Abstract

Valence-subband nonparabolicity is shown theoretically to lead to nonlinearities associated with terahertz third-harmonic generation in strained p-type quantum wells. For strained InAs quantum wells it is found that the corresponding value of χ3 can be as large as 10-12 m/V2. The predicted values of χ3 are in the range of those associated with intersubband transitions in the mid-infrared region of the spectrum.

© 2001 Optical Society of America

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