S. Savasta et al., HYPER-RAMAN SCATTERING IN MICROCAVITY QUANTUM-WELLS - A QUANTUM OPTICAL PROCESS IN THE STRONG-COUPLING REGIME, Physica status solidi. a, Applied research, 164(1), 1997, pp. 85-89
We analyze the hyper Raman scattering process in a quantum well grown
inside a semiconductor microcavity and present a microscopic calculati
on of emission spectra as a function of excitation energy, detuning, a
nd angles. The exciton-photon coupling is treated non-perturbatively t
o include polariton effects and the Coulomb interaction between electr
ons is treated beyond the mean field approximation. The observation of
hyper Raman scattering in semiconductor microcavities would represent
an important step for the realization of non-classical optical states
based on excitons. We find that the polaritons emitted in this scatte
ring process are strongly correlated. This correlation, can be efficie
ntly transferred to output photons, resulting in emission of two corre
lated non-classical light beams. As a probe of the quantum correlation
we calculate the output spectrum of fluctuations in the intensity dif
ference of the two beams generated in the hyper Raman process.