S. Savasta et R. Girlanda, Hyper-Raman scattering in semiconductors: A quantum optical process in thestrong-coupling regime, PHYS REV B, 59(23), 1999, pp. 15409-15421
We present a theory of hyper-Raman scattering in semiconductors. The theory
provides a microscopic description of this process intimately tied to the
quantization of the electromagnetic field. The exciton-photon coupling is t
reated nonperturbatively to include polariton effects and the Coulomb inter
action between electrons is treated beyond the Hartree-Fock approximation o
f semiconductor Bloch equations. The theory demonstrates the: role of the q
uantum-mechanical zero-point motion of excitons in the optical decay of the
virtually excited biexcitons into two final polaritons or a longitudinal e
xciton and a polariton. We calculate the steady state emission spectrum and
present numerical results for CuCl.