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Proceedings Paper

Photonic and polaritonic band gaps in 2D macroporous silicon structures
Author(s): Lyudmyla Karachevtseva; Alexandr Glushko; Mikola Karas; Volodimir Onishchenko
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Paper Abstract

Out-of-plane optical transmission spectra of 2D photonic macroporous silicon structures are investigated. By the plane wave expansion method all possible 2D lattice symmetries are considered and analyzed both in general case and for p-, s-polarizations. Sharp increase of absorption and formation of photonic band gaps is measured for wavelengths between one and two optical periods of macroporous silicon structure. Thus, for periodic structures one photonic band gap is formed, and some narrow peaks of density of states are formed for structure with the arbitrary macropore distribution. Theoretically unpredicted reduction in the transmittance of electromagnetic radiation and the step formation are observed for wavelengths less than optical period of macropores. Transmission spectra of macroporous silicon as well as steps were explained by a model of directed and decay optical modes formed by macroporous silicon as a short wave-guide structure. Prevalence of absorption over reflection of light, dependence of photoconductivity on incidence angle of the electromagnetic radiation testify to formation of the polaritonic type band formation.

Paper Details

Date Published: 12 October 2005
PDF: 11 pages
Proc. SPIE 5950, Photonic Crystals and Fibers, 59500H (12 October 2005); doi: 10.1117/12.621602
Show Author Affiliations
Lyudmyla Karachevtseva, V. Lashkariov Institute of Semiconductor Physics (Ukraine)
Alexandr Glushko, V. Lashkariov Institute of Semiconductor Physics (Ukraine)
Mikola Karas, V. Lashkariov Institute of Semiconductor Physics (Ukraine)
Volodimir Onishchenko, V. Lashkariov Institute of Semiconductor Physics (Ukraine)

Published in SPIE Proceedings Vol. 5950:
Photonic Crystals and Fibers
Waclaw Urbanczyk; Bozena Jaskorzynska; Philip St. J. Russell, Editor(s)

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