All-optical switching of continuous-variable entanglement in an absorption-suppressed plasmonic nanodimer

• URL: http://arxiv.org/abs/2606.30315v1
• Date: Mon, 29 Jun 2026 13:59:26 GMT
• Title: All-optical switching of continuous-variable entanglement in an absorption-suppressed plasmonic nanodimer
• Abstract summary: We show that a plasmonic nanorod dimer can satisfy all three requirements.<n>A phase-locked control polarization induces plasmonic refractive-index enhancement.<n>The resulting nonlinear plasmonic source operates in an absorption-suppressed regime.
• Score: 1.732435844754418
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A subwavelength quantum-photonic circuit element should simultaneously generate nonclassical light, suppress plasmonic loss, and remain dynamically tunable. We show that an orthogonal plasmonic nanorod dimer can satisfy all three requirements. A phase-locked control polarization induces plasmonic refractive-index enhancement, driving the probe response toward a near-zero-extinction regime while simultaneously tuning the local second-harmonic parametric interaction. The resulting nonlinear plasmonic source operates in an absorption-suppressed regime and enables all-optical control of quantum correlations. We demonstrate switchable logarithmic negativity and single-mode nonclassicality, establishing a route toward actively tunable quantum-plasmonic circuit elements operating well below the diffraction limit.

Related papers

• Cavity-Enhanced Collective Quantum Processing with Polarization-Encoded Qubits [0.26385121748044166]
  We introduce a cavity-enhanced optical architecture for collective quantum processing.<n> logical qubits are encoded in the polarization subspace of recirculating intracavity modes.
  arXiv  Detail & Related papers  (2026-05-11T12:36:54Z)
• Topological sensing of superfluid rotation using non-Hermitian optical dimers [3.7723788828505125]
  We study a non-Hermitian optical dimer whose parameters are renormalized by dispersive and dissipative backaction.<n>We propose a digital exceptional-point-based sensing scheme based on eigenmode permutation.
  arXiv  Detail & Related papers  (2026-01-08T09:14:31Z)
• Quantum Nonlinear Response of Emitter Lattices [42.17343824099138]
  We study the emergence of quantum nonlinearities in the optical response of lattices of two-level quantum emitters coherently driven by a laser.<n>For subwavelength lattice periods, where the system behaves as a quantum metasurface, we find that a resonant incident plane wave can populate excitonic Bloch states.<n>Closely related to resonance fluorescence, the far-field emission from the system in the strong-driving regime is dominated by a broadband background of photons.
  arXiv  Detail & Related papers  (2025-10-22T19:43:54Z)
• Optically tunable linear and nonlinear enhancement of index of refraction [2.3592914313389253]
  Control of optical properties of materials by tuning their refractive index can revolutionize the current state-of-the-art technology to manipulate light propagation in the high loss media.<n>We demonstrate active optical tuning of the plasmonic analog of textitenhancement of index of refraction (EIR) in both linear and nonlinear regimes using a quantum mechanical approach.
  arXiv  Detail & Related papers  (2025-06-21T12:39:40Z)
• 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)
• Strong coupling between a single-photon and a two-photon Fock state [44.00303450801203]
  We report an experimental observation of the strong coupling between a single-photon and a two-photon Fock state in an ultrastrongly-coupled circuit-QED system.<n>Results represent a key step towards a new regime of quantum nonlinear optics.
  arXiv  Detail & Related papers  (2024-01-05T10:23:14Z)
• Quantum vortices of strongly interacting photons [52.131490211964014]
  Vortices are hallmark of nontrivial dynamics in nonlinear physics. We report on the realization of quantum vortices resulting from a strong photon-photon interaction in a quantum nonlinear optical medium. For three photons, the formation of vortex lines and a central vortex ring attests to a genuine three-photon interaction.
  arXiv  Detail & Related papers  (2023-02-12T18:11:04Z)
• Tunable directional photon scattering from a pair of superconducting qubits [105.54048699217668]
  In the optical and microwave frequency ranges tunable directionality can be achieved by applying external magnetic fields. We demonstrate tunable directional scattering with just two transmon qubits coupled to a transmission line.
  arXiv  Detail & Related papers  (2022-05-06T15:21:44Z)
• Enhanced Cavity Optomechanics with Quantum-well Exciton Polaritons [0.0]
  microresonators embed quantum wells can host excitonic, optical and mechanical modes at once. We investigate the case where the system operates in the strong exciton-photon coupling regime. We predict an enhancement of polariton-phonon interactions by two orders of magnitude with respect to mere optomechanical coupling.
  arXiv  Detail & Related papers  (2022-02-24T13:26:19Z)
• Cavity-induced exciton localisation and polariton blockade in two-dimensional semiconductors coupled to an electromagnetic resonator [0.0]
  Recent experiments have demonstrated strong light-matter coupling between electromagnetic nanoresonators and pristine sheets of two-dimensional semiconductors. We present a first-principles microscopic quantum theory for the interaction between excitons in an infinite sheet of two-dimensional material and a localised electromagnetic resonator. We predict that polariton blockade due to nonlinear exciton-exciton interactions is well within reach for nanoresonators coupled to transition-metal dichalcogenides.
  arXiv  Detail & Related papers  (2021-03-26T14:16:34Z)
• Demonstration of dipolar-induced enhancement of parametric effects in polariton waveguides [40.96261204117952]
  Exciton-polaritons are hybrid light-matter excitations arising from the non-fluidative coupling of a photonic mode and an excitonic resonance. We show that dipolar interactions can be used to enhance parametric effects such as self-phase modulation in waveguide polaritons.
  arXiv  Detail & Related papers  (2020-05-22T20:45:31Z)

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.