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χ(5) signature in the four-wave-mixing signal from a GaAs/Al0.3Ga0.7As superlattice

Title data

Bartels, G. ; Axt, Vollrath M. ; Victor, K. ; Stahl, Arne ; Leisching, P. ; Köhler, K.:
χ(5) signature in the four-wave-mixing signal from a GaAs/Al0.3Ga0.7As superlattice.
In: Physical Review B. Vol. 51 (1995) Issue 16, Rapid Communication . - 11217(R)-11220(R).
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.51.11217

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

We analyze coherent beats with a period corresponding to the biexciton binding energy in time-integrated four-wave-mixing experiments in a GaAs/Al0.3Ga0.7As superlattice at high excitation densities. Theoretical and experimental evidence is presented that the beating in the decay is a fifth-order process in the electric field, and therefore χ(5) contributions to the four-wave-mixing signal in the 2k2-k1 direction have to be considered for a qualitative interpretation of the measured data. In order to model the experiment we use a microscopic dynamic density-matrix theory in a real-space representation.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: fifth order optical response; semiconductors; density matrix theore; dynamics controlled truncation; non-linear optics; ultrafast dynamics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 16 Oct 2017 09:09
Last Modified: 17 Oct 2017 10:56
URI: https://eref.uni-bayreuth.de/id/eprint/40010