Relaxation times and symmetries in the nonlinear optical properties of a two-level system
| Autor: | César Costa Vera, José Luis Paz, Luis Lascano, J.R. León-Torres |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Thermal reservoir Stochastic process Random function Polarization (waves) 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Nonlinear system Amplitude Quantum mechanics 0103 physical sciences Homogeneous space Electrical and Electronic Engineering Physical and Theoretical Chemistry 010306 general physics Spectroscopy |
| Zdroj: | Optics Communications. 405:238-243 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2017.08.018 |
| Popis: | In this work we introduce a methodology for the determination of the longitudinal and transversal relaxation times in a two-level system using symmetry properties of the optical responses in the frequency space e Δ 1 , Δ 2 . Employing the density matrix formalism and a perturbative scheme for the incident field amplitudes in the Four-wave mixing spectroscopy, the nonlinear macroscopic polarization is determined. The collective effects of the thermal reservoir are modeled as a time dependent frequency, whose manifestation is the broadening of the upper level according to a prescribed random function. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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