DocumentCode :
3505303
Title :
Relativistic second-harmonic generation of a laser from underdense plasmas
Author :
Singh, K.P. ; Yadav, Suneel ; Gupta, V.L. ; Tripathi, V.K.
Author_Institution :
Dept. of Electron. Sci., Univ. of Delhi, New Delhi, India
fYear :
2004
fDate :
1-1 July 2004
Firstpage :
262
Abstract :
Summary form only given. A high intensity laser obliquely incident on a vacuum-plasma interface produces second-harmonic radiation in the reflected component. The efficiency of second-harmonic generation increases with the angle of incidence, up to critical angle of incidence (our model is not valid beyond critical angle of incidence). Efficiency also depends on electron density, showing a maximum at /spl omega//sub p//sup 2///spl omega//sup 2/=0.7, where /spl omega//sub p/ and /spl omega/ are relativistic plasma frequency and laser frequency respectively. The efficiency of second-harmonic generation increases sharply with laser intensity in the non-relativistic regime and saturates at higher intensities. The intensity of the second-harmonic is proportional to square of the laser intensity at low pump laser intensities and tends to proportional to laser intensity in the strong relativistic regime.
Keywords :
optical harmonic generation; plasma density; relativistic plasmas; electron density; low pump laser intensity; nonrelativistic regime; plasmas; relativistic plasma frequency; relativistic second harmonic generation; second harmonic radiation; vacuum-plasma interface; Frequency; Laser excitation; Laser modes; Laser theory; Nuclear and plasma sciences; Physics; Plasma density; Pump lasers; Vacuum technology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. The 31st IEEE International Conference on
Conference_Location :
Baltimore, MD, USA
ISSN :
0730-9244
Print_ISBN :
0-7803-8334-6
Type :
conf
DOI :
10.1109/PLASMA.2004.1339900
Filename :
1339900
Link To Document :
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