TY - JOUR
T1 - Suppression of circular Bragg phenomenon in chiral sculptured thin films produced with simultaneous rocking and rotation of substrate during serial bideposition
AU - Swiontek, Stephen E.
AU - Pulsifer, Drew P.
AU - Xu, Jian
AU - Lakhtakia, Akhlesh
N1 - Funding Information:
S. E. S. and A. L. are grateful to the Charles Godfrey Binder Endowment at the Pennsylvania State University for partial financial support. S. E. S. fabricated the thin films and made optical measurements. D. P. P. assisted in the fabrication of thin films and collected SE-SEM images. J. X. supervised optical measurements, while A. L. directed the overall research reported here. The manuscript was written chiefly by S. E. S. and A. L.
PY - 2013
Y1 - 2013
N2 - Chiral sculptured thin films (STFs) produced by substrate rotation during physical vapor deposition exhibit the circular Bragg phenomenon, whereby normally incident leftand right-circularly polarized plane waves are discriminated in a spectral regime called the circular Bragg regime. Theory had predicted that substrate rocking, in synchrony with substrate rotation, during deposition could suppress the propensity to exhibit the circular Bragg phenomenon. Therefore chiral STFs of a dielectric material were fabricated with/without substrate rocking, and their transmittance spectrums for incident linearly and circularly polarized plane waves were measured. With sufficient rocking amplitude, the discrimination between incident left- and right-circularly polarized light nearly vanished, whereas a Bragg phenomenon for all normally incident plane waves was observed. Thus, chiral STF technology can be used to produce both ordinary and circular-polarization Bragg filters.
AB - Chiral sculptured thin films (STFs) produced by substrate rotation during physical vapor deposition exhibit the circular Bragg phenomenon, whereby normally incident leftand right-circularly polarized plane waves are discriminated in a spectral regime called the circular Bragg regime. Theory had predicted that substrate rocking, in synchrony with substrate rotation, during deposition could suppress the propensity to exhibit the circular Bragg phenomenon. Therefore chiral STFs of a dielectric material were fabricated with/without substrate rocking, and their transmittance spectrums for incident linearly and circularly polarized plane waves were measured. With sufficient rocking amplitude, the discrimination between incident left- and right-circularly polarized light nearly vanished, whereas a Bragg phenomenon for all normally incident plane waves was observed. Thus, chiral STF technology can be used to produce both ordinary and circular-polarization Bragg filters.
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U2 - 10.1117/1.JNP.7.073599
DO - 10.1117/1.JNP.7.073599
M3 - Article
AN - SCOPUS:84885010656
SN - 1934-2608
VL - 7
JO - Journal of Nanophotonics
JF - Journal of Nanophotonics
IS - 1
M1 - 12131SSP
ER -