TY - JOUR
T1 - Response of slanted chiral sculptured thin films to dipolar sources
AU - Wang, Fei
AU - Lakhtakia, Akhlesh
N1 - Funding Information:
The authors thank Abdul H. Aziz of the Penn State Institute for High Performance Computing Applications for computing assistance. F.W. thanks the Penn State Weiss Graduate Program for a Dissertation Fellowship. A.L. thanks the Trustees of the Pennsylvania State University for a sabbatical leave-of-absence.
PY - 2004/5/1
Y1 - 2004/5/1
N2 - A theoretical investigation of the electromagnetic response of a slanted chiral sculptured thin film (STF) to dipolar sources is presented. Dyadic Green functions (DGFs) for a slanted chiral STF sandwiched between two vacuous half-spaces are formulated as planewave angular spectrums. First, the response of the slanted chiral STF to obliquely incident plane waves is obtained by rigorous coupled-wave analysis implemented with a stable algorithm; then, asymptotic evaluation of the DGFs is carried in the far-field limit. The radiation patterns of Beltrami source configurations close to a slanted chiral STF are computed and discussed. In particular, certain characteristic features - which are closely related to the circular Bragg phenomenon - in the radiation patterns are found to be spatially asymmetric, because of the effective transverse periodicity of the chosen thin film.
AB - A theoretical investigation of the electromagnetic response of a slanted chiral sculptured thin film (STF) to dipolar sources is presented. Dyadic Green functions (DGFs) for a slanted chiral STF sandwiched between two vacuous half-spaces are formulated as planewave angular spectrums. First, the response of the slanted chiral STF to obliquely incident plane waves is obtained by rigorous coupled-wave analysis implemented with a stable algorithm; then, asymptotic evaluation of the DGFs is carried in the far-field limit. The radiation patterns of Beltrami source configurations close to a slanted chiral STF are computed and discussed. In particular, certain characteristic features - which are closely related to the circular Bragg phenomenon - in the radiation patterns are found to be spatially asymmetric, because of the effective transverse periodicity of the chosen thin film.
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U2 - 10.1016/j.optcom.2004.03.016
DO - 10.1016/j.optcom.2004.03.016
M3 - Article
AN - SCOPUS:1842812092
SN - 0030-4018
VL - 235
SP - 133
EP - 151
JO - Optics Communications
JF - Optics Communications
IS - 1-3
ER -