Enhanced Kerr nonlinearity in a negative refractive atomic medium
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.
Chinese Optics Letters•Jan 1, 2008•3 citations