Article
AN - SCOPUS:85008036581
SN - 1943-0655
VL - 2
SP - 92
EP - 101
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
IS - 1
ER -