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Proceedings Paper

Bare, sintered, coated, and inverted opals for photonic bandgap properties at visible wavelengths
Author(s): Vijaya Ramarao; Tushar Prasad
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Paper Abstract

We have performed calculations using the Transfer Matrix method to study the photonic band gap properties of bare opals of different diameters, different thicknesses, sintered opals with the filling fractions varying between 0.74 and 1.00, partial and complete coating with semiconducting GaN and lastly, inverted opals. Two prominent directions [100] and [111] have been analyzed. Sintering improves the gap and shifts the energy range of its occurrence, while partial coating gives a better bandgap than complete coating. Inverted opals with semiconductor background shows a gap with transmission decreasing to much lower values, as expected due to an improvement in dielectric contrast.

Paper Details

Date Published: 30 October 2001
PDF: 8 pages
Proc. SPIE 4598, Photonics Technology in the 21st Century, (30 October 2001); doi: 10.1117/12.447095
Show Author Affiliations
Vijaya Ramarao, Indian Institute of Technology/Bombay (India)
Tushar Prasad, Indian Institute of Technology/Bombay (United States)

Published in SPIE Proceedings Vol. 4598:
Photonics Technology in the 21st Century
John H. Marsh; Pallab Bhattacharya; Osamu Wada, Editor(s)

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