Spectral signatures of χ(5) processes in four-wave mixing of homogeneously broadened excitons

W. Langbein, T. Meier, Stephan W Koch, J. M. Hvam

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The influence of fifth-order coherences on the spectrally resolved four-wave mixing response of predominantly homogeneously broadened quasi-two-dimensional excitons is studied. Fifth-order signatures are discussed as a function of spectral position and excitation polarization. An exciton-biexciton beating for positive delay times is the dominant effect, which is pronounced at the exciton-biexciton transition for collinearly polarized excitation and at the exciton transition for cross-linearly polarized excitation. For negative delay times and collinearly polarized excitation a pronounced exciton-biexciton beating at the exciton resonance is observed that is vanishing for long negative delays owing to the faster dephasing in the two-exciton continuum compared with the bound biexciton state. These results are in qualitative agreement with microscopic model calculations that include the coherent dynamics of one- and two-exciton resonances up to the fifth order in the optical field.

Original languageEnglish (US)
Pages (from-to)1318-1325
Number of pages8
JournalJournal of the Optical Society of America B: Optical Physics
Volume18
Issue number9
StatePublished - 2001
Externally publishedYes

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spectral signatures
four-wave mixing
excitons
excitation
time lag
signatures
continuums
polarization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Spectral signatures of χ(5) processes in four-wave mixing of homogeneously broadened excitons. / Langbein, W.; Meier, T.; Koch, Stephan W; Hvam, J. M.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 18, No. 9, 2001, p. 1318-1325.

Research output: Contribution to journalArticle

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