Dynamic control of dipole decay rate via graphene plexcitons

• URL: http://arxiv.org/abs/2510.19396v1
• Date: Wed, 22 Oct 2025 09:15:49 GMT
• Title: Dynamic control of dipole decay rate via graphene plexcitons
• Authors: Hira Asif, Taner Tarik Aytas, Ramazan Sahin,
• Abstract summary: We demonstrate dynamic modulation of dipole's decay rate by exploiting the tunable plexcitonic modes in the strong coupling regime.<n>The plexcitonic peaks shows much sharper linewidths in contrast to bare graphene plasmons even in the off-resonant coupling.<n>Our approach demonstrate a versatile platform for programmable emission control and offer a promising pathway for developing reconfigurable quantum photonic devices.
• Score: 1.8925617030516928
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

Related papers

• Quantum dynamics of microwave photons in synthetic frequency dimension [15.026810874983171]
  Synthetic frequency dimension offers a powerful approach to simulate lattice models and control photon dynamics.<n>Here, we demonstrate quantum-state initialization and detection of single-photon evolutions within a synthetic frequency lattice.<n>Our results establish superconducting quantum circuits as a versatile platform for programmable Hamiltonians and synthetic lattices with flexible single-photon control.
  arXiv  Detail & Related papers  (2026-02-14T12:01:18Z)
• Integrated polarization-entangled photon source for wavelength-multiplexed quantum networks [49.82426139329382]
  We present a simple yet high-performance on-chip polarization-entangled photon-pair source on thin-film lithium niobate (TFLN)<n>Our device employs dual quasi-phase matching (D-QPM) that sequentially supports type-0 and type-I spontaneous parametric down-conversion in a single nanophotonic waveguide.<n>We realize wavelength-multiplexed entanglement distribution in a four-user quantum network deployed over metropolitan fiber links up to 50 km.
  arXiv  Detail & Related papers  (2025-11-27T18:30:01Z)
• Controlling emitter-field coupling in waveguides with a nanomechanical phase shifter [5.129407305640757]
  controllable coupling between a quantum dot and an optical mode in a waveguide using a nano-opto-electro-mechanical phase shifter and a photonic crystal mirror.<n>We observe a broadband tuning of the spontaneous emission rate and a modulation of the intensity emitted by the quantum dot in the waveguide.
  arXiv  Detail & Related papers  (2025-03-02T20:45:40Z)
• Continuous and Reversible Electrical Tuning of Fluorescent Decay Rate via Fano Resonance [2.3592914313389253]
  We demonstrate that the decay rates of a fluorescent molecule can be controlled by electrically shifting a transparency introduced by a Fano resonance.<n>An auxiliary quantum object (QO) located at the hotspot of a plasmonic nanoparticles suppresses plasmonic excitation at its level spacing omega_QO.<n>By shifting omega_QO via an applied voltage, we tune the radiative and nonradiative decay rates of the fluorescent molecule by up to two orders of magnitude.
  arXiv  Detail & Related papers  (2024-12-28T16:20:19Z)
• Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
  We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide. When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits. We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
  arXiv  Detail & Related papers  (2024-08-30T15:54:33Z)
• All-optical modulation with single-photons using electron avalanche [66.27103948750306]
  We demonstrate all-optical modulation enabled by electron avalanche process in silicon.<n>Our approach opens the possibility of gigahertz-speed, and potentially even faster, optical switching at the single-photon level.
  arXiv  Detail & Related papers  (2023-12-18T20:14:15Z)
• Coherent super- and subradiant dynamics between distant optical quantum emitters [5.240984067778683]
  Single emitter radiation can be tailored by the photonic environment. Multiple emitters fundamentally extends this picture following a "more is different" dictum. Subradiant states are particularly challenging to realize being highly sensitive to imperfections and decoherence.
  arXiv  Detail & Related papers  (2022-10-05T17:59:06Z)
• Ultra-long photonic quantum walks via spin-orbit metasurfaces [52.77024349608834]
  We report ultra-long photonic quantum walks across several hundred optical modes, obtained by propagating a light beam through very few closely-stacked liquid-crystal metasurfaces. With this setup we engineer quantum walks up to 320 discrete steps, far beyond state-of-the-art experiments.
  arXiv  Detail & Related papers  (2022-03-28T19:37:08Z)
• Superradiance in dynamically modulated Tavis-Cumming model with spectral disorder [62.997667081978825]
  Superradiance is the enhanced emission of photons from quantum emitters collectively coupling to the same optical mode. We study the interplay between superradiance and spectral disorder in a dynamically modulated Tavis-Cummings model.
  arXiv  Detail & Related papers  (2021-08-18T21:29:32Z)
• Quantum Floquet engineering with an exactly solvable tight-binding chain in a cavity [0.0]
  We provide an exactly solvable model given by a tight-binding chain coupled to a single cavity mode. We show that perturbative expansions in the light-matter coupling have to be taken with care and can easily lead to a false superradiant phase. In addition, we derive analytical expressions for the electronic single-particle spectral function and optical conductivity.
  arXiv  Detail & Related papers  (2021-07-26T14:33:20Z)
• Waveguide quantum electrodynamics: collective radiance and photon-photon correlations [151.77380156599398]
  Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters. We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
  arXiv  Detail & Related papers  (2021-03-11T17:49:52Z)
• Fast electrical modulation of strong near-field interactions between erbium emitters and graphene [42.60602838972598]
  We show fast, all-electrical modulation of the near-field interactions between a nanolayer of erbium emitters and graphene. We demonstrate strong interactions with a >1,000-fold increased decay rate for 25% of the emitters. This opens routes to quantum entanglement generation by collective plasmon emission or photon emission with controlled waveform.
  arXiv  Detail & Related papers  (2020-07-22T08:48:01Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.