Kerr non-linearity and four-wave mixing in a double-cascade type four-level system of multiple quantum wells |
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Authors: | Wei Yan Xiaoming Li Chunchao Yu |
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Institution: | 1. Wuhan National Laboratory for Optoelectronics , Huazhong University of Science and Technology , Wuhan , 430074 , Hubei , P.R. China;2. Wuhan National Laboratory for Optoelectronics , Huazhong University of Science and Technology , Wuhan , 430074 , Hubei , P.R. China;3. College of Physical Science and Technology , Yangtze University , Jingzhou , 434023 , P.R. China |
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Abstract: | We study the non-linear optical response in multiple quantum wells structure with a double-cascade type four-level configuration based on excitons and biexcitons transitions. By analysing the Kerr non-linear effects, we obtain the slow, mutually matched group velocities and giant Kerr non-linearity of probe and signal fields. While when the signal (or probe) field is removed, the non-linear optical phenomenon four-wave mixing (FWM) originating from quantum interference is demonstrated. The FWM efficiency of the system study is about 50%. Such a semiconductor system is much more practical than its atomic counterpart because of its flexible design and the controllable interference strength. |
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Keywords: | Kerr non-linearity four-wave mixing multiple quantum wells |
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