短光脉冲下双稳态极化子微柱中的随机和确定性开关
Stochastic and deterministic switches in a bistable polariton micropillar under short optical pulses
摘要：
半导体微腔中激子极化激元的光学双稳特性是数字光学器件的一个很有前途的平台。相干驱动极化激元的稳态可以通过适当幅度和相位的短脉冲在几十皮秒内切换。我们分析了极化激元的开关行为依赖于脉冲的幅度，相位和持续时间。开关被发现显着改变时，反向脉冲的持续时间变得可比的驱动场和极化激元共振之间的频率失谐。如果失谐量比极化激元线宽大，系统对初始条件变得非常敏感，因此可以作为快速随机数发生器。
英文摘要：
Optical bistability of exciton polaritons in semiconductor microcavities is a promising platform for digital optical devices. Steady states of coherently driven polaritons can be toggled in tens of picoseconds by a short external pulse of appropriate amplitude and phase. We have analyzed the switching behavior of polaritons depending on the pulse amplitude, phase, and duration. The switches are found to change dramatically when the inverse pulse duration becomes comparable to the frequency detuning between the driving field and polariton resonance. If the detuning is large compared to the polariton linewidth, the system becomes extremely sensitive to initial conditions and thus can serve as a fast random-number generator.
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