论文标题
可调的非线性连贯的完美吸收和腔中的反射
Tunable nonlinear coherent perfect absorption and reflection in cavity QED
论文作者
论文摘要
我们建议并分析一种在三级$λ$ -ITYPE ATOM-CAVITY系统中实现可调连贯的完美吸收（CPA）和反射（CPR）的方案。通过相干耦合激光引起的EIT型干扰，该方案提供了一种新的方法，可以在两光子共振下在CPR附近获得可调的方法。通过不同的耦合强度，系统可以从线性CPA制度到非线性甚至可BISTABL的CPA制度而激发系统，而无需更改探针场的频率，在该探针场的频率上，该探针场的磁滞周期是可控制的。另外，可以将CPA机制转移到近乎CPR机制中，具有可控的原子相干性和由不一致的泵场诱导的线性吸收。我们的工作提出了一种对极端吸收（0％和100％）操纵的机制，该机制有可能应用于逻辑门和光学开关中，以进行相干的光学计算和通信。
We propose and analyze a scheme for realizing tunable coherent perfect absorption (CPA) and reflection (CPR) in a three-level $Λ$-type atom-cavity system. With EIT-type interference induced by a coherent coupling laser, the scheme provides a new method of attaining tunable near CPR at two-photon resonance. By different coupling strength, the system can be excited from linear CPA regime into nonlinear even bistable CPA regime without changing the frequency of the probe field, where the hysteresis cycle of the bistability is controllable. In addition, the CPA regime can be transferred into the near CPR regime with controllable atomic coherence and linear absorption induced by an incoherent pump field. Our work suggests a mechanism for manipulation on extreme absorption (0% and 100%), which can potentially be applied in logical gates and optical switches for coherent optical computing and communication.
