Pj. Harshman et al., STRONG-FIELD THEORY OF LOW-LOSS OPTICAL SWITCHING AND 3-WAVE MIXING IN A SEMICONDUCTOR QUANTUM-WELL, IEEE journal of quantum electronics, 30(10), 1994, pp. 2297-2303
A density matrix analysis based on radiative renormalization predicts
significant changes in band-edge absorption, index of refraction, and
three-wave-mixing susceptibility in a quantum well when two conduction
subbands are strongly coupled by an electromagnetic field.