Catalogo Articoli (Spogli Riviste)
OPAC HELP
Titolo: 4WAVEMIXING THEORY BEYOND THE SEMICONDUCTOR BLOCH EQUATIONS
Autore: AXT VM; STAHL A; MAYER EJ; BOLIVAR PH; NUSSE S; PLOOG K; KOHLER K;
 Indirizzi:
 RHEIN WESTFAL TH AACHEN,INST THEORET PHYS B,PHYS ZENTRUM SOMMERFELDSTR D52074 AACHEN GERMANY MAX PLANCK INST FESTKORPERFORSCH D70569 STUTTGART GERMANY PAUL DRUDE INST FESTKORPERELEKTR D10117 BERLIN GERMANY RHEIN WESTFAL TH AACHEN,INST HALBLEITERTECH 2 D52074 AACHEN GERMANY FRAUNHOFER INST APPL SOLID STATE PHYS D79108 FREIBURG GERMANY
 Titolo Testata:
 Physica status solidi. b, Basic research
fascicolo: 1,
volume: 188,
anno: 1995,
pagine: 447  456
 SICI:
 03701972(1995)188:1<447:4TBTSB>2.0.ZU;2L
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 QUANTUMWELLS; POLARIZATION DEPENDENCE; EXCITONS;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 11
 Recensione:
 Indirizzi per estratti:



 Citazione:
 V.M. Axt et al., "4WAVEMIXING THEORY BEYOND THE SEMICONDUCTOR BLOCH EQUATIONS", Physica status solidi. b, Basic research, 188(1), 1995, pp. 447456
Abstract
Fourwavemixing (FWM) experiments using a dynamical density matrix model of the semiconductor band edge are discussed. Higherorder correlation functions are retained which are neglected in the commonly used RPA treatment leading to the semiconductor Bloch equations. In order to terminate the hierarchy of the equations of motion for the higherorder density matrices systematically a truncation scheme controlled by orders in the driving field is applied. For any prescribed order n in the exciting field a closed set of equations is obtained from which the dielectric response up to order n can be calculated exactly. In addition it turns out that in a coherently driven system part of the remaining density matrices become redundant and can be eliminated. Fourwavemixing experiments are dominated by thirdorder contributions. Applying the abovedescribed results one ends up with only two functions inthis case. These are the excitonic and the biexcitonic transition densities. As an application of our method the example of a GaAs single quantum well is studied. Two pulses with finite lengths are assumed such that both heavyacid lighthole excitons are excited. The influence of the biexciton contribution on the polarization properties of the FWM signal is analyzed and compared with experimental results.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 14:38:03