Four-wave mixing signal intensity: Relaxation time effects on the absorptive and dispersive optical properties in a two-level system

2015 ◽  
Vol 24 (02) ◽  
pp. 1550023
Author(s):  
J. L. Paz ◽  
Luis G. Rodríguez ◽  
Cesar Costa-Vera
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Dipole Moments ◽  
Relaxation Times ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Level System ◽  
Time Effects ◽  
Frequency Space ◽  
Signal Response

A study of the effects of relaxation times on the Four-Wave Mixing (FWM) signal response in frequency space for a two-level system is presented where the collisional effects of the solvent and the presence of the electromagnetic field are considered. The model is a generalization of the conventional two-level approach in that it includes a simplified description of the molecular structure associated with the non-zero permanent dipole moments. Significant changes in both the FWM-intensity and nonlinear optical properties are observed, due mainly to changes in the ratio between the longitudinal and transversal relaxation times.

Third- and Fifth-Order Optical Properties of Transition Metal Complexes of Benzenedithiol at 1.064 μm

1992 ◽  
Vol 247 ◽  
Author(s):  
J. R. Lindle ◽  
C. S. Weisbecker ◽  
F. J. Bartoli ◽  
R. G. S. Pong ◽  
Z. H. Kafafi
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Nd:Yag Laser ◽  
Nonlinear Optical ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Time Resolved ◽  
Fifth Order

ABSTRACTTime-resolved degenerate four-wave-mixing studies have been conducted on solutions of transition-metal complexes of benzenedithiol using a 35 ps Nd:YAG laser operating at 1.064 μm. The nonlinear optical properties of the first-row Co(d7), Ni(d8), and Cu(d9) and the d8 group Ni and P t transition metal complexes are discussed.

Effects of spectral diffusion on the nonlinear optical properties in two- and three-state quantum systems in a four-wave mixing signal

2018 ◽  
Vol 27 (04) ◽  
pp. 1850038
Author(s):  
F. Moncada ◽  
J. L. Paz ◽  
L. Lascano ◽  
C. Costa-Vera
Keyword(s):  
Nonlinear Optical ◽  
Relaxation Times ◽  
Potential Method ◽  
Four Wave Mixing ◽  
Quantum Systems ◽  
Spectral Diffusion ◽  
Nonlinear Susceptibility ◽  
Matrix Formalism ◽  
Wave Mixing ◽  
Potential Applications

Effects of spectral diffusion on the third-order nonlinear susceptibility for two- and three-level quantum systems, immersed in a thermal reservoir, are evaluated with a four-wave mixing (FWM) signal through the density matrix formalism. For this, inhomogeneously broadened two- and three-level quantum systems are used. In these models, the distribution of natural frequencies follows a Lorentzian function. The absorptive and dispersive nonlinear optical responses are determined for the considered quantum models. The results presented in this work show potential applications in the development of optical switches and provide a potential method to measure spectral diffusion relaxation times in three-level quantum systems.

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