Comparison of picosecond four-wave mixing techniques for measuring orientational relaxation times

1986 ◽  
Author(s):  
Anne B. Myers ◽  
Robin M. Hochstrasser
Keyword(s):  
Relaxation Times ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Orientational Relaxation ◽  
Mixing Techniques

Nonlinear-optical response in polythiophene films using four-wave mixing techniques

1989 ◽  
Vol 14 (23) ◽  
pp. 1321 ◽  
Author(s):  
R. Zamboni ◽  
R. Dorsinville ◽  
Lina Yang ◽  
R. Danieli ◽  
G. Ruani ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Response ◽  
Four Wave Mixing ◽  
Nonlinear Optical Response ◽  
Wave Mixing ◽  
Mixing Techniques

Mapping of differently doped InP wafers by nanosecond and picosecond four-wave mixing techniques

2006 ◽  
Author(s):  
Saulius Nargelas ◽  
Ramūnas Aleksiejūnas ◽  
Arūnas Kadys ◽  
Vytautas Gudelis ◽  
Kęstutis Jarašiūnas
Keyword(s):  
Four Wave Mixing ◽  
Wave Mixing ◽  
Mixing Techniques

Excited state dynamics in phthalocyanines studied using degenerate four wave mixing with incoherent light

2002 ◽  
Vol 06 (03) ◽  
pp. 233-237 ◽  
Author(s):  
S. Venugopal Rao ◽  
D. Narayana Rao
Keyword(s):  
Excited State ◽  
Relaxation Times ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Phase Relaxation ◽  
Incoherent Light ◽  
Phase Conjugate ◽  
Excited State Dynamics ◽  
Degenerate Four Wave Mixing ◽  
Population Relaxation

We present our experimental results on the measurements of excited state dynamics in phthalocyanines ( Pc , CuPc , FePc , and ZnPc ) using degenerate four wave mixing with incoherent light (DFWM-IL). Three different timescales were observed, for all samples, in the phase conjugate signal recorded as a function of delay in probe beam in the standard backward geometry. The fastest component (< 170 fs) is associated to the phase relaxation in the S n states and the slowest components (∼3-5 ps and 35-55 ps) to the vibration and population relaxation times from the S1 state. The present results are compared with those obtained with shorter pulses and various techniques for similar molecules. The consequences of such short lifetimes are also discussed in view of the strong optical limiting properties of these molecules.

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.

Ultrafast relaxation times of metalloporphyrins by time-resolved degenerate four-wave mixing with incoherent light

1997 ◽  
Vol 14 (10) ◽  
pp. 2710 ◽  
Author(s):  
D. Narayana Rao ◽  
S. Venugopal Rao ◽  
F. J. Aranda ◽  
D. V. G. L. N. Rao ◽  
M. Nakashima ◽  
...  
Keyword(s):  
Relaxation Times ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Incoherent Light ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
Degenerate Four Wave Mixing

Efficient monochromator to isolate VUV light generated by four-wave mixing techniques

1988 ◽  
Vol 27 (19) ◽  
pp. 4057 ◽  
Author(s):  
William A. VonDrasek ◽  
Shigeo Okajima ◽  
Jan P. Hessler
Keyword(s):  
Four Wave Mixing ◽  
Wave Mixing ◽  
Mixing Techniques
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