Chinese Optics Letters, Volume. 6, Issue 5, 373(2008)
Enhanced Kerr nonlinearity in a negative refractive atomic medium
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.
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Hongjun Zhang, Yueping Niu, Hui Sun, Shangqing Gong. Enhanced Kerr nonlinearity in a negative refractive atomic medium[J]. Chinese Optics Letters, 2008, 6(5): 373