Narrowband and ultranarrowband filters with electro–optic structurally chiral materials
نویسنده
چکیده
When a circularly polarized plane wave is normally incident on a slab of a structurally chiral material with local 4̄2m point group symmetry and a central twist defect, the slab can function as either a narrowband reflection hole filter for co–handed plane waves or an ultranarrowband transmission hole filter for cross–handed plane waves, depending on its thickness and the magnitude of the applied dc electric field. Exploitation of the Pockels effect significantly reduces the thickness of the slab.
منابع مشابه
N ov 2 00 6 Theory of electrically controlled exhibition of circular Bragg phenomenon by an obliquely excited structurally chiral material . Part 2 : arbitrary dc electric field
Abstract: Numerical examination of the solution of the boundary–value problem of the reflection and transmission of a plane wave due to a slab of an electro–optic structurally chiral material (SCM) indicates that the exhibition of the circular Bragg phenomenon by the SCM can be controlled not only by the sign and the magnitude of a dc electric field but also by its orientation in relation to ax...
متن کاملO ct 2 00 6 Theory of electrically controlled exhibition of circular Bragg phenomenon by an obliquely excited structurally chiral material
The boundary–value problem of the reflection and transmission of a plane wave due to a slab of an electro–optic structurally chiral material (SCM) is formulated in terms of a 4×4 matrix ordinary differential equation. The SCM slab can be locally endowed with one of 20 classes of point group symmetry, and is subjected to a dc voltage across its thickness. The enhancement (and, in some cases, the...
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