Stimulated Coherent Processes

M. Katsuragawa, Jian Liang, Fam Le Kien +3 more

Summary form only given. Optical processes with strong-coupling and quantum-coherence are opening various new possibilities beyond the limit of conventional optical processes. Recently we have extended these optical processes to a condensed phase using solid hydrogen for stimulated Raman scattering (SRS) process. The essence of the work was the self-evolution of the strongly-coupled coherence using one excitation laser. In the present work we extend the above work to a more controllable scheme using two lasers. The point of the present report is the measurement of the SRS characteristics to the two-photon detuning. We show that the parametric SRS processes favorably occurs on the negative detuning side, in which the coherence can be evolved adiabatically to the anti-phased state coherence.

Aziz Kolkıran, G. S. Agarwal

We show how stimulated parametric processes can be employed in experiments on beyond the diffraction limit to overcome the problem of low visibility obtained by using spontaneous down conversion operating in the high gain regime. We further show enhancement of the count rate by several orders when stimulated parametric processes are used. Both the two photon counts and the visibility can be controlled by the phase of the stimulating coherent beam.

M. Pfeiffer, A. Lau

Biswajit Sen, Swapan Mandal, Jan Peřina

The initially prepared coherent state coupled to a third-order nonlinear medium is responsible for stimulated Raman and spontaneous Raman processes. By exploiting the analytical solutions of field operators for various modes, we investigate the quantum statistical properties for pure and two modes of the input coherent light responsible for stimulated Raman and spontaneous Raman processes. For spontaneous Raman processes the photons are unbunched for the pure and two-mode cases. By a suitable choice of phase, we obtain the bunching and antibunching of photons for stimulated Raman processes.

Jan‐Erik Rubensson