Strong dipole-dipole interactions via enhanced light-matter coupling in composite nanofiber waveguides

Kritika Jain, Lewis Ruks, Fam le Kien, Thomas Busch
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Abstract

We study the interaction of emitters with a composite waveguide formed from two parallel optical nanofibers in regimes of experimental importance for atomic gases or solid-state emitters. Using the exact dyadic Green's function we comprehensively investigate the coupling efficiency and the fiber-induced Lamb shift accounting for variations in emitter positions and fiber configurations. This reveals coupling efficiencies and Purcell factors that are enhanced considerably beyond those using a single fiber waveguide, and robustness in the figures of merit. We finally investigate resonant dipole-dipole interactions and the generation of entanglement between two emitters mediated through the composite waveguide under excitation. We show that the concurrence can be enhanced for two fiber systems, such that entanglement may be present even in cases where it is zero for a single fiber. All-fiber systems are simple in construction and benefit from a wealth of existing telecommunications technologies, while enjoying strong couplings to emitters and offering interesting light-matter functionalities specific to slot waveguides.

Abstract Image

通过增强复合纳米纤维波导中的光-物质耦合实现强偶极子-偶极子相互作用
我们研究了发射器与由两条平行纳米光纤组成的复合波导在原子气体或固态发射器的重要实验条件下的相互作用。利用精确的二元格林函数,我们全面研究了耦合效率和光纤诱导的兰姆偏移,并考虑了发射器位置和光纤配置的变化。结果表明,耦合效率和珀塞尔系数比使用单根光纤波导时有了显著提高,而且性能指标非常稳定。最后,我们研究了共振偶极子-偶极子相互作用以及在激励下通过复合波导介导的两个发射器之间纠缠的产生。我们的研究表明,双光纤系统的并发性可以增强,因此即使在单根光纤的纠缠为零的情况下,纠缠也可能存在。全光纤系统结构简单,受益于大量现有的电信技术,同时与发射器具有很强的耦合性,并提供槽波导特有的有趣的光物质功能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
8.60
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