Second harmonic generation and its interaction with relativistic plasma waves driven by forward Raman instability in underdense plasmas

1997 ◽  
Vol 4 (4) ◽  
pp. 1127-1131 ◽  
Author(s):  
V. Malka ◽  
A. Modena ◽  
Z. Najmudin ◽  
A. E. Dangor ◽  
C. E. Clayton ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Plasma Waves ◽  
Relativistic Plasma ◽  
Underdense Plasmas

Second Harmonic Generation of Stimulated Raman Scattered Light in Underdense Plasmas

1995 ◽  
Vol 75 (20) ◽  
pp. 3681-3684 ◽  
Author(s):  
K. Krushelnick ◽  
A. Ting ◽  
H. R. Burris ◽  
A. Fisher ◽  
C. Manka ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Scattered Light ◽  
Underdense Plasmas ◽  
Stimulated Raman

scholarly journals Forward second harmonic emission from laser plasma filaments

1992 ◽  
Vol 10 (4) ◽  
pp. 617-627
Author(s):  
I. Deha ◽  
V. Biancalana ◽  
F. Bianconi ◽  
M. Borghesi ◽  
P. Chessa ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Laser Intensity ◽  
Laser Energy ◽  
Second Harmonic ◽  
Target Position ◽  
Thin Foil ◽  
Laser Pulses ◽  
Time Resolved ◽  
Underdense Plasmas

Experimental observations are reported on the interaction of 1-μm laser light with underdense plasmas (n ≤ 0·25 nc) from thin foil plastic targets. Nominal laser intensity on target was up to 3 × 1013 W/cm2 in a 3-ns pulse, but much higher intensity was reached due to spiky laser pulses. We studied forward-emitted second harmonic light as a diagnostic of the interaction and in particular of the occurrence of filamentation. Measurements included: energy monitoring of 2ω forward emission vs. target position and laser energy; time resolved (120-ps gate) imaging of the interaction region cross section. The second harmonic energy level was found to be sensitive to target position. In addition, the images obtained with the target in position of maximum second harmonic generation showed unstable structures whose scale length is comparable with the expected one for maximum filamentation growth. These results are shortly discussed in the framework of stationary filamentation theory and second harmonic generation in inhomogeneous media.

scholarly journals Functional 2D nanomaterials for optoelectronic equipment on the basis of langmuir–blodgett bacteriorhodopsin films

2016 ◽  
Vol 19 (2) ◽  
pp. 124-132
Author(s):  
S. I. Valyanskii ◽  
E. K. Naimi ◽  
L. V. Kozhitov
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Plasma Waves ◽  
Surface Plasma ◽  
Langmuir Blodgett ◽  
Surface Plasma Waves ◽  
Langmuir Blodgett Films ◽  
Monomolecular Layers

We have tested the possibility of using monomolecular layers of bacteriorhodopsin (BR) for the synthesis of highly sensitive and highly selective sensors based on second harmonic generation and surface plasma waves. We have used various methods to study the optical and nonlinear optical properties of Langmuir-Blodgett films of BR in order to clarify the extent to which specific properties of BR molecules are retained during their transfer from the surface of water to a solid substrate. We show that the second harmonic generation method is efficient for analyzing the molecular orientation and quality of Langmuir-Blodgett films. The experimental nonlinear optical susceptibility of second order BR molecules is 3.4 · 10-11m/V. The relative change in the resonant wave vector is (3.6 ± 0.1)·10-2at an excitation light wavelength of 630 nm. We have obtained a BR spectrum with the effective excitation by incident radiation of surface plasma waves. On the basis of these studies, we have proposed new schemes of biosensors operating on the basis of second harmonic generation and surface plasma resonance caused by fundamental frequency reflection from BR monomolecular layers. This scheme was tested for a model device and demonstrated the possibility of obtaining sensitivities of the order of 1011molecules/cm3.

Relativistic second-harmonic generation of a laser from underdense plasmas

2005 ◽  
Vol 12 (1) ◽  
pp. 013101-013101-4 ◽  
Author(s):  
K. P. Singh ◽  
D. N. Gupta ◽  
Sushila Yadav ◽  
V. K. Tripathi
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Underdense Plasmas
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