Nonlinear optical effects during femtosecond superradiant emission generation in semiconductor laser structures

Peter P. Vasil’Ev, Richard V. Penty, Ian H. White

Research output: Contribution to journalArticle

1 Citation (Scopus)


This paper presents theoretical and experimental studies of ultrabright internal second harmonic during femtosecond superradiant emission generation in multiple sections GaAs/AlGaAs laser structures at room temperature. Experimentally measured conversion efficiencies are by 1-2 orders of magnitude greater than expected. To explain this fact, a model based on one-dimensional nonlinear Maxwell curl equations without taking into consideration the slowly-varying envelope approximation has been developed. It has been demonstrated that strong transient periodic modulation of e-h density and refraction index dramatically affects the process of superradiance in semiconductor media and can explain the ultrastrong internal second harmonic generation.

Original languageEnglish
Pages (from-to)26156-26166
Number of pages11
JournalOptics Express
Issue number20
Early online date21 Sep 2018
Publication statusPublished - 1 Oct 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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