Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1002/lpor.202000290

Ключевые слова: bound state in the continuum, Brewster resonance, Distributed bragg reflector, liquid crystal, optical anisotropy, Q factor

Аннотация: Quasibound state in the continuum (quasi-BIC) is a long-lived state with a high quality factor (Q factor). Here quasi-BICs in nematic liquid crystal (LC) layer embedded between a distributed Bragg reflector (DBR) and a metal layer are studied. First, a special class of true BICs between the DBR and the metal film with field localizПоказать полностьюation provided by the Brewster transverse electric (TE) reflection in the DBR is experimentally demonstrated. It is demonstrated that the Q factor of the quasi-BIC can be tuned by the LC optical axis rotation in a wide range being only restricted by metal losses. The change of coupling with the radiation channel leads to a critical coupling condition, providing a total absorption of incident light. The acquired quasi-BIC resonance is extremely sensitive to the temperature due to the narrow nematic temperature range of the LC. The quasi-BIC transforms to BIC at the LC-isotropic clearing point, due to closing of the radiation channel.

Журнал: Laser & Photonics Reviews

Выпуск журнала: Т. 15, № 5

Номера страниц: 2000290

ISSN журнала: 18638880

Издатель: Wiley - VCH Verlag GmbH & CO. KGaA

• Wu B.R. (Institute of Imaging and Biomedical Photonics and Institute of Photonic System,National Chiao Tung University and National Yang Ming Chiao Tung University)
• Yang J.H. (Institute of Imaging and Biomedical Photonics and Institute of Photonic System,National Chiao Tung University and National Yang Ming Chiao Tung University)
• Huang C.H. (Institute of Imaging and Biomedical Photonics and Institute of Photonic System,National Chiao Tung University and National Yang Ming Chiao Tung University)
• Lee W. (Institute of Imaging and Biomedical Photonics and Institute of Photonic System,National Chiao Tung University and National Yang Ming Chiao Tung University)
• Chen K.P. (Institute of Imaging and Biomedical Photonics and Institute of Photonic System,National Chiao Tung University and National Yang Ming Chiao Tung University)
• Pankin P.S. (Institute of Engineering Physics and Radio Electronics,Siberian Federal University)
• Maksimov D.N. (Institute of Engineering Physics and Radio Electronics,Siberian Federal University)
• Timofeev I.V. (Institute of Engineering Physics and Radio Electronics,Siberian Federal University)

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