Angular tuning of defect modes spectrum in the one-dimensional photonic crystal with liquid-crystal layer


Тип публикации: статья из журнала

Год издания: 2007

Идентификатор DOI: 10.1140/epje/i2007-10239-7

Ключевые слова: 42.25.Bs Wave propagation, transmission and absorption, 42.70.Df Liquid crystals, 42.70.Qs Photonic bandgap materials, Angles of incidence, Angular tuning, Defect modes, Electric polarization, Photonic bandgap materials, Radiation losses, Absorption, Defects, Light polarization, Liquid crystals, One dimensional, Phase shift, Wave propagation, Photonic crystals

Аннотация: A one-dimensional ZrO2/SiO2 photonic crystal with a 4-n -pentyl-4'-cyanobiphenyl (5CB) nematic defect layer was used to investigate the transmission spectra of light polarized parallel and perpendicular to the liquid-crystal director at different angles of incidence. The spectra of the photonic crystal were shown to split into fourПоказать полностьюpolarized components T-ij at oblique incidence. When the incident angle increased, the bandgap edges and the defect modes shifted towards short wavelengths, while the amplitudes of the defect modes increased for the transverse magnetic polarization and decreased for the transverse electric polarization. The observed discrepancy between the defect mode amplitudes in the center and near the edges of the photonic bandgap was found to be related to the radiation losses inside the defect layer of a non-ideal photonic crystal. The simulated transmission spectra obtained using recurrence relations and taking into account the decay of defect modes are in good agreement with the experimental data.

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Выпуск журнала: Vol. 24, Is. 3

Номера страниц: 297-302

ISSN журнала: 12928941

Место издания: NEW YORK

Издатель: SPRINGER