Plasmon Squeezing in Single-Molecule Junctions,Nano Letters

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Plasmon Squeezing in Single-Molecule Junctions
Nano Letters ( IF 9.6 ) Pub Date : 2022-11-30 , DOI: 10.1021/acs.nanolett.2c03371
Lei-Lei Nian ₁ , Tao Wang ₂ , Jing-Tao Lü ₂

Affiliation

Scanning tunneling microscope (STM)-induced luminescence provides an ideal platform for electrical generation and the atomic-scale manipulation of nonclassical states of light. However, despite its extreme importance in quantum technologies, squeezed light emission with reduced quantum fluctuations has hitherto not been demonstrated in such a platform. Here, we theoretically predict that the emitted light from the plasmon mode can be squeezed in an STM single molecular junction subject to an external laser drive. Going beyond the traditional paradigm that generates squeezing with the quadratic interaction of photons, our prediction explores the molecular coherence involved in an anharmonic energy spectrum of a coupled plasmon–molecule–exciton system. Furthermore, we show that, by selectively exciting the energy ladder, the squeezed plasmon can show either sub- or super-Poissonian statistical properties. We also demonstrate that, following the same principle, the molecular excitonic mode can be squeezed simultaneously.

中文翻译：

单分子连接处的等离子体挤压

扫描隧道显微镜 (STM) 诱导发光为发电和非经典光态的原子级操纵提供了理想的平台。然而，尽管它在量子技术中极其重要，但迄今为止尚未在这样的平台上证明具有减少的量子波动的压缩光发射。在这里，我们从理论上预测，等离子体模式发出的光可以在受外部激光驱动的 STM 单分子结中被压缩。超越通过光子的二次相互作用产生挤压的传统范式，我们的预测探索了耦合等离子体激元-分子-激子系统的非谐能谱中涉及的分子相干性。此外，我们表明，通过选择性地激发能量阶梯，压缩等离子体可以显示亚泊松或超泊松统计特性。我们还证明，遵循相同的原则，可以同时压缩分子激子模式。

更新日期：2022-11-30

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