Chapter

Photonic structures

Ivan Pelant and Jan Valenta

in Luminescence Spectroscopy of Semiconductors

Published in print February 2012 | ISBN: 9780199588336
Published online May 2012 | e-ISBN: 9780191738548 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199588336.003.0016
Photonic structures

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Photonic structures, i.e. periodically ordered patterns with a period of the order of the light wavelength, affect strongly luminescence properties of embedded (nano)phosphors. Photonic crystals exhibit either a full band of forbidden photon energies, or a stop-band. This fact has impact on spontaneous luminescence spectral shape and decay rate. Concerning stimulated emission, slow group velocity of light may lead to significant enhancement of optical gain. Tiny disc microresonators tailor luminescence spectra into whispering gallery modes. Microcavities with distributed Bragg reflectors improve spectral purity and directionality of spontaneous luminescence. The concepts of a polariton laser and of single photon sources are briefly mentioned. Throughout the chapter, the text is accompanied with experimental examples.

Keywords: photonic crystals; photonic bandgap; stop-band; optical gain enhancement; microresonators; microcavities; single photon sources

Chapter.  6444 words.  Illustrated.

Subjects: Atomic, Molecular, and Optical Physics

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