Electrical Routing of Dipole Decay Between Radiative and Nonradiative Channels via Graphene Plexcitons
ADVANCED QUANTUM TECHNOLOGIES, vol.9, no.9, pp.1-9, 2026 (SCI-Expanded)
- Publication Type: Article / Article
- Volume: 9 Issue: 9
- Publication Date: 2026
- Doi Number: 10.1002/qute.70479
- Journal Name: ADVANCED QUANTUM TECHNOLOGIES
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
- Page Numbers: pp.1-9
- Keywords: decay-rate control, graphene, local density of optical states, nonradiative energy transfer, plexcitons, strong coupling
- Ataturk University Affiliated: Yes
Abstract
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.