摘要
In recent years, most studies have focused on the perfect absorption and high-efficiency quantum memory of the onesided system, ignoring the characteristics of its optical switching contrast. Thus, the performance of all-optical switching and optical transistors is limited. Herein, we propose a localized surface plasmon(LSP) mode-assisted cavity QED system which consists of a Λ-shaped three-level quantum emitter(QE), a metal nanoparticle and a one-sided optical cavity with a fully reflected mirror. In this system, the QE coherently couples to the cavity and LSP mode respectively, which is manipulated by the control field. As a result, considerably high and stable switch contrast of 90% can be achievable due to the strong confined field of the LSP mode and perfect absorption of the optical medium. In addition, we obtain a power dependent effect between the control field and the transmitted frequency as a result of the converted dark state. We employ the Heisenberg–Langevin equation and numerical master equation formalisms to explain high switching, controllable output light and the dark state. Our system introduces an effective method to improve the performance of optical switches based on the one-sided system in quantum information storage and quantum communication.
作者
李晓苗
刘发民
李子更
朱虹燕
王帆
钟晓岚
Xiaomiao Li;Famin Liu;Zigeng Li;Hongyan Zhu;Fan Wang;Xiaolan Zhong(School of Physics,Beihang University,Beijing 100191,China)
基金
support from the National Natural Science Foundation of China (Grant Nos. 62075004 and 11804018)
the Beijing Natural Science Foundation (Grant No. 4212051)。