2025/10/22 by Hira Asif, Asif, Hira, Taner Tarık Aytas +5 · 1 voice
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Mechanical and Optical Resonators #Optics (physics.optics) #Plasmonic and Surface Plasmon Research #Quantum Physics (quant-ph) #Strong Light-Matter Interactions #physics.app-ph #physics.optics #quant-ph
paper · pdf · doi:10.48550/arxiv.2510.19396
openalex publication_date 2025/10/22 · arxiv published 2025/10/22 · arxiv updated 2025/10/22 · openalex created_date 2025/10/24 · openalex updated_date 2026/07/28
Active control of the radiative properties of quantum emitters through engineered light-matter interactions is a key challenge in nanophotonics and quantum optics. In this work, we demonstrate dynamic modulation of dipole's decay rate by exploiting the tunable plexcitonic modes (graphene plasmons and QD-excitons) in the strong coupling regime. By integrating a quantum dot inside a graphene spherical shell and tuning the local optical response of hybrid modes via voltage-bias, we achieve continuous and reversible control over the decay rate, leading to significant enhancement or suppression of dipole emission from near- to far-infrared regime. Furthermore, the plexcitonic peaks shows much sharper linewidths in contrast to bare graphene plasmons even in the off-resonant coupling which indicates higher sensitivity of the systems at tuned wavelengths. We demonstrate the phenomenon with the numerical solution of 3D Maxwell's equations using MNPBEM tool. Our approach demonstrate a versatile platform for programmable emission control and offer a promising pathway for developing reconfigurable quantum photonic devices, such as tunable single-photon sources and ultrafast optical switches.