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Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations

The solvent effects over nonlinear optical properties of a two-level molecular system in presence of a classical electromagnetic field were modeled in this work. The collective effects proper of the thermal reservoir are modeled as a random Bohr frequency, whose manifestation is the broadening of th...

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Autor Principal: Paz Rojas, Jos? Luis
Formato: Libros
Lenguaje:eng
Publicado: 2017
Materias:
OPTICAL
MOLECULAR
SYSTEMS
DIPOLE
Acceso en línea:http://repositorio.educacionsuperior.gob.ec/handle/28000/5084
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spelling oai:localhost:28000-50842017-12-09T14:15:41Z Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations Paz Rojas, Jos? Luis OPTICAL MOLECULAR SYSTEMS DIPOLE The solvent effects over nonlinear optical properties of a two-level molecular system in presence of a classical electromagnetic field were modeled in this work. The collective effects proper of the thermal reservoir are modeled as a random Bohr frequency, whose manifestation is the broadening of the upper level according to a prescribed random function. A technique of work, based in the use of the cumulant expansions to obtain the average in the Fourier components associated with the coherence and populations, evaluated by the use of the Optical Stochastic Bloch Equations (OSBE), is employed. Analytical expressions for susceptibility, optical properties and non-degenerate Four-Wave Mixing (nd-FWM) signal intensity, were obtained. Numerical calculations were carried out to construct surfaces corresponding to these magnitudes as a function of the pump-probe frequency detuning, values of the permanent dipole moments (PDM), noise parameters and relationships between the longitudinal and transversal relaxation times. Our results show that it is necessary to neglect the Rotating-Wave approximation (RWA) in order to measure the effect of the permanent dipole moments and that the inclusion of these favors two-photon transitions over those with one-photon. In general, the effect of non-zero permanent dipole moments, are reflected in the appearance of new and more complex signals associated with new multiphoton processes. 2017-12-09T14:08:44Z 2017-12-09T14:08:44Z 2016-07 bookPart Paz Rojas, Jos? Luis. et al. (2016). Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations. World Scientific Publishing. pp. 211-248 9789814749763 http://repositorio.educacionsuperior.gob.ec/handle/28000/5084 eng DOI;10.1142/9789814749763_0005 restrictedAccess http://creativecommons.org/licenses/by-nc-sa/3.0/ec/ pp. 211-248
institution SENESCYT
collection Repositorio SENESCYT
biblioteca Biblioteca Senescyt
language eng
format Libros
topic OPTICAL
MOLECULAR
SYSTEMS
DIPOLE
spellingShingle OPTICAL
MOLECULAR
SYSTEMS
DIPOLE
Paz Rojas, Jos? Luis
Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations
description The solvent effects over nonlinear optical properties of a two-level molecular system in presence of a classical electromagnetic field were modeled in this work. The collective effects proper of the thermal reservoir are modeled as a random Bohr frequency, whose manifestation is the broadening of the upper level according to a prescribed random function. A technique of work, based in the use of the cumulant expansions to obtain the average in the Fourier components associated with the coherence and populations, evaluated by the use of the Optical Stochastic Bloch Equations (OSBE), is employed. Analytical expressions for susceptibility, optical properties and non-degenerate Four-Wave Mixing (nd-FWM) signal intensity, were obtained. Numerical calculations were carried out to construct surfaces corresponding to these magnitudes as a function of the pump-probe frequency detuning, values of the permanent dipole moments (PDM), noise parameters and relationships between the longitudinal and transversal relaxation times. Our results show that it is necessary to neglect the Rotating-Wave approximation (RWA) in order to measure the effect of the permanent dipole moments and that the inclusion of these favors two-photon transitions over those with one-photon. In general, the effect of non-zero permanent dipole moments, are reflected in the appearance of new and more complex signals associated with new multiphoton processes.
author Paz Rojas, Jos? Luis
author_facet Paz Rojas, Jos? Luis
author_sort Paz Rojas, Jos? Luis
title Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations
title_short Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations
title_full Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations
title_fullStr Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations
title_full_unstemmed Nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations
title_sort nonlinear optical properties in molecular systems with non-zero permanent dipole moments in four-wave mixing under stochastic considerations
publishDate 2017
url http://repositorio.educacionsuperior.gob.ec/handle/28000/5084
_version_ 1634995311669673984
score 11,871979

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