2019/11/27 by Franziska Wall, Wall, Franziska, Oliver Mey +5
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Mechanical and Optical Resonators #Molecular Junctions and Nanostructures #Optics (physics.optics) #Strong Light-Matter Interactions
paper · pdf · doi:10.48550/arxiv.1911.12438
openalex publication_date 2019/11/27 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
A theoretical variation between the two distinct light-matter coupling\nregimes, namely weak and strong coupling, becomes uniquely feasible in open\noptical Fabry-P 'erot microcavities with low mode volume, as discussed here. In\ncombination with monolayers of transition-metal dichalcogenides (TMDCs) such as\nWS2, which exhibits a large exciton oscillator strength and binding energy, the\nroom-temperature observation of hybrid bosonic quasiparticles, referred to as\nexciton-polaritons and characterized by a Rabi splitting, comes into reach. In\nthis context, our simulations using the transfer-matrix method show how to\ntailor and alter the coupling strength actively by varying the relative field\nstrength at the excitons' position - exploiting a tunable cavity length, a\ntransparent PMMA spacer layer and angle-dependencies of optical resonances.\nContinuously tunable coupling for future experiments is hereby proposed,\ncapable of real-time adjustable Rabi splitting as well as switching between the\ntwo coupling regimes. Being nearly independent of the chosen material, the\nsuggested structure could also be used in the context of light-matter-coupling\nexperiments with quantum dots, molecules or quantum wells. While the adjustable\npolariton energy levels could be utilized for polariton-chemistry or optical\nsensing, cavities that allow working at the exceptional point promise the\nexploration of topological properties of that point.\n