1983
DOI: 10.1002/jrs.1250140111
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Plasmon‐phonon coupling effects in picosecond Raman scattering of nonequilibrium semiconductor plasma

Abstract: The ultra-fast time-resolved Raman spectra of a highly photoexcited semiconductor plasma is calculated. Information is provided on the time-evolution of irreversible relaxation processes that develop in the system. It is described how plasmon-phonon interference effects in the Raman spectra are affected in the far-fromequilibrium state of the system. We used a theoretical method, based on a generalization of Gibbs algorithm to nonequilibrium situations, and a numerical analysis appropriate for the case of GaAs… Show more

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Cited by 15 publications
(7 citation statements)
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“…The latter can be calculated resorting to the response function theory for systems far from equilibrium (the case is quite similar to the calculation of the time-resolved Raman scattering cross section 95 , and obtained in terms of the nonequilibrium-thermodynamic Green functions, as we proceed to describe.…”
Section: Time Resolved Optical Properties In Hepsmentioning
confidence: 99%
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“…The latter can be calculated resorting to the response function theory for systems far from equilibrium (the case is quite similar to the calculation of the time-resolved Raman scattering cross section 95 , and obtained in terms of the nonequilibrium-thermodynamic Green functions, as we proceed to describe.…”
Section: Time Resolved Optical Properties In Hepsmentioning
confidence: 99%
“…The case of HEPS has already been discussed, and we simply recall that a first set of variables needs be the one composed of the carriers' density and energy, and the phonon population functions, together with the set of associated nonequilibrium thermodynamic variables that, as we have seen, can be interpreted as a reciprocal quasitemperature and quasi-chemical potentials of carriers, and reciprocal quasitemperatures of phonons, one for each mode. But in the situation we are considering we need to add, on the basis of the information provided by the experiment, the amplitudes of the LO-lattice vibrations and the carrier charge density; the former because it is clearly present in the experimental data (the oscillation in the reflectivity) and the latter because of the LO-phonon-plasma coupling (clearly present in Raman scattering experiments [95][96][97][98][99] ). Consequently the chosen basic set of dynamical quantities is…”
Section: Time Resolved Optical Properties In Hepsmentioning
confidence: 99%
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“…The formalism of this section was applied to the study of time-resolved Raman spectroscopy as described in Refs. [48,49].…”
Section: A Green Functions and The Fluctuation-dissipation Theoremmentioning
confidence: 99%
“…182 In this work the ultrafast timeresolved Raman spectra of a highly photoexcited semiconductor plasma is calculated. Information is provided on the time-evolution of irreversible relaxation processes that develop in the system.…”
Section: Theory and Experimentsmentioning
confidence: 99%