Two-photon absorption (TPA) of quantum-well structures is theoretically discussed with quasi-two-dimensional exciton effects included. The simple theory agrees with recent experimental results which show strongly anisotropic TPA spectra reflecting subband quantization. The TPA spectra in a static electric field normal to the quantum-well layers are also discussed. Substantial changes in the spectra are predicted.
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Akira Shimizu (1989) studied this question.
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