Non-linear light propagation and bistability in nematic liquid crystals

2009 ◽  
Author(s):  
Jeroen Beeckman ◽  
Kristiaan Neyts ◽  
Wout De Cort ◽  
Abbas Madani
Keyword(s):  
Liquid Crystals ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Non Linear

scholarly journals Tunable Channel Drop Filter in a Two-Dimensional Photonic Crystal Modulated by a Nematic Liquid Crystal

2006 ◽  
Vol 2006 ◽  
pp. 1-6 ◽  
Author(s):  
Chen-Yang Liu ◽  
Lien-Wen Chen
Keyword(s):  
Liquid Crystals ◽  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Fdtd Method ◽  
Wavelength Division ◽  
Resonance Frequencies ◽  
Potential Applications ◽  
Control Light

Photonic crystals (PCs) have many potential applications because of their ability to control light-wave propagation and because PC-based waveguides may be integrated into optical circuits. We propose a novel tunable PC channel drop filter based on nematic liquid crystals and investigate its properties numerically by using the finite-difference time-domain (FDTD) method. The refractive indices of liquid crystals can be actively modulated after infiltrating nematic liquid crystals into the microcavity in PC waveguides with square lattices. Then we can control light propagation in a PC waveguide. We analyze theQ-factors and resonance frequencies of a tunable PC channel drop filter by considering various indices modulation of liquid crystals. The novel component can be used as wavelength division multiplexing in photonic integrated circuits.

Nonlinear light propagation in photonic crystal fibers filled with nematic liquid crystals

2007 ◽  
Author(s):  
Katarzyna A. Rutkowska ◽  
Urszula A. Laudyn ◽  
Robert T. Rutkowski ◽  
Miroslaw A. Karpierz ◽  
Tomasz R. Wolinski ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystal ◽  
Light Propagation ◽  
Photonic Crystal Fibers ◽  
Nematic Liquid Crystals ◽  
Crystal Fibers

Linear and nonlinear properties of photonic crystal fibers filled with nematic liquid crystals

2006 ◽  
Vol 14 (4) ◽  
Author(s):  
K. Brzdąkiewicz ◽  
U. Laudyn ◽  
M. Karpierz ◽  
T. Woliński ◽  
J. Wójcik
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystal ◽  
Light Propagation ◽  
Near Infrared ◽  
Photonic Crystal Fibers ◽  
Water Solution ◽  
Nematic Liquid Crystals ◽  
Optical Power ◽  
Linear And Nonlinear ◽  
Crystal Fibers

AbstractWe investigate linear and nonlinear light propagation in the photonic crystal fibers infiltrated with nematic liquid crystals. Such a photonic structure, with periodic modulation of refractive index, which could be additionally controlled by the temperature and by the optical power, allows for the study of discrete optical phenomena. Our theoretical investigations, carried out with the near infrared wavelength of 830 nm, for both focusing and defocusing Kerr-type nonlinearity, show the possibility of the transverse light localization, which can result in the discrete soliton generation. In addition, we present the preliminary experimental results on the linear light propagation in the photonic crystal fiber with the glycerin-water solution and 6CHBT nematics, as the guest materials.

Light propagation in periodic photonic structures formed by photo-orientation and photo-polymerization of nematic liquid crystals

2017 ◽  
Vol 25 (2) ◽  
pp. 118-126 ◽  
Author(s):  
K.A. Rutkowska ◽  
M. Chychłowski ◽  
M. Kwaśny ◽  
I. Ostromęcka ◽  
J. Piłka ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Photo Polymerization ◽  
Photonic Structures

Observation of Optical Soliton-Like Propagation in Dye-Doped Nematic Liquid Crystals with Homogeneous Alignment

2013 ◽  
Vol 596 ◽  
pp. 139-143 ◽  
Author(s):  
Tomoyuki Sasaki ◽  
Kenta Miura ◽  
Osamu Hanaizumi ◽  
Nobuhiro Kawatsuki ◽  
Hiroshi Ono
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Laser Beam ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Incident Light ◽  
Absorption Peak ◽  
Photothermal Effect ◽  
Light Power ◽  
Polarization Azimuth

Nonlinear light propagation in a dye-doped liquid crystal (LC) was investigated experimentally. A laser beam with wavelength far from the absorption peak of the material was coupled into an LC cell with homogeneous alignment, and the propagation in the cell was observed. When the polarization azimuth of the incident light was orthogonal to the orientation direction of the LC, soliton-like propagation was obtained for milliwatts of light power in spite of the low absorption. We clarified that the observed nonlinearity is due principally to the photothermal effect enhanced by the dye.

Discrete Light Propagation and Self-Localization in Voltage-Controlled Arrays of Channel Waveguides in Undoped Nematic Liquid Crystals

2006 ◽  
Vol 453 (1) ◽  
pp. 191-202 ◽  
Author(s):  
Andrea Fratalocchi ◽  
Gaetano Assanto ◽  
Katarzyna A. Brzdąkiewicz ◽  
Mirosław A. Karpierz
Keyword(s):  
Liquid Crystals ◽  
Light Propagation ◽  
Nematic Liquid Crystals ◽  
Channel Waveguides
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