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首页> 外文期刊>Physical review >Strongly coupled quantum dot-metal nanoparticle systems: Exciton-induced transparency, discontinuous response, and suppression as driven quantum oscillator effects
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Strongly coupled quantum dot-metal nanoparticle systems: Exciton-induced transparency, discontinuous response, and suppression as driven quantum oscillator effects

机译：强耦合的量子点-金属纳米粒子系统：激子诱导的透明性，不连续的响应和作为驱动的量子振荡器效应的抑制

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摘要

We probe the transition to bistability that exists in a hybrid metal nanoparticle and semiconductor quantum dot (SQD) system when they are strongly coupled. In particular, we see a discontinuous jump in the response of the system (in both the diagonal and off-diagonal density-matrix elements) and a SQD response that is highly suppressed above resonance in this transition region. This discontinuous response and suppression arise because the SQD acts as a driven (quantum) oscillator. The phase change at resonance drastically alters the hybrid response when crossing the resonance. The study of this transition region, the discontinuity, and the suppression phenomena provides different insights into understanding this system, predicts a more complicated behavior than previously thought and corrects earlier work where the transition region was absent.
机译：我们探讨了在牢固耦合时混合金属纳米粒子和半导体量子点（SQD）系统中存在的向双稳态的过渡。特别是，我们看到系统响应（在对角线和非对角线密度矩阵元素中）都出现了不连续的跳跃，并且在此过渡区域中，在共振之上，SQD响应得到了高度抑制。由于SQD充当驱动（量子）振荡器，因此出现了这种不连续的响应和抑制。当共振时，共振时的相位变化会极大地改变混合响应。对过渡区域，不连续性和抑制现象的研究为理解该系统提供了不同的见解，预测了比以前认为的更为复杂的行为，并纠正了缺少过渡区域的早期工作。

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