Low threshold random lasing in dye-doped and strongly disordered chiral liquid crystals

2020 ◽  
Vol 8 (5) ◽  
pp. 642
Author(s):  
Shaohua Gao ◽  
Jiayi Wang ◽  
Wenhua Li ◽  
Xuanyi Yu ◽  
Xinzheng Zhang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Random Lasing ◽  
Low Threshold ◽  
Chiral Liquid Crystals

scholarly journals Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells

2019 ◽  
Vol 10 (1) ◽  
pp. 199 ◽  
Author(s):  
Yuan Wan ◽  
Luogen Deng
Keyword(s):  
Liquid Crystals ◽  
Emission Spectrum ◽  
Localized Surface Plasmon Resonance ◽  
Nematic Liquid Crystals ◽  
Localized Surface Plasmon ◽  
Random Lasing ◽  
Random Lasers ◽  
Tin Nanoparticles ◽  
Low Threshold ◽  
Underlying Mechanisms

Manipulation of the performance of the random lasers from dye-doped nematic liquid crystals with TiN nanoparticles in non-oriented cells is studied. The experimental results show that the introduction of TiN nanoparticles into dye-doped nematic liquid crystals significantly reduces the threshold of random lasing due to the localized surface plasmon resonance of TiN nanoparticles. The emission spectrum of random lasers can be controlled by the shape of the pump spot. The threshold of random lasers increases with the decrease of the length of pump stripe. In order to obtain the emission spectrum with fine discrete sharp peaks, the narrow pump stripe is more effective than the circular pump spot. When the pump area is more like a circle, the emission spectrum is more like an amplified spontaneous emission. The underlying mechanisms of these phenomena are discussed in detail. This study provides a promising platform for designing the high-quality and low-threshold random lasers which can be controlled by the shape of the pump spot.

Study of low-threshold and high-intensity random lasing in dye doped liquid crystals

2016 ◽  
Vol 28 (2) ◽  
pp. 022005 ◽  
Author(s):  
Lihua Ye ◽  
Yan Wang ◽  
Yangyang Feng ◽  
Chong Zhao ◽  
Guohua Hu ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
High Intensity ◽  
Random Lasing ◽  
Low Threshold

A 2*2 fiber optic switch using chiral liquid crystals

1990 ◽  
Vol 2 (2) ◽  
pp. 147-149 ◽  
Author(s):  
N.K. Shankar ◽  
J.A. Morris ◽  
C.P. Yakymyshyn ◽  
C.R. Pollock
Keyword(s):  
Liquid Crystals ◽  
Fiber Optic ◽  
Chiral Liquid Crystals
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