Strong Exciton–Plasmon Coupling in MoS2 Coupled with Plasmonic Lattice,Nano Letters

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Strong Exciton–Plasmon Coupling in MoS2 Coupled with Plasmonic Lattice
Nano Letters ( IF 9.6 ) Pub Date : 2016-01-25 00:00:00 , DOI: 10.1021/acs.nanolett.5b04588
Wenjing Liu ₁ , Bumsu Lee ₁ , Carl H. Naylor ₁ , Ho-Seok Ee ₁ , Joohee Park ₁ , A. T. Charlie Johnson ₁ , Ritesh Agarwal ₁

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We demonstrate strong exciton–plasmon coupling in silver nanodisk arrays integrated with monolayer MoS₂ via angle-resolved reflectance microscopy spectra of the coupled system. Strong exciton–plasmon coupling is observed with the exciton–plasmon coupling strength up to 58 meV at 77 K, which also survives at room temperature. The strong coupling involves three types of resonances: MoS₂ excitons, localized surface plasmon resonances (LSPRs) of individual silver nanodisks and plasmonic lattice resonances of the nanodisk array. We show that the exciton–plasmon coupling strength, polariton composition, and dispersion can be effectively engineered by tuning the geometry of the plasmonic lattice, which makes the system promising for realizing novel two-dimensional plasmonic polaritonic devices.

中文翻译：

MoS _2中强激子-等离子体耦合与等离子体晶格耦合

我们通过耦合系统的角分辨反射显微镜光谱证明了与单层MoS ₂集成的银纳米盘阵列中的强激子-等离子体激元耦合。观察到强激子-等离激元耦合，在77 K时激子-等离激元耦合强度高达58 meV，在室温下也能幸存。强耦合涉及三种类型的共振：MoS ₂激子，单个银纳米盘的局部表面等离子体激元共振（LSPR）和纳米盘阵列的等离子体激元晶格共振。我们表明，通过调节等离激元晶格的几何形状，可以有效地设计激子-等离激元耦合强度，极化子组成和色散，这使得该系统有望实现新型的二维等离激元极化器件。

更新日期：2016-01-25

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