Enhanced Kerr nonlinearity in a negative refractive atomic medium

Nadia Boutabba, Zoya Rasheed, Hazrat Ali

Hamid Reza Hamedi, Seyyed Hossein Asadpour, Mostafa Sahrai

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.

Liang Hong, Yueping Niu, Li Deng +1 more

Nadia Boutabba

Abstract We discuss the feasibility of the Kerr effect in negative refractive index materials under magneto cross-coupling and reservoir interaction. The considered medium is a typical three-level atomic system where we derive both the refractive and the gain spectrum. The profiles are analyzed for a weak probe field, and for varying strengths of the strong control field. The considered scheme shows an enhancement of the Kerr nonlinearity which we attribute to the contribution of the electromagnetic components of the fields. For more realistic experimental conditions, we discuss the dependence of the Kerr effect on different thermal bath coupling constants.

Mubassir Khan, Amin Ur Rahman, Bakht Amin Bacha +2 more