Abstract
We propose a memorable and electrically tunable photonic device by infiltrating a dual-mode chiral-doped dual-frequency liquid crystal (LC) as the central defect layer in a one-dimensional photonic crystal (PC). According to the transmission properties of this structure, the wavelength tunability of defect modes is obtained by manipulating the LC layer in the dynamic mode due to the electrically controlled birefringence effect. Moreover, the switching between two memorable states, the splay and π-twist states, creates two distinct sets of defect modes at null voltage. The spectral characteristics of this device ensure its potential application as an energy-efficient multichannel wavelength filter.
Highlights
College of Photonics, National Chiao Tung University, Guiren Dist., Tainan 71150, Taiwan; Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Laboratory for Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk 660041, Russia
Recent investigations concerning the tunability of defect modes as well as the design of electrically tunable photonic devices have extensively been proposed in the literature by incorporating various types of liquid crystal (LC) individually in one-dimensional (1D) multilayer
These two discriminable sets of defect modes obtained in the stable splay (sS) and stable twist (sT) states persist approaching to zero) when switching the cell to the sS state. These two discriminable sets permanently without any applied voltage. This indicates that the photonic crystal (PC)/chiral-agent-doped dual-frequency LC (CD-DFLC) cell operating in the of defect modes obtained in the sS and sT states persist permanently without any applied voltage
Summary
The result demonstrates that distinct spectral profiles of the defect modes reveals the transmission spectra of possible textures of the PC/CD-DFLC cell in two stable and corresponding to the four switchable states in the PC/CD-DFLC can be obtained due to the different two voltage-sustained states. The discussion on the electrical tuning of the by to the components of the ordinary and extraordinary refractive indices, can further be resolved defect-mode wavelengths for two orthogonal polarization states of light are further demonstrated by placing a polarizer between the light source and the cell with its transmission axis perpendicular and operating the cell in the dynamic mode.
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