One-dimensional photonic crystals with a planar oriented nematic layer: Temperature and angular dependence of the spectra of defect modes

Описание

Тип публикации: статья из журнала

Год издания: 2008

Идентификатор DOI: 10.1007/s11447-008-2017-9

Ключевые слова: Crystal orientation, Mirrors, Phase transitions, Photonic band gap, Polarization, Wavelength, Dielectric mirrors, Parallel-polarized component, Transmission spectra, Nematic liquid crystals

Аннотация: Transmission spectra of a one-dimensional photonic crystal (PC) formed by two multilayer dielectric mirrors and a planar oriented layer of 5CB nematic liquid crystal (LC) that is sandwiched between these mirrors and serves as a structure defect are investigated experimentally. Specific features of the behavior of the spectrum of deПоказать полностьюfect modes as a function of the angle of incidence of light on the crystal are studied for two polarizations: parallel and perpendicular to the director of the LC; the director either lies in the plane of incidence or is perpendicular to it. It is shown that, for the configurations considered, the maxima of the defect modes shift toward the short-wavelength region as the tilt angle of incidence radiation increases; this tendency is more manifest for the parallel-polarized component, when the director lies in the plane of incidence. In the latter case, the width of the photonic band gap (PBG) appreciably decreases. The temperature dependence of the polarization components of the transmission spectra of a PC is investigated in the case of normal incidence of light. The spectral shift of defect modes due to the variation of the refractive index of the LC at the nematic-isotropic liquid phase transition point is measured. It is shown that, in real PCs, the amplitude of defect modes decreases when approaching the center of the band gap, as well as when the number of layers in the dielectric mirrors increases. Theoretical transmission spectra of the PCs calculated by the method of recurrence relations with regard to the decay of defect modes are in good agreement with experimental data. © 2008 Pleiades Publishing, Ltd.

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Издание

Журнал: Journal of Experimental and Theoretical Physics

Выпуск журнала: Vol. 106, Is. 2

Номера страниц: 388-398

ISSN журнала: 10637761

Авторы

  • Arkhipkin V.G. (Siberian Federal University)
  • Gunyakov V.A. (Siberian Federal University)
  • Myslivets S.A. (Kirenskii Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Gerasimov V.P. (Kirenskii Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Zyryanov V.Ya. (Siberian Federal University)
  • Shabanov V.F. (Kirenskii Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Vetrov S.Ya. (Siberian Federal University)

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