Crucial influence of the twist deformation on degenerate four‐wave mixing process in homeotropically aligned nematic liquid crystals

1989 ◽  
Vol 55 (18) ◽  
pp. 1820-1822 ◽  
Author(s):  
Shu‐Hsia Chen ◽  
Chen‐Lung Kuo
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Mixing Process ◽  
Degenerate Four Wave Mixing

Highly efficient non-degenerate four-wave mixing process in InAs/InGaAsP quantum dots

2006 ◽  
Vol 42 (19) ◽  
pp. 1112 ◽  
Author(s):  
Z.G. Lu ◽  
J.R. Liu ◽  
S. Raymond ◽  
P.J. Poole ◽  
P.J. Barrios ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Mixing Process ◽  
Highly Efficient ◽  
Degenerate Four Wave Mixing

scholarly journals Monochromatic Conical IR Emission from Decaying KrF Laser Filaments in Xenon as Coherent Stimulated Four-Wave Mixing Process

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 47
Author(s):  
Igor V. Smetanin ◽  
Alexey V. Shutov ◽  
Nikolay N. Ustinovskii ◽  
Vladimir D. Zvorykin ◽  
Anna V. Bogatskaya ◽  
...  
Keyword(s):  
Transverse Relaxation Time ◽  
Four Wave Mixing ◽  
Theoretical Background ◽  
Wave Mixing ◽  
Mixing Process ◽  
Optical Phenomenon ◽  
Coherent Interaction ◽  
Conical Emission ◽  
Krf Laser ◽  
Ir Emission

We develop theoretical background for the new nonlinear optical phenomenon of narrowly directed monochromatic IR conical emission which has been recently observed when 248-nm UV filaments propagate in xenon (V. D. Zvorykin, et al., Laser Phys. Lett. 13, 125404 (2016)). We treat it as coherent stimulated four-wave mixing process in which two pump KrF laser photons are converted into the coupled pair of resonance IR(828 nm) and VUV (147 nm) photons through 5p5(2P3/2)6p[1/2]0→5p5(2P3/2)6s[3/2]1o and 5p5(2P3/2)6s[3/2]1o→1S0 transitions. We explore the coherent interaction regime which proceeds at a time scale shorter than transverse relaxation time T2. The momentum and energy conservation laws determine the characteristic angle of conical emission. We find that the threshold of this coherent process is determined by the KrF laser pump pulse area.

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