Photonic defect modes in a cholesteric liquid crystal with a resonant nanocomposite layer and a twist defect

Описание

Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1103/PhysRevE.90.032505

Ключевые слова: Nano-composite layers, Photonic defect mode, Twist defects, nanomaterial, chemistry, light related phenomena, liquid crystal, photon, theoretical model, Liquid Crystals, Models, Theoretical, Nanostructures, Optical Processes, Photons

Аннотация: We have studied spectral properties of a cholesteric liquid crystal with a combined defect consisting of a nanocomposite layer and a twist. The nanocomposite layer is made of metallic nanoballs dispersed in a transparent matrix and featuring effective resonant permittivity. A solution has been found for the transmission spectrum ofПоказать полностьюcircularly polarized waves in the structure. We have analyzed spectral splitting of the defect mode in the band gap of the cholesteric when its frequency coincides with the nanocomposite resonant frequency. Defect modes have characteristics strongly dependent on the magnitude and the sign of the phase difference of the cholesteric helix on both sides of the defect layer. It has been found that the band gap width and the position and localization degree of defect modes can be effectively controlled by external fields applied to the cholesteric.

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Издание

Журнал: PHYSICAL REVIEW E

Выпуск журнала: Vol. 90, Is. 3

ISSN журнала: 15393755

Место издания: COLLEGE PK

Издатель: AMER PHYSICAL SOC

Авторы

  • Vetrov S.Y. (L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation; Institute of Engineering Physics and Radio Electronics, Siberian Federal University)
  • Pyatnov M.V. (L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation; Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation; Krasnoyarsk State Medical University Named Prof. V.F. Voyno-Yasenetsky)
  • Timofeev I.V. (L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation; Laboratory for Nonlinear Optics and Spectroscopy, Siberian Federal University)

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