Journal
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
Volume 118, Issue 6, Pages 891-895Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S106377611406003X
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Funding
- Russian Foundation for Basic Research [02-12-33124-mol_a_ved, 14-02-01130]
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The reflection spectra of a cholesteric photonic crystal have been measured. The experimental spectra are described by a theoretical expression that follows from the analytical solution of the Maxwell equations. The photonic bandgap width Delta nu has been determined. The photonic bandgap width changes abruptly as the position of the diffraction band changes. The temperature dependence of the relative bandgap width Delta nu/nu(0) and the order parameter for a photonic crystal are described by Landau's theory of phase transitions.
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