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Time-domain simulation of the circular Bragg phenomenon exhibited by axially excited chiral sculptured thin films

Published online by Cambridge University Press:  15 May 2001

J. B. Geddes III  and
A. Lakhtakia
J. B. Geddes III*
Affiliation:
CATMAS -Computational and Theoretical Materials Sciences Group, Department of Engineering Science and Mechanics, 212 Earth-Engineering Sciences Building, Pennsylvania State University, University Park, PA 16802-6812, USA
A. Lakhtakia
Affiliation:
CATMAS -Computational and Theoretical Materials Sciences Group, Department of Engineering Science and Mechanics, 212 Earth-Engineering Sciences Building, Pennsylvania State University, University Park, PA 16802-6812, USA
*
[email protected][email protected]
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Abstract

We present simulations of the transmission and reflection of narrow-extent pulses incident upon a chiral sculptured thin film (STF) along its axis of spirality, when the circular Bragg phenomenon is excited. Even though the frequency-domain reflection and transmission spectrums of a sufficiently thick chiral STF slab acquire final shapes within the Bragg regime, the shape and the duration of the transmitted pulse change with slab thickness over the entire range of our simulations. The emergence of a multiple-hump structure in the transmitted pulse is relevant to the use of chiral STFs in digital optics communication.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 14 , Issue 2 , May 2001 , pp. 97 - 105
Copyright
© EDP Sciences, 2001

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