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- Kim, Dai-Sik
- Nano Optics Group
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UNUSUALLY SLOW TEMPORAL EVOLUTION OF FEMTOSECOND 4-WAVE-MIXING SIGNALS IN INTRINSIC GAAS QUANTUM-WELLS - DIRECT EVIDENCE FOR THE DOMINANCE OF INTERACTION EFFECTS
- Author(s)
- KIM, DS, SHAH, J, DAMEN, TC, SCHAFER, W, JAHNKE, F, SCHMITTRINK, S, KOHLER, K
- Issued Date
- 1992-11
- Citation
- PHYSICAL REVIEW LETTERS, v.69, no.18, pp.2725 - 2728
- Abstract
- Four-wave-mixing signals from excitons in high-quality GaAs quantum wells show an unusually slow temporal evolution, in stark contrast to the behavior expected for a noninteracting two-level system. We show that Coulomb interaction effects, generally neglected in the analyses of four-wave-mixing experiments, dominate the signals by 2 orders of magnitude. Numerical calculations based on extended optical Block equations for semiconductors provide good qualitative agreement with the data.
- Publisher
- AMER PHYSICAL SOC
- ISSN
- 0031-9007
- Keyword
- PHOTON-ECHOES, RELAXATION, EXCITONS
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