Abstract
Saturation behavior of inter‐subband optical transition in p‐type semiconductor quantum wells is examined theoretically. Carrier‐phonon scatterings are taken into account within the deformation‐potential approximation. Deviation of the hole distribution from thermal equilibrium due to optical pumping is calculated by solving coupled rate equations. Pump‐and‐probe absorption spectra are also studied and possible applications for light‐by‐light modulation are discussed.
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