scholarly journals Photoerasable and photorewritable spatially-tunable laser based on a dye-doped cholesteric liquid crystal with a photoisomerizable chiral dopant

2010 ◽  
Vol 18 (9) ◽  
pp. 9496 ◽  
Author(s):  
Shih-Hung Lin ◽  
Cang-Yi Shyu ◽  
Jui-Hsiang Liu ◽  
Po-Chih Yang ◽  
Ting-Shan Mo ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Tunable Laser

Polymerized cholesteric liquid crystal microdisks generated by centrifugal microfluidics towards tunable laser emissions [Invited]

2020 ◽  
Vol 18 (8) ◽  
pp. 080006
Author(s):  
Ya-Hao Ge ◽  
Yi-Mei Lan ◽  
Xing-Rui Li ◽  
Yu-Wei Shan ◽  
Yu-Jie Yang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Tunable Laser ◽  
Centrifugal Microfluidics

Wide tunable laser based on electrically regulated bandwidth broadening in polymer-stabilized cholesteric liquid crystal

2019 ◽  
Vol 7 (2) ◽  
pp. 137 ◽  
Author(s):  
Hongbo Lu ◽  
Cheng Wei ◽  
Qiang Zhang ◽  
Miao Xu ◽  
Yunsheng Ding ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Tunable Laser ◽  
Polymer Stabilized ◽  
Bandwidth Broadening

scholarly journals Electrically tunable laser based on oblique heliconical cholesteric liquid crystal

2016 ◽  
Vol 113 (46) ◽  
pp. 12925-12928 ◽  
Author(s):  
Jie Xiang ◽  
Andrii Varanytsia ◽  
Fred Minkowski ◽  
Daniel A. Paterson ◽  
John M. D. Storey ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Cholesteric Liquid Crystal ◽  
Visible Spectrum ◽  
Tunable Laser ◽  
Helical Structure ◽  
Acute Angle ◽  
Helical Axis ◽  
Harmonic Structure ◽  
Tunable Range

A cholesteric liquid crystal (CLC) formed by chiral molecules represents a self-assembled one-dimensionally periodic helical structure with pitch p in the submicrometer and micrometer range. Because of the spatial periodicity of the dielectric permittivity, a CLC doped with a fluorescent dye and pumped optically is capable of mirrorless lasing. An attractive feature of a CLC laser is that the pitch p and thus the wavelength of lasing λ¯ can be tuned, for example, by chemical composition. However, the most desired mode to tune the laser, by an electric field, has so far been elusive. Here we present the realization of an electrically tunable laser with λ¯ spanning an extraordinarily broad range (>100 nm) of the visible spectrum. The effect is achieved by using an electric-field-induced oblique helicoidal (OH) state in which the molecules form an acute angle with the helicoidal axis rather than align perpendicularly to it as in a field-free CLC. The principal advantage of the electrically controlled CLCOH laser is that the electric field is applied parallel to the helical axis and thus changes the pitch but preserves the single-harmonic structure. The preserved single-harmonic structure ensures efficiency of lasing in the entire tunable range of emission. The broad tuning range of CLCOH lasers, coupled with their microscopic size and narrow line widths, may enable new applications in areas such as diagnostics, sensing, microscopy, displays, and holography.

Dispersion of proton spin-lattice relaxation in a cholesteric liquid crystal

1983 ◽  
Vol 44 (10) ◽  
pp. 1179-1184 ◽  
Author(s):  
M. Vilfan ◽  
R. Blinc ◽  
J. Dolinšek ◽  
M. Ipavec ◽  
G. Lahajnar ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Lattice Relaxation ◽  
Proton Spin ◽  
Spin Lattice Relaxation ◽  
Spin Lattice

scholarly journals Flow-assisted self-healing of the helical structure in a cholesteric liquid crystal

2021 ◽  
Vol 155 (5) ◽  
pp. 054903
Author(s):  
Jan-Christoph Eichler ◽  
Robert A. Skutnik ◽  
Marco G. Mazza ◽  
Martin Schoen
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Helical Structure ◽  
Self Healing

scholarly journals The temperature dependence of the helical pitch in a cholesteric liquid crystal

2021 ◽  
pp. e1881638
Author(s):  
Robert A. Skutnik ◽  
Jan-Christoph Eichler ◽  
Marco G. Mazza ◽  
Martin Schoen
Keyword(s):  
Liquid Crystal ◽  
Temperature Dependence ◽  
Cholesteric Liquid Crystal ◽  
Helical Pitch

Electrically tunable cholesteric liquid crystal lines defects

2021 ◽  
Vol 114 ◽  
pp. 110960
Author(s):  
Lotfi Saadaoui ◽  
Ridha Hamdi
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal

Nonlinear optical properties of fast, photoswitchable cholesteric liquid crystal bandgaps

2011 ◽  
Vol 1 (5) ◽  
pp. 943 ◽  
Author(s):  
Uladzimir A. Hrozhyk ◽  
Svetlana V. Serak ◽  
Nelson V. Tabiryan ◽  
Timothy J. White ◽  
Timothy J. Bunning
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Nonlinear Optical ◽  
Cholesteric Liquid Crystal ◽  
Nonlinear Optical Properties
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