Strong Coupling between Plasmonic Surface Lattice Resonance and Photonic Microcavity Modes

Shi, Yunjie; Liu, Wei; Liu, Shidi; Yang, Tianyu; Dong, Yuanhua; Sun, DeGui; Li, Guangyuan

doi:10.3390/photonics9020084

Cited by 5 publications

(1 citation statement)

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“…For example, by placing metal nanoparticles within or close to microcavities, which confine the electromagnetic field within a very small volume and allow large field enhancement, the localized fields around metal nanoparticles can be greatly enhanced [22], and the sensing properties of a localized plasmon sensor can be improved [23]. Quite recently, the authors of [24] proposed the strong coupling between the SLR and photonic Fabry-Pérot (F-P) resonances by placing a metal-insulator-metal nanopillar array within an F-P microcavity formed by a thin film and an air/SiO 2 interface. However, because of the low reflectance at the air/SiO 2 interface, the electric fields of the SLR are not enhanced.…”

Section: Introductionmentioning

confidence: 99%

Significant Near-Field Enhancement over Large Volumes around Metal Nanorods via Strong Coupling of Surface Lattice Resonances and Fabry–Pérot Resonance

et al. 2022

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Metal nanoparticles supporting plasmons are widely used to enhance electromagnetic fields, resulting in strong light–matter interactions at the nanoscale in a diverse range of applications. Recently, it has been shown that when metal nanorods are periodically arranged with proper lattice periods, surface lattice resonances (SLRs) can be excited and near fields can be greatly enhanced over extended volumes. In this work, we report significant near field enhancement over even larger volumes by placing the metal nanorod array within a Fabry–Pérot (F-P) microcavity. Simulation results show that by taking advantage of strong coupling between the SLR and the photonic F-P resonances, the electric field intensity of the bonding split mode can be enhanced by up to 1935 times, which is about three times of the enhancement of the SLR, and the greatly enhanced field can extend over most of the F-P microcavity. We further show that the F-P resonances of both odd and even orders can strongly couple to the SLR by varying the nanorods position from the middle of the microcavity. We expect that the proposed plasmonic-photonic coupling system will find promising applications in nanolasers, nonlinear optics and sensing.

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Section: Introductionmentioning

confidence: 99%