DocumentCode :
2072460
Title :
Experimental observation of sub-Bragg frequency gaps in photonic crystals
Author :
Huisman, S.R. ; Nair, R.V. ; Hartsuiker, A. ; Woldering, L.A. ; Mosk, A.P. ; Vos, W.L.
Author_Institution :
Complex Photonic Syst. (COPS), Univ. of Twente, Enschede, Netherlands
fYear :
2011
fDate :
22-26 May 2011
Firstpage :
1
Lastpage :
1
Abstract :
Photonic crystals control light propagation at a fundamental level. Photonic crystals are ordered composite materials with a spatially varying dielectric constant that has a periodicity of the order of the wavelength of light. Frequency gaps emerge for which light cannot propagate inside such structure due to Bragg diffraction. These frequency gaps appear in experiments as stopbands. This paper investigates stopbands in directions of high symmetry for two-dimensional photonic crystals. Surprisingly, a stopband below the first order Bragg condition was observed. This result is valid not only for photonic crystals, but for wave propagation in periodic media in general. This has implications for crystallography, scattering of phonons and band gap formation.
Keywords :
elemental semiconductors; light diffraction; light propagation; permittivity; photonic crystals; silicon; Bragg diffraction; Si; band gap formation; crystallography; dielectric constant; first order Bragg condition; frequency gaps; light propagation; ordered composite materials; periodic media; periodicity; phonon scattering; photonic crystals; stopbands; subBragg frequency gaps; wave propagation; Nonhomogeneous media; Photonics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference
Conference_Location :
Munich
ISSN :
Pending
Print_ISBN :
978-1-4577-0533-5
Electronic_ISBN :
Pending
Type :
conf
DOI :
10.1109/CLEOE.2011.5943214
Filename :
5943214
Link To Document :
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