论文标题

真空诱导的等离子纳米颗粒饱和度

Vacuum-Induced Saturation in Plasmonic Nanoparticles

论文作者

Stete, Felix, Koopman, Wouter, Henkel, Carsten, Benson, Oliver, Kewes, Günter, Bargheer, Matias

论文摘要

真空波动是量化场的基本特征。通常假定与真空波动相关的观察结果需要与其他影响隔离的系统。在这项工作中,我们证明了量子真空的效果已经可以在由湿化学制备的简单胶体纳米组件中发生。我们声称,零点处的电磁场波动饱和,在等离激元纳米谐振剂表面自组装的染料分子的吸收。为了使这种效果发生,不需要在等离子和激子之间达到强耦合方案。真空引起的饱和度(Visa)的这种有趣的作用是在简单的量子光学图片中讨论的,并通过将杂交金核染料壳纳米棒的光谱与电磁模拟进行了比较。

Vacuum fluctuations are a fundamental feature of quantized fields. It is usually assumed that observations connected to vacuum fluctuations require a system well isolated from other influences. In this work, we demonstrate that effects of the quantum vacuum can already occur in simple colloidal nano-assemblies prepared by wet chemistry. We claim that the electromagnetic field fluctuations at the zero-point level saturate the absorption of dye molecules self-assembled at the surface of plasmonic nano-resonators. For this effect to occur, reaching the strong coupling regime between the plasmons and excitons is not required. This intriguing effect of vacuum-induced saturation (VISA) is discussed within a simple quantum optics picture and demonstrated by comparing the optical spectra of hybrid gold-core dye-shell nanorods to electromagnetic simulations.

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