Influence of the photoinduced EL2 Grating on Electron and Hole Gratings Generated in GaAs

1992 ◽  
Vol 261 ◽  
Author(s):  
Laurent Disdier ◽  
Gerald Roosen
Keyword(s):  
Gallium Arsenide ◽  
Optical Excitation ◽  
Four Wave Mixing ◽  
Index Of Refraction ◽  
Wave Mixing ◽  
Lorentz Model ◽  
Free Carriers ◽  
Nanosecond Pulses ◽  
Theoretical Predictions ◽  
Experimental Values

ABSTRACTDynamic gratings of free carriers are generated from optical excitation of the deep EL2 level in semi insulating gallium arsenide with nanosecond pulses. The nonlinear modification of the crystal index of refraction is evidenced by degenerate four wave mixing experiments. In regards to the sample parameters, a fair agreement is obtained between the experimental values and the theoretical predictions derived from the Drude-Lorentz model and the anharmonic motion of carriers.

Four-wave mixing in the far infrared from free carriers in n-type indium antimonide

1991 ◽  
Vol 16 (19) ◽  
pp. 1511 ◽  
Author(s):  
R. M. Hart ◽  
G. A. Rodríguez ◽  
A. J. Sievers
Keyword(s):  
Indium Antimonide ◽  
Far Infrared ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Free Carriers

Subwavelength Localization of Optical Modes in Fractals

1994 ◽  
Vol 351 ◽  
Author(s):  
Vladimir Shalaev ◽  
R. Botet ◽  
M. Moskovits
Keyword(s):  
Nonlinear Optical ◽  
Optical Excitation ◽  
Four Wave Mixing ◽  
Local Fields ◽  
Wave Mixing ◽  
Fractal Clusters ◽  
Raman Light Scattering ◽  
Optical Effects ◽  
Optical Modes ◽  
Very High

ABSTRACTResonant optical excitation of fractal clusters generates dipolar eigenmodes which are extremely localized within areas much smaller than the wavelength. The localization occurs due to the fractal morphology and accounts for the very high local fields leading to the huge enhancement of various optical effects. In particular, Rayleigh and Raman light scattering and, especially, nonlinear optical processes, such as 2-photon photoemission and degenerate four-wave mixing, are strongly enhanced in fractal clusters. The spatial distribution of the modes shows the frequency and polarization selectivity.

scholarly journals Enhanced index of refraction in four-wave-mixing media

2013 ◽  
Vol 88 (3) ◽  
Author(s):  
Elena Kuznetsova ◽  
Renuka Rajapakse ◽  
S. F. Yelin
Keyword(s):  
Four Wave Mixing ◽  
Index Of Refraction ◽  
Wave Mixing

A VORTEX-FLAME INTERACTION STUDY USING FOUR-WAVE MIXING TECHNIQUES

1996 ◽  
Vol 05 (03) ◽  
pp. 505-526 ◽  
Author(s):  
F. GRISCH ◽  
B. ATTAL-TRETOUT ◽  
P. BOUCHARDY ◽  
V.R. KATTA ◽  
W.M. ROQUEMORE
Keyword(s):  
Four Wave Mixing ◽  
Single Shot ◽  
Spatial Evolution ◽  
Wave Mixing ◽  
Interaction Study ◽  
Theoretical Predictions ◽  
Temporal And Spatial ◽  
Mixing Techniques ◽  
Anti Stokes ◽  
Theoretical Results

Temperature and NO concentration can change dramatically during a vortex-flame interaction. In this paper, a vertically mounted buoyant hydrogen-nitrogen jet diffusion flame is used to study vortex-flame interaction. Single shot measurements of temperature by Coherent Anti-Stokes Raman Scattering (CARS) and of NO concentration by Degenerate Four Wave Mixing (DFWM) are used to investigate the temporal and spatial evolution of the flame. The results are compared with theoretical predictions. Temperature and mole fraction are presented in two-dimensional maps. Experimental and theoretical results are in excellent agreement.

FREQUENCY DETUNING IN BRILLOUIN INDUCED FOUR-WAVE MIXING

1992 ◽  
Vol 01 (03) ◽  
pp. 563-580 ◽  
Author(s):  
K.D. RIDLEY ◽  
A.M. SCOTT ◽  
D.C. JONES
Keyword(s):  
Four Wave Mixing ◽  
Signal Frequency ◽  
Wave Mixing ◽  
Frequency Detuning ◽  
Phase Conjugate ◽  
Unstable Regime ◽  
Theoretical Predictions

We investigate the effect of tuning of the signal frequency in Brillouin induced four-wave mixing. We verify a number of theoretical predictions, and show that in the unstable regime the frequency of the phase conjugate is independent of the signal frequency.

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