Generation of Non-Classical Light by Four-Wave Mixing in Semiconductors

1998 ◽  
Vol 07 (02) ◽  
pp. 167-180
Author(s):  
A. M. Fox ◽  
M. Dabbicco ◽  
J. F. Ryan
Keyword(s):  
Phase Modulation ◽  
Four Wave Mixing ◽  
Nonlinear Susceptibility ◽  
Squeezed States ◽  
Wave Mixing ◽  
Third Order ◽  
Susceptibility Tensor ◽  
Squeezed Light ◽  
The Third ◽  
Third Order Nonlinear Susceptibility

We describe experiments to generate non-classical quadrature squeezed states of light by four-wave mixing in semiconductors. Squeezing can be achieved with either the diagonal or off-diagonal components of the third-order nonlinear susceptibility tensor. We have demonstrated squeezing by self-phase modulation in ZnS at 780 nm, and by cross-phase modulation in ZnSe at 960 nm. Possibilities for generating squeezed light in other materials by these techniques are discussed.

Enhanced Third Order Optical Nonlinear Response in Polythiophene Films—Polaron Contributions

1989 ◽  
Vol 173 ◽  
Author(s):  
Lina Yang ◽  
R. Dorsinville ◽  
R. Zamboni ◽  
C. Taliani ◽  
R. Tubino ◽  
...  
Keyword(s):  
Nonlinear Response ◽  
Four Wave Mixing ◽  
Nonlinear Susceptibility ◽  
Wave Mixing ◽  
Third Order ◽  
Pump Probe ◽  
Order Of Magnitude ◽  
Degenerate Four Wave Mixing ◽  
Thiophene Based Polymers ◽  
Third Order Nonlinear Susceptibility

ABSTRACTThe enhancement of the third order nonlinear susceptibility χ(3)) of an homologous series of polycondensed thiophene based polymers was observed about photoinduced polaronic bands by a novel “pump-probe” degenerate four wave mixing echnique. Enhancement of the degenerate four wave mixing signal for more than an order of magnitude was achieved with response time of less than 25 ps. The intrachain polarons contribution is proposed as the possible mechanism responsible for the observed enhancement.

Large third-order optical nonlinearity in PdO thin films

2017 ◽  
Vol 26 (03) ◽  
pp. 1750037 ◽  
Author(s):  
M. S. Brodyn ◽  
V. I. Volkov ◽  
V. I. Rudenko ◽  
V. R. Liakhovetskyi ◽  
A. O. Borshch
Keyword(s):  
Thin Films ◽  
Optical Nonlinearity ◽  
Nonlinear Susceptibility ◽  
Wave Mixing ◽  
Third Order ◽  
Pulsed Laser Radiation ◽  
Long Wavelength ◽  
The Third ◽  
Wavelength Absorption ◽  
Third Order Nonlinear Susceptibility

We report on a study of the absorption spectra and third-order nonlinear optical properties of crystalline PdO thin films, grown by oxidation of thin palladium films deposited on a substrate. The spectra reveal an absorption peak at [Formula: see text][Formula: see text]nm, which grows and narrows significantly as the temperature is lowered to [Formula: see text][Formula: see text]K. This behavior suggests an exciton nature of the peak. According to the position of the long wavelength absorption edge in the spectra, the bandgap of the material is [Formula: see text][Formula: see text]eV. Utilizing the techniques of degenerate four-wave mixing and Z-scan, using a pulsed laser radiation with a wavelength [Formula: see text][Formula: see text]nm and a pulse duration of [Formula: see text][Formula: see text]ns, we determined the real part of the third-order nonlinear susceptibility of Re[Formula: see text][Formula: see text]esu. Possible nature of this high refractive nonlinearity is discussed.

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