原子相干性
双稳态
光学双稳态
光开关
可控性
物理
原子系统
连贯性(哲学赌博策略)
光学
激光器
光电子学
非线性光学
量子力学
应用数学
数学
作者
Haiqiang He,Bixuan Fan,Mei Xie
出处
期刊:Laser Physics
[IOP Publishing]
日期:2024-01-18
卷期号:34 (2): 025202-025202
标识
DOI:10.1088/1555-6611/ad1aa2
摘要
Abstract We theoretically investigate the atomic optical bistability (AOB) in a three-level Λ-type atomic system confined in a unidirectional optical ring cavity. The role of the intensity or detuning of the control field on AOB is explored, and results show that absorption, dispersion, and nonlinearity can be modified significantly by the control field due to quantum coherence and interference in multilevel atomic systems. Thus, tuning the intensity or detuning of the control field can manipulate the switch-up and switch-down thresholds, as well as the area of the bistable hysteresis loop. According to the controllability of AOB, we design various schemes to realize dynamical all-optical switching between the high and low outputs of two bistable curves for a fixed cavity input. In addition, dynamical all-optical memory switching can be implemented by adding a pulse sequence for the intensity or detuning of the control field. For appropriate parameters, such as the cooperative coefficient, the extinction ratio of the switching can be improved dramatically.
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