论文标题
通过在非热波导量子电动力学系统中耦合强度通过耦合强度来控制的单向反射性
Controlled unidirectional reflectionlessness by coupling strength in a non-Hermitian waveguide quantum electrodynamics system
论文作者
论文摘要
在波导量子电动力学系统中研究了单向反射的无反射性，该系统由腔和$λ$ -Type的三级量子点组成，该量子点耦合到一维等离子波引导。对于谐振和抗谐振耦合，得出并讨论了传播和反射系数的分析表达式。通过适当调节耦合强度，相位移位和拉比频率，在特殊点上观察到无向反射。在特殊点附近表现出单向相干的完美吸收。这些结果可能会在设计光子的量子设备（例如光学开关和单光子晶体管）中找到应用。
Unidirectional reflectionlessness is investigated in a waveguide quantum electrodynamics system that consists of a cavity and a $Λ$-type three-level quantum dot coupled to a one-dimensional plasmonic waveguide. Analytical expressions of transmission and reflection coefficients are derived and discussed for both resonant and off-resonant couplings. By appropriately modulating the coupling strength, phase shift and Rabi frequency, unidirectional reflectionlessness is observed at the exceptional points. And unidirectional coherent perfect absorption is exhibited at the vicinity of exceptional point. These results might find applications in designing quantum devices of photons, such as optical switches and single-photon transistors.
