Nonlinear properties of waveguides with twisted nematic liquid crystal
نویسنده
چکیده
Optical reorientational nonlinearity in twisted nematic liquid crystalline planar waveguide is analyzed theoretically. It is shown that optical nonlinearity for guided modes in analyzed waveguides can be approximated by saturation nonlinearity. Predicted nonlinearity is large enough to observe e¤ects like spatial solitons formation with milliwatts of light power. PACS: 42.65.Wi, 42.70.Df
منابع مشابه
Director Structures in a Chiral Nematic Slab: Threshold Field and Pitch Variations
Abstract The liquid crystal director distribution is determined for a confined chiral nematic slab. The molecular director distribution of the field-controlled chiral nematic slab is directly calculated. The director profiles for the tilt and the twist angles, under different applied fields, are calculated in the slab with weak boundary conditions. Then, the dependence of the threshold field on...
متن کاملNonlinear optical transmission of lead phthalocyanine-doped nematic liquid crystal composites for multiscale nonlinear switching from nanosecond to continuous wave.
We have formulated composites of lead (II) tetrakis (4-cumylphenoxy) phthalocyanine (PbTCPc) doped into nematic liquid crystal (LC), 4(')-pentyl-4-biphenylcarbonitrile (5-CB), that has received a 90 degree twisted alignment and investigated the nonlinear transmission properties using both pulsed (Nd:YLF 524 nm, 5 ns) and cw (532 nm) lasers. In the nanosecond regime, this compound is a reverse s...
متن کاملSimple soluble models of quantum damping applied to cavity quantum electrodynamics
tering and the polymer dispersed liquid crystal display. (E) 194. "The Quartz Watch with Digital Readout," H. R. Crane, The Physics Teacher 32(5), 298-299 (1994). This article describes the operation of a twisted nematic display and is written for high school and college physics educators. (E) 195. "Liquid-Crystal Displays: Molecules at Work," G. P. Crawford and R. J. Ondris-Crawford, Physics E...
متن کاملLiquid Crystals for Electro-optic Applications
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Electro-Optic Response of Liquid Crystals . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. The Liquid Crystalline State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. Physical Properties of Liquid Crystals . . . . . . . . . . . . . . . . . . . . . . ....
متن کاملSolitary waves in liquid crystalline waveguides.
Recently, it has been shown experimentally that the nonlinearity in nematic liquid crystals can govern spatial solitons in both waveguide and bulk geometry. Such solitons require a few milliwatts of light power and can be controlled by the state of light polarization or by an external electrical field. In this paper a detailed theoretical analysis of optical solitary waves in nematic liquid cry...
متن کامل