A Deformable Low-Threshold Optical Limiter with Oligothiophene-Doped Liquid Crystals

2021 ◽  
Author(s):  
Koji Usui ◽  
Kohsuke Matsumoto ◽  
Erika Katayama ◽  
Norihisa Akamatsu ◽  
Atsushi Shishido
Keyword(s):  
Liquid Crystals ◽  
Optical Limiter ◽  
Low Threshold

Low-threshold lasing at the edge of a photonic stop band in cholesteric liquid crystals

1998 ◽  
Vol 23 (21) ◽  
pp. 1707 ◽  
Author(s):  
V. I. Kopp ◽  
B. Fan ◽  
H. K. M. Vithana ◽  
A. Z. Genack
Keyword(s):  
Liquid Crystals ◽  
Stop Band ◽  
Cholesteric Liquid Crystals ◽  
Photonic Stop Band ◽  
Low Threshold

Low Threshold DFB Lasing in Chiral Liquid Crystals

2008 ◽  
Vol 364 (1) ◽  
pp. 33-59 ◽  
Author(s):  
V. A. Belyakov
Keyword(s):  
Liquid Crystals ◽  
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.

scholarly journals Low-Threshold-Voltage and Electrically Switchable Polarization-Selective Scattering Mode Liquid Crystal Light Shutters

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1354 ◽  
Author(s):  
Zhe-Yung Liang ◽  
Ching-Yen Tu ◽  
Tsung-Hsun Yang ◽  
Cheng-Kai Liu ◽  
Ko-Ting Cheng
Keyword(s):  
Liquid Crystals ◽  
Light Scattering ◽  
Threshold Voltage ◽  
Weight Ratio ◽  
Surface Anchoring ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed ◽  
Low Threshold ◽  
Switchable Polarization ◽  
The Cost

Low-threshold-voltage (Vth) and electrically switchable, polarization-selective scattering mode light shutters (PSMLSs) using polymer-dispersed liquid crystals (PDLCs) are demonstrated in this work. The optimized weight ratio of the nematic liquid crystals (LCs) to the adopted monomer (NBA107, Norland Optics) in the low-Vth PDLCs based on NBA107 is 7:3, [7:3]-PDLCsNBA107. The properties of the low-Vth PDLCsNBA107, such as light-scattering performance, initial transmission, Vth, and droplet size were investigated. Experiment results show that the surface anchoring (threshold-voltage) of NBA107 is weaker (lower) than or equal to that of the common NOA65. The cost is that the response time of the proposed PDLCsNBA107 is relatively long. A method to reduce the decay time, which can be applied to all other PDLC devices, will be elucidated. In addition to the low Vth of the proposed PDLCsNBA107, the operation voltage (~6 Vrms) to approach the maximum transmission is relatively low in a 7 μm-thick PDLCsNBA107 cell. Moreover, the polarization-selective light-scattering performances of the proposed PSMLSs based on the [7:3]-PDLCsNBA107, mainly driven by in-plane and vertical fields, are also demonstrated.

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

Low threshold and coherent random lasing from dye-doped cholesteric liquid crystals using oriented cells

Laser Physics ◽  
2013 ◽  
Vol 23 (8) ◽  
pp. 085001 ◽  
Author(s):  
Longwu Li ◽  
Luogen Deng
Keyword(s):  
Liquid Crystals ◽  
Random Lasing ◽  
Cholesteric Liquid Crystals ◽  
Low Threshold

scholarly journals Low-threshold power and tunable integrated optical limiter based on an ultracompact VO2/Si waveguide

APL Photonics ◽  
2021 ◽  
Author(s):  
Jorge Parra ◽  
Juan Navarro ◽  
Mariela Menghini ◽  
Maria Recaman ◽  
Jean-Pierre Locquet ◽  
...  
Keyword(s):  
Threshold Power ◽  
Optical Limiter ◽  
Integrated Optical ◽  
Low Threshold

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

Low-threshold high-dynamic-range optical limiter for ultra-short laser pulses

2002 ◽  
Vol 74 (6) ◽  
pp. 553-557 ◽  
Author(s):  
A. Nevejina-Sturhan ◽  
O. Werhahn ◽  
U. Siegner
Keyword(s):  
Dynamic Range ◽  
Laser Pulses ◽  
High Dynamic Range ◽  
Optical Limiter ◽  
Short Laser Pulses ◽  
Low Threshold ◽  
High Dynamic
Sign in / Sign up

Export Citation Format

Share Document