Nonlocal study of optical second harmonic generation from a GaAs/AlGaAs quantum well subjected to a DC electric field

Ansheng Liu; Ole Keller

doi:10.1117/12.175711

11 May 1994 Nonlocal study of optical second harmonic generation from a GaAs/AlGaAs quantum well subjected to a DC electric field

Ansheng Liu, Ole Keller

Author Affiliations +

Proceedings Volume 2139, Quantum Well and Superlattice Physics V; (1994) https://doi.org/10.1117/12.175711
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

A microscopic local-field calculation of the infrared second-harmonic generation associated with intersubband transitions in a single GaAs/AlGaAs quantum-well structure subjected to an applied electric field is presented. Taking as a starting point a fundamental selfconsistent integral equation for the local field, the p-polarized first-harmonic fields inside the quantum well are calculated exactly. The result for the local-field calculation at the first-harmonic frequency is used to calculate the p-polarized second-harmonic local field. The conversion efficiency of the second-harmonic generation from the quantum well is determined. Numerical calculations of the frequency spectra of the second-harmonic powers are presented for different applied fields. The numerical results show that strong second-harmonic generation occurs in the vicinity of the resonance frequencies for the first- and second-harmonic local field inside the quantum well. The influence of the applied field on the optical second- harmonic generation is investigated. It is demonstrated that the presence of the dc bias leads to a blue-shift of the resonance frequencies in the SH energy reflection spectra stemming from the quantum-confined Stark effect, and that the maximum value of the SH power decreases when the applied field is increased.

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Ansheng Liu and Ole Keller "Nonlocal study of optical second harmonic generation from a GaAs/AlGaAs quantum well subjected to a DC electric field", Proc. SPIE 2139, Quantum Well and Superlattice Physics V, (11 May 1994); https://doi.org/10.1117/12.175711

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