Abstract
In a self-consistent multicomponent envelope function approach, we showed that χxxx(2) component of the second-harmonic susceptibility tensor of a symmetric p-type quantum well (QW) exists, because of the valence-band mixing at nonzero values of the in-plane wave vector. For a highly doped narrow GaAs/Al0.3Ga0.7As QW, our calculation indicates that at low temperatures a large value (∼10−7 m/V) of χxxx(2) can be achieved in the far-infrared frequency range without satisfying double resonance conditions. This value is comparable to the experimentally observed value of χzzz(2) in n-type asymmetric QW structures.
Published Version
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