Ultra-confined Propagating Exciton-Plasmon Polaritons Enabled by Cavity-Free Strong Coupling: Beating Plasmonic Trade-Offs.

Yipei Wang, Aoning Luo, Chunyan Zhu, Zhiyong Li, Xiaoqin Wu

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Article in Nanoscale research letters, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Yipei WangKey Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China. wangyp@cqu.edu.cn.

Aoning LuoKey Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China.

Chunyan ZhuKey Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China.

Zhiyong LiState Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China.

Xiaoqin WuKey Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China. xiaoqinwu@cqu.edu.cn.

Funding

Fundamental Research Funds for the Central Universities 2021CDJQY-046Fundamental Research Funds for the Central Universities 2022CDJXY-018Innovation Support Plan for Returned Overseas Scholars cx2021058National Natural Science Foundation of China 62005031National Natural Science Foundation of China 62005032

6 · The paper itself

Abstract

Hybrid coupling systems consisting of transition metal dichalcogenides (TMD) and plasmonic nanostructures have emerged as a promising platform to explore exciton-plasmon polaritons. However, the requisite cavity/resonator for strong coupling introduces extra complexities and challenges for waveguiding applications. Alternatively, plasmonic nano-waveguides can also be utilized to provide a non-resonant approach for strong coupling, while their utility is limited by the plasmonic confinement-loss and confinement-momentum trade-offs. Here, based on a cavity-free approach, we overcome these constraints by theoretically strong coupling of a monolayer TMD to a single metal nanowire, generating ultra-confined propagating exciton-plasmon polaritons (PEPPs) that beat the plasmonic trade-offs. By leveraging strong-coupling-induced reformations in energy distribution and combining favorable properties of surface plasmon polaritons (SPPs) and excitons, the generated PEPPs feature ultra-deep subwavelength confinement (down to 1-nm level with mode areas ~ 10

Indexed as

Exciton–plasmon polaritonsMetal nanowiresStrong couplingTransition metal dichalcogenidesWaveguiding

Identifiers

PMID36399213

DOI10.1186/s11671-022-03748-7

PMCPMC9674826

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.