Polarization Control of Radiation and Energy Flow in Dipole-Coupled Nanorings

• URL: http://arxiv.org/abs/2004.09861v1
• Date: Tue, 21 Apr 2020 09:38:57 GMT
• Title: Polarization Control of Radiation and Energy Flow in Dipole-Coupled Nanorings
• Authors: Julian Cremer, David Plankensteiner, Mariona Moreno-Cardoner, Laurin Ostermann, Helmut Ritsch
• Abstract summary: Collective optical excitations in sub-wavelength spaced quantum emitters exhibit extreme sub-radiance and field confinement. We show that energy shifts, radiative lifetimes, and emission patterns of excitons and biexcitons in such rings can be tailored via the orientation of the individual dipoles.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Collective optical excitations in dipole-coupled nanorings of sub-wavelength spaced quantum emitters exhibit extreme sub-radiance and field confinement facilitating an efficient and low-loss ring-to-ring energy transfer. We show that energy shifts, radiative lifetimes, and emission patterns of excitons and biexcitons in such rings can be tailored via the orientation of the individual dipoles. Tilting the polarization from perpendicular to tangential to the ring dramatically changes the lifetime of the symmetric exciton state from superradiance to subradiance with the radiated field acquiring orbital angular momentum. At a magic tilt angle all excitons are degenerate and the transport fidelity between two rings exhibits a minimum. Further simulations suggest that, for certain parameters, the decay decreases double-exponentially with the emitter's density. Disorder in the rings' structure can even enhance radiative lifetimes. The transport efficiency strongly depends on polarization and size, which we demonstrate by simulating a bio-inspired example of two rings with 9 and 16 dipoles as found in biological light harvesting complexes (LHC). The field distribution in the most superradiant state in a full LHC multi-ring structure shows tight sub-wavelength field confinement in the central ring, while long-lived subradiant states store energy in the outer rings.

Related papers

• Dissipative stabilization of maximal entanglement between non-identical emitters via two-photon excitation [49.1574468325115]
  Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement. We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
  arXiv  Detail & Related papers  (2023-06-09T16:49:55Z)
• Optical Properties of Concentric Nanorings of Quantum Emitters [0.0]
  A ring of sub-wavelength spaced dipole-coupled quantum emitters features extraordinary optical properties when compared to a one-dimensional chain or a random collection of emitters. One finds the emergence of extremely subradiant collective eigenmodes similar to an optical resonator. This creates collective excitations with significant contributions from all three rings as a vital ingredient for efficient and fast coherent inter-ring transport.
  arXiv  Detail & Related papers  (2023-01-18T19:45:06Z)
• Crossover from exciton polarons to trions in doped two-dimensional semiconductors at finite temperature [0.0]
  We study systematically the role of temperature in the optical response of doped two-dimensional semiconductors. By making use of a finite-temperature Fermi-polaron theory, we reveal a crossover from a quantum-degenerate regime with well-defined polaron quasiparticles to an incoherent regime at high temperature or low doping.
  arXiv  Detail & Related papers  (2022-12-12T00:09:12Z)
• Resolving Fock states near the Kerr-free point of a superconducting resonator [51.03394077656548]
  We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement) We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
  arXiv  Detail & Related papers  (2022-10-18T09:55:58Z)
• Engineering the Radiative Dynamics of Thermalized Excitons with Metal Interfaces [58.720142291102135]
  We analyze the emission properties of excitons in TMDCs near planar metal interfaces. We find suppression or enhancement of emission relative to the point dipole case by several orders of magnitude. nanoscale optical cavities are a viable pathway to generating long-lifetime exciton states in TMDCs.
  arXiv  Detail & Related papers  (2021-10-11T19:40:24Z)
• Fermi polaron laser in two-dimensional semiconductors [0.0]
  We study the relaxation dynamics of driven, two-dimensional semiconductors, where electrons dress optically pumped excitons to form Fermi-polaron branches. As the coherent peak is at the edge of the light-cone and not at the center, the many-body dressing of excitons can reduce the linewidth below the limit set by the exciton nonradiative lifetime.
  arXiv  Detail & Related papers  (2021-03-25T18:00:00Z)
• Nanoscale continuous quantum light sources based on driven dipole emitter arrays [0.0]
  Two-level emitters at distances smaller that the transition wavelength collectively scatter, absorb and emit photons. This should allow to implement nanoscale non-classical light sources via weak coherent illumination.
  arXiv  Detail & Related papers  (2021-03-03T14:09:37Z)
• Multimode-polariton superradiance via Floquet engineering [55.41644538483948]
  We consider an ensemble of ultracold bosonic atoms within a near-planar cavity, driven by a far detuned laser. We show that a strong, dispersive atom-photon coupling can be reached for many transverse cavity modes at once. The resulting Floquet polaritons involve a superposition of a set of cavity modes with a density of excitation of the atomic cloud.
  arXiv  Detail & Related papers  (2020-11-24T19:00:04Z)
• Efficient frequency-selective single-photon antennas based on a bio-inspired nano-scale atomic ring design with 9-fold symmetry [0.0]
  Quantum emitters in confined arrays exhibit geometry dependent collective dynamics. We show that by placing an extra resonant absorptive dipole at the ring center, such a structure becomes a highly efficient single-photon absorber.
  arXiv  Detail & Related papers  (2020-10-19T18:21:26Z)
• Collective radiation from distant emitters [63.391402501241195]
  We show that the spectrum of the radiated field exhibits non-Markovian features such as linewidth broadening beyond standard superradiance. We discuss a proof-of-concept implementation of our results in a superconducting circuit platform.
  arXiv  Detail & Related papers  (2020-06-22T19:03:52Z)
• Parallel dark soliton pair in a bistable 2D exciton-polariton superfluid [47.187609203210705]
  2D dark solitons are unstable and collapse into vortices due to snake instabilities. We demonstrate that a pair of dark solitons can be formed in the wake of an obstacle in a polariton flow resonantly supported by a homogeneous laser beam.
  arXiv  Detail & Related papers  (2020-03-25T13:52:22Z)

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.