Abstract
We have observed the generation of resonant second- and third-harmonic radiation near 100 μm in an AlGaAs/GaAs asymmetric coupled double-quantum well (ADQW) which approximates a two-level system. Resonant effects are studied by Stark tuning the system through the pump laser frequency. We measure much larger nonlinear susceptibilities than reported in structures optimized for nonlinear optics in the midinfrared, and we observe saturation of the second-harmonic generation. These measurements constitute the first resonant harmonic generation experiments in a heterostucture in which many-electron effects are important. We find that the second-order susceptibility can be modeled satisfactorily by single-electron perturbation theory when the intersubband spacing is replaced with the depolarization-shifted resonance frequency.
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© 1994 Springer Science+Business Media Dordrecht
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Heyman, J.N. et al. (1994). Resonant Harmonic Generation Near 100μm in an Asymmetric Double Quantum Well. In: Liu, H.C., Levine, B.F., Andersson, J.Y. (eds) Quantum Well Intersubband Transition Physics and Devices. NATO ASI Series, vol 270. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1144-7_40
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DOI: https://doi.org/10.1007/978-94-011-1144-7_40
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