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首页> 外文期刊>Physical Review X >Pump-Power-Driven Mode Switching in a Microcavity Device and Its Relation to Bose-Einstein Condensation
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Pump-Power-Driven Mode Switching in a Microcavity Device and Its Relation to Bose-Einstein Condensation

机译：泵浦动力驱动模式切换微腔装置及其与Bose-Einstein冷凝的关系

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摘要

We investigate the switching of the coherent emission mode of a bimodal microcavity device, occurring when the pump power is varied. We compare experimental data to theoretical results and identify the underlying mechanism based on the competition between the effective gain, on the one hand, and the intermode kinetics, on the other. When the pumping is ramped up, above a threshold, the mode with the largest effective gain starts to emit coherent light, corresponding to lasing. In contrast, in the limit of strong pumping, it is the intermode kinetics that determines which mode acquires a large occupation and shows coherent emission. We point out that this latter mechanism is akin to the equilibrium Bose-Einstein condensation of massive bosons. Thus, the mode switching in our microcavity device can be viewed as a minimal instance of Bose-Einstein condensation of photons. Moreover, we show that the switching from one cavity mode to the other always occurs via an intermediate phase where both modes are emitting coherent light and that it is associated with both superthermal intensity fluctuations and strong anticorrelations between both modes.
机译：我们调查双峰微腔装置的相干发射模式的切换，当泵功率变化时发生。我们将实验数据与理论结果进行比较，并根据有效增益，一方面和Intermode动力学的竞争确定基础机制。当泵送升高时，高于阈值时，具有最大有效增益的模式开始发射相干光，对应于激光。相比之下，在强泵浦的极限中，Intermode动力学是确定哪种模式获取大职业并显示相干发射。我们指出，这种后一种机制类似于大规模玻色子的均衡培养 - 爱因斯坦凝结。因此，可以将在微腔装置中切换作为光子的Bose-Einstein冷凝的最小实例。此外，我们表明，从一个腔模式到另一个腔模式的切换总是通过中间阶段发生，其中两个模式都发出相干光并且它与两个模式之间的超高热强度波动和强硬的反向轴相关联。

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