Photon echo induced by two-exciton coherence in a GaAs quantum well

Toshiharu Saiki, M. Kuwata-Gonokami, T. Matsusue, H. Sakaki

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Abstract

Excitonic nonlinearities in the weak-excitation limit condition are examined with time-integrated and time-resolved four-wave mixing (FWM). Below an excitation of 3×109 excitons/cm2, coherent third-order processes prevail. Echo-type signals are observed in parallel and perpendicular polarization configurations. The coherent process induced by the two-photon coherence of the two-exciton state is attributable to signals in the perpendicular configuration. The polarization dependences of a temporal profile and the intensity of FWM signals are well explained with third-order perturbational analysis that takes into account the two-exciton states and inhomogeneity.

Original languageEnglish
Pages (from-to)7817-7820
Number of pages4
JournalPhysical Review B
Volume49
Issue number11
DOIs
Publication statusPublished - 1994
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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