Multimode interference in a Kerr nonlinear material

Patricia Segonds, Lionel Canioni, W. Li +2 more

Garry E. Berkovic, E. Shvartsberg

Mostafa Sahrai, Ali Hamrah Gharamaleki

Seyyed Hossein Asadpour, Mostafa Sahrai, A. Soltani +1 more

张红军 张红军, Hongjun Zhang Hongjun Zhang, 钮月萍 +5 more

The Kerr nonlinearity of a left-handed material is analyzed in a four-level atomic system. It is shown that, due to the effect of quantum interference, a large enhanced Kerr nonlinearity accompanied by vanishing absorption can be realized via choosing appropriate parameters in this negative refraction atomic medium. It not only shows the large nonlinearity but also acts as the phase and amplitude compensating effects.

Sascha Wallentowitz, W. Vogel

Raman-type laser excitation of a trapped atom allows one to realize the quantum-mechanical counterpart of phenomena of nonlinear optics, such as Kerr-type nonlinearities, parametric amplification, and multimode mixing. Additionally, huge nonlinearities emerge from the interference of the atomic wave function with the laser waves. They lead to a partitioning of the phase space accompanied by a significantly different action of the time evolution in neighboring phase-space zones. For example, a nonlinearly modified coherent 'displacement' of the motional quantum state may induce strong amplitude squeezing and quantum interferences.