arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1301.7612quant-ph
收藏

含时光腔中发射极的非指数自发发射动力学

Non-exponential spontaneous emission dynamics for emitters in a time-dependent optical cavity

Henri Thyrrestrup, Alex Hartsuiker, Jean-Michel Gérard, Willem L. Vos

摘要:

从理论上研究了动态光学微腔中自发发射的确定性时间控制效应。我们提出了一个新的范例,在光发射:我们设想一个合奏的两级发射器的环境中的局部密度的光学状态修改的时间尺度短于衰减时间。在量子电动力学的弱耦合区,建立了含时环境中二能级发射体激发态布居的速率方程模型。作为一个现实的实验系统,我们考虑发射器在半导体微腔,自由载流子激发开关。我们表明,短时间内增加的辐射衰减率耗尽的激发态,并大大增加了发射强度在开关时间。由此产生的随时间变化的自发发射显示了光子到达时间的分布,该分布强烈偏离通常的指数衰减:在开关事件期间自发发射光子的确定性突发。

英文摘要:

We have theoretically studied the effect of deterministic temporal control of spontaneous emission in a dynamic optical microcavity. We propose a new paradigm in light emission: we envision an ensemble of two-level emitters in an environment where the local density of optical states is modified on a time scale shorter than the decay time. A rate equation model is developed for the excited state population of two-level emitters in a time-dependent environment in the weak coupling regime in quantum electrodynamics. As a realistic experimental system, we consider emitters in a semiconductor microcavity that is switched by free-carrier excitation. We demonstrate that a short temporal increase of the radiative decay rate depletes the excited state and drastically increases the emission intensity during the switch time. The resulting time-dependent spontaneous emission shows a distribution of photon arrival times that strongly deviates from the usual exponential decay: A deterministic burst of photons is spontaneously emitted during the switch event.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑