### Abstract

The influence of radiative coupling on the four-wave-mixing signals of multiple-quantum-well structures is investigated theoretically for excitation at the excitonic resonance. It is shown that amplitude and shape of the FWM signals depend strongly on the number of quantum wells N in the sample and on the periodicity of the structure. For a fixed delay time τ_{12}, the signal amplitude of a Bragg structure increases quadratically with N due to constructive interference as long as the radiative decay rate N_{γrad} is small compared to the inverse delay time τ_{12}^{-1}. For large N, if the enhanced radiative decay rate exceeds the inverse delay time, superradiant emission leads to a decrease of the observed signals with increasing N. The signals of anti-Bragg structures with an odd number of quantum wells decrease with increasing N due to destructive interference effects whereas anti-Bragg structures with an even number of quantum wells behave similarly to Bragg structures.

Original language | English (US) |
---|---|

Pages (from-to) | 19-22 |

Number of pages | 4 |

Journal | Physica Status Solidi (A) Applied Research |

Volume | 164 |

Issue number | 1 |

State | Published - 1997 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

### Cite this

*Physica Status Solidi (A) Applied Research*,

*164*(1), 19-22.

**Four-wave-mixing in radiatively coupled multiple-quantum-well structures : A model study.** / Haas, S.; Stroucken, T.; Knorr, A.; Jahnke, F.; Koch, Stephan W.

Research output: Contribution to journal › Article

*Physica Status Solidi (A) Applied Research*, vol. 164, no. 1, pp. 19-22.

}

TY - JOUR

T1 - Four-wave-mixing in radiatively coupled multiple-quantum-well structures

T2 - A model study

AU - Haas, S.

AU - Stroucken, T.

AU - Knorr, A.

AU - Jahnke, F.

AU - Koch, Stephan W

PY - 1997

Y1 - 1997

N2 - The influence of radiative coupling on the four-wave-mixing signals of multiple-quantum-well structures is investigated theoretically for excitation at the excitonic resonance. It is shown that amplitude and shape of the FWM signals depend strongly on the number of quantum wells N in the sample and on the periodicity of the structure. For a fixed delay time τ12, the signal amplitude of a Bragg structure increases quadratically with N due to constructive interference as long as the radiative decay rate Nγrad is small compared to the inverse delay time τ12-1. For large N, if the enhanced radiative decay rate exceeds the inverse delay time, superradiant emission leads to a decrease of the observed signals with increasing N. The signals of anti-Bragg structures with an odd number of quantum wells decrease with increasing N due to destructive interference effects whereas anti-Bragg structures with an even number of quantum wells behave similarly to Bragg structures.

AB - The influence of radiative coupling on the four-wave-mixing signals of multiple-quantum-well structures is investigated theoretically for excitation at the excitonic resonance. It is shown that amplitude and shape of the FWM signals depend strongly on the number of quantum wells N in the sample and on the periodicity of the structure. For a fixed delay time τ12, the signal amplitude of a Bragg structure increases quadratically with N due to constructive interference as long as the radiative decay rate Nγrad is small compared to the inverse delay time τ12-1. For large N, if the enhanced radiative decay rate exceeds the inverse delay time, superradiant emission leads to a decrease of the observed signals with increasing N. The signals of anti-Bragg structures with an odd number of quantum wells decrease with increasing N due to destructive interference effects whereas anti-Bragg structures with an even number of quantum wells behave similarly to Bragg structures.

UR - http://www.scopus.com/inward/record.url?scp=0031276254&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031276254&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031276254

VL - 164

SP - 19

EP - 22

JO - Physica Status Solidi (A) Applied Research

JF - Physica Status Solidi (A) Applied Research

SN - 0031-8965

IS - 1

ER -