nematic liquid crystal
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2022 ◽  
Vol 147 ◽  
pp. 107631
Author(s):  
Charlotte Kyeremah ◽  
Jeffrey La ◽  
Mohamed Amine Gharbi ◽  
Chandra S. Yelleswarapu

2022 ◽  
Author(s):  
Karuna Sindhu Malik ◽  
Bosanta Ranjan Boruah

Abstract A dynamic holographic optical trap uses a dynamic diffractive optical element such as a liquid crystal spatial light modulator to realize one or more optical traps with independent controls. Such holographic optical traps provide a number of flexibilities and conveniences useful in various applications. One key requirement for such a trap is the ability to move the trapped microscopic object from one point to the other with the optimal velocity. In this paper we develop a nematic liquid crystal spatial light modulator based holographic optical trap and experimentally investigate the optimal velocity feasible for trapped beads of different sizes, in such a trap. Our results show that the achievable velocity of the trapped bead is a function of size of the bead, step size, interval between two steps and power carried by the laser beam. We observe that the refresh rate of a nematic liquid crystal spatial light modulator is sufficient to achieve an optimal velocity approaching the theoretical limit in the respective holographic trap for beads with radius larger than the wavelength of light.


2022 ◽  
Vol 105 (1) ◽  
Author(s):  
Pawel S. Jung ◽  
Midya Parto ◽  
Georgios G. Pyrialakos ◽  
Hadiseh Nasari ◽  
Katarzyna Rutkowska ◽  
...  

2022 ◽  
pp. 163-211
Author(s):  
V.A. Loiko ◽  
A.V. Konkolovich ◽  
A.A. Miskevich ◽  
M.N. Krakhalev ◽  
O.O. Prishchepa ◽  
...  

2021 ◽  
pp. 2101626
Author(s):  
Inge Nys ◽  
Brecht Berteloot ◽  
Jeroen Beeckman ◽  
Kristiaan Neyts

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1510
Author(s):  
Jia-De Lin ◽  
Po-Chen Wu ◽  
Ting-Shan Mo ◽  
Bing-Yau Huang ◽  
Chie-Tong Kuo ◽  
...  

This study demonstrates controllable random lasing emissions in a dye-doped nematic liquid crystal (DDNLC)-infiltrated microcapillary. The emission wavelength of the micro tube laser can be adjusted by changing the focusing position of the pumped pulses on the center or the periphery of the liquid crystal region of the microcapillary. In addition, with doping azo-dyes in the DDNLC of the micro tube laser, optical controllability of the lasing intensity and wavelength can be further achieved. The controllable micro tube laser may find highly widespread photonic applications in multicolor emitting sources, and vibration and UV sensors.


Author(s):  
Shweta Mishra ◽  
A.M. Sontakke ◽  
R.K. Gupta ◽  
Sandeep Kumar ◽  
V. Manjuladevi

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