Nonlinear optical effects during femtosecond superradiant emission generation in semiconductor laser structures.
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Vasilyev, P., Penty, R., & White, I. (2018). Nonlinear optical effects during femtosecond superradiant emission generation in semiconductor laser structures.. Optics express, 26 (20), 26156-26166. https://doi.org/10.1364/oe.26.026156
© 2018 Optical Society of America. 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.
External DOI: https://doi.org/10.1364/oe.26.026156
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285991