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Plasmonic Enhanced EIT and Velocity Selective Optical Pumping Measurements with Atomic Vapor
ACS Photonics ( IF 6.5 ) Pub Date : 2018-01-25 00:00:00 , DOI: 10.1021/acsphotonics.7b01284
Eliran Talker 1 , Pankaj Arora 1 , Yefim Barash 1 , Liron Stern 1 , Uriel Levy 1
Affiliation  

In this work, we experimentally observe for the first time nanoscale plasmonic enhanced Electromagnetically Induced Transparency (EIT) and Velocity Selective Optical Pumping (VSOP) effects in miniaturized Integrated Quantum Plasmonic Device (IQPD) for D2 transitions in rubidium (Rb). Our device consists of a vapor cell integrated on top of a prism coated with a thin layer of metal. This configuration is known to allow efficient excitation of Surface Plasmon Resonance (SPR). The evanescent field of the surface plasmon mode interacts with the atomic media in close vicinity to the metal. In spite of the limited interaction length between SPR and Rb atoms, the signature of EIT along with VSOP signals could be clearly observed in our miniaturized IQPD under proper conditions of pump and probe intensities. A gradual decrease in the contrast of the plasmonic enhanced EIT and VSOP signals was observed as the excitation was detuned from the SPR critical angle, due to reduction in electromagnetic field enhancement, leading to a reduced interaction of the evanescent field with the atomic vapor media. Following the demonstration of these effects, we also present a detailed model revealing the mechanisms and the origin of plasmonic enhanced EIT and VSOP effects in our system. The model, which is based on the Bloch equations, is in good agreement with the observed experimental results. The obtained results are regarded as an important step in the quest for the realization of nanoscale quantum plasmonic effects and devices.

中文翻译:

具有原子蒸气的等离子体增强EIT和速度选择性光泵浦测量

在这项工作中,我们首次实验性地观察了D 2的小型集成量子等离子体激元器件(IQPD)中的纳米级等离激元增强的电磁感应透明度(EIT)和速度选择光泵浦(VSOP)效应。id(Rb)的跃迁。我们的设备由集成在覆盖有薄金属层的棱镜顶部的蒸气室组成。已知这种配置可以有效激发表面等离子体共振(SPR)。表面等离子体激元模式的e逝场与紧邻金属的原子介质相互作用。尽管SPR和Rb原子之间的相互作用长度有限,但在适当的泵浦和探针强度条件下,在我们的小型化IQPD中可以清楚地观察到EIT和VSOP信号的特征。当激发从SPR临界角失谐时,观察到等离子体增强的EIT和VSOP信号的对比度逐渐降低,这是由于电磁场增强的减少,导致了van逝场与原子蒸气介质的相互作用降低了。在演示了这些效应之后,我们还提供了一个详细的模型,揭示了系统中等离子体增强的EIT和VSOP效应的机理和起源。该模型基于Bloch方程,与观察到的实验结果非常吻合。获得的结果被认为是实现纳米级量子等离子体效应和器件的重要一步。
更新日期:2018-01-25
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