Photonic density and nonreciprocal optical properties in chiral liquid crystals |
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| Authors: | AH Gevorgyan AN Kocharian |
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| Affiliation: | 1. Department of Physics, Yerevan State University, 1 Alex Manoogian, 0025 Yerevan, Armenia;2. Department of Physics and Astronomy, California State University, Los Angeles, CA 90032, USA;1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, People''s Republic of China;2. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, People''s Republic of China;1. Department of Electrical and Electronics Engineering, Kilis 7 Aralik University, Kilis, 7900, Turkey;2. Department of Electrical and Electronics Engineering, ?skenderun Technical University, ?skenderun, Hatay 31200, Turkey;3. Metamaterials and Photonics Research Group ?skenderun Technical University, ?skenderun, Hatay 31200, Turkey;4. Department of Electrical and Electronics Engineering, Middle East Technical University – Northern Cyprus Campus, Kalkanli, Guzelyurt, TRNC/Mersin 10, Turkey;1. Department of Solid State Physics, University of Athens, Panepistimioupolis, GR-157 84 Athens, Greece;2. Donostia International Physics Center (DIPC) and Centro de Física de Materiales (CFM) CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, Donostia-San Sebastián 20018, Spain |
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| Abstract: | Nonreciprocal optical properties of anisotropic (nano-film) heterostructures made of a cholesteric and nematic liquid crystal (CLC-NLC) layers are studied. Namely, a NLC-CLC (and CLC-NLC) structures are considered in which the NLC layer is a quarter-wave plate. The problem is exactly solvable by Ambartsumians’ modified layer addition and Mullers’ transfer-matrix methods. The peculiarities of the polarization dependent properties, such as the photonic density of states, reflection spectra, the polarization plane rotation and ellipticity spectra are investigated. It is shown that such a system canwork as a light modulator, an element for obtaining linearly polarized light with an electrically tunable polarization plane rotation, or a transformer of non-polarized source into linearly polarized light. The analysis of the optical properties in investigated structures can be used for design of perspective optical diodes, microlasers and multifunctional elements on chiral liquid crystals with electrically tunable polarization plane rotation and field controlled light polarization. |
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