Electrically controlled Bragg resonances of an ambichiral electro-optic structure: oblique incidence

Mukul Dixit and Akhlesh Lakhtakia

CATMAS Computational Theoretical Materials Sciences Group,

 Department of Engineering Science & Mechanics,
Pennsylvania State University, University Park,PA 16802-6812,USA.

Tel: +1 814 863 4319; Fax: +1 814 865 9974 E-mail: [email protected], [email protected]

The Pockels effect can increase the effective birefringence of ambichiral, electro-optic rejection filters made of materials with a 42m point. group symmetry, when a dc electric field is applied parallel to the axis of nonhomogeneity. The reflectances and the transmittances of stich an ambichiral structure for obliquely incident plane waves are solvable through a boundary—value problem that is formulated using the frequency—domain Maxwell equations, the constitutive equations that contain the Pockels effect, and standard algebraic technique for handling 4×4 matrix ordinary differential equations. The Bragg resonance peaks, for different circular-polarized—incidence conditions, blueshift as the angle of incidence increases. These blueshifts are unaffected by the sign of the dc electric field. © Anita Publications. All rights reserved.
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