Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 1, 2006
|
|
---|---|---|
Article Number | 06006 | |
Number of page(s) | 6 | |
DOI | https://doi.org/10.2971/jeos.2006.06006 | |
Published online | 20 June 2006 |
Regular papers
Electrically tunable, ultranarrowband, circular–polarization rejection filters with electro–optic structurally chiral materials
CATMAS — Computational & Theoretical Materials Sciences Group, Department of Engineering Science & Mechanics, Pennsylvania State University, University Park, PA 16802–6812, USA
Received:
8
June
2006
The transmittance spectrum of a slab of an electro–optic structurally chiral material (SCM) that is helicoidally non homogeneous in the thickness direction and is endowed with a central 90°–twist defect, shows evidence of an ultranarrowband spectral hole when a sufficiently high dc electric field is applied between the entry and the exit planes and the incident light is circularly polarized in opposition to the structural handedness of the SCM. This spectral hole migrates on the wavelength axis as the applied dc electric field is altered in magnitude, thereby suggesting the possible use of a centrally defective, electro–optic SCM slab as an electrically tunable, circular–polarization rejection filter with ultra narrow bandwidth.
Key words: Circular Bragg phenomenon / circular polarization / electro–optic filter / phase defect / Pockels effect / rejection filter / spectral hole / structurally chiral material / tunable filter
© The Author(s) 2006. All rights reserved.
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