Strong Coupling between a Quasi-single Molecule and a Plasmonic Cavity in the Trapping System

Abstract

We theoretically investigate the strong coupling phenomenon between a quasi-single molecule and a plasmonic cavity based on the blue-detuned trapping system. The trapping system is made up of a metallic nanohole array. A finite-difference time-domain method is employed to simulate the system, and the molecule is treated as a dipole in simulations. By calculating the electromagnetic field distributions, we obtain the best position for trapping a molecule, and we get the strong coupling phenomenon that there are two splitting peaks in the transmission spectrum when the molecule is trapped in the structure, while only one peak is observed in the one without the molecule. We also find that only when the molecule polarization parallels to the incident light wave vector can we observe a strong coupling phenomenon.

Quantum nanophotonic and nanoplasmonic sensing: towards quantum optical bioscience laboratories on chip

“…Computational methods are very useful for studying strong coupling in plasmon-emitter systems and can be used to accelerate research in this field. Classical electromagnetism simulations, using finite-difference time-domain methods or finite element methods, have been used to predict and optimize plasmonic-emitter configurations that would lead to strong coupling before doing experiments [313][314][315]. The strong coupling regime has also been explored with ab initio computational methods, which model the many-electron interactions of the system.…”

Recent advances in plasmonic nanocavities for single-molecule spectroscopy

“…Thus, plasmonic nanocavities provide a powerful solution for reducing effective mode volumes and achieve, at the subnanometer scale, spatial control of the coupling with a single molecule in close proximity. 12,13 Conning light to a cavity is then used to enhance the interaction between the optical eld and low dimensional materials, including small molecules, 14 2D materials, 15 quantum dots, 16 nanoparticles 17,18 or quantum emitters 5 passing through or diffusing within the cavity.…”

Dynamics of Spin‐Dependent Polariton–Polariton Interactions in Two‐Dimensional Layered Halide Organic Perovskite Microcavities

“…When matter strongly couples to electromagnetic waves, new quasiparticles called polaritons can emerge, in which the excitation energy can be coherent exchange between the two oscillators, leading to a vacuum Rabi splitting. [1][2][3][4][5][6] Typically, strong coupled hybrid states can be formed by placing materials into an optical microcavity, as a consequence, microcavity polaritons with half matter and half-light nature are potential candidates for DOI: 10.1002/lpor.202200176 optoelectronic devices. First, originating from the light component, fascinating properties have been observed in microcavity polaritons, such as smaller effective mass and faster propagation velocity.…”