Quantum Coherence of Rare-Earth Ions in Heterogeneous Photonic Interfaces

• URL: http://arxiv.org/abs/2511.19668v1
• Date: Mon, 24 Nov 2025 20:07:48 GMT
• Title: Quantum Coherence of Rare-Earth Ions in Heterogeneous Photonic Interfaces
• Authors: Henry C. Hammer, Hassan A. Bukhari, Yogendra Limdu, Brett M. Wasick, Christopher Rouleau, Michael E. Flatté, Durga Paudyal, Denis R. Candido, Ravitej Uppu,
• Abstract summary: Photoluminescence excitation spectroscopy reveals that Er$3+$ ions positioned at increasing distances from the III-V/oxide interface produce a systematic blue shift.<n>A compensating redshift and linewidth narrowing isolate the roles of oxygen-vacancy and gallium-diffusion noise.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Harnessing rare-earth ions in oxides for quantum networks requires integration with bright emitters in III-V semiconductors, but local disorder and interfacial noise limit their optical coherence. Here, we investigate the microscopic origins of the ensemble spectrum in Er$^{3+}$:TiO$_2$ epitaxial thin films on GaAs and GaSb substrates. Ab initio calculations combined with noise-Hamiltonian modeling and Monte Carlo simulations quantify the effects of interfacial and bulk spin noise and local strain on erbium crystal-field energies and inhomogeneous linewidths. Photoluminescence excitation spectroscopy reveals that Er$^{3+}$ ions positioned at increasing distances from the III-V/oxide interface produce a systematic blue shift of the $Y_1\rightarrow Z_1$ transition, consistent with strain relaxation predicted by theory. Thermal annealing produces a compensating redshift and linewidth narrowing, isolating the roles of oxygen-vacancy and gallium-diffusion noise. These results provide microscopic insight into disorder-driven decoherence, offering pathways for precise control of hybrid quantum systems for scalable quantum technologies.

Related papers

• A Hybrid Jump-Diffusion Model for Coherent Optical Control of Quantum Emitters in hBN [36.9794819679151]
  Hexagonal boron nitride (hBN) has emerged as a promising two-dimensional host for stable single-photon emission.<n>We present a simulation-based study of temperature-dependent spectral dynamics and optical coherence in a mechanically decoupled quantum emitter in hBN.
  arXiv  Detail & Related papers  (2026-01-28T13:23:28Z)
• Controlled growth of rare-earth-doped TiO$_{2}$ thin films on III-V semiconductors for hybrid quantum photonic interfaces [0.0]
  Quantum photonic networks require two distinct functionalities: bright single-photon sources and long-lived quantum memories.<n>Here we demonstrate low-temperature pulsed laser deposition of Er$3+$-doped TiO$_2$ thin films directly on GaAs and GaSb substrates.<n>Our results establish a materials platform for monolithically integrating rare-earth quantum memories with semiconductor photon sources.
  arXiv  Detail & Related papers  (2025-11-05T23:42:09Z)
• Rabi oscillations of a monolayer quantum emitter driven through its excited state [37.796192954999675]
  We study Rabi oscillations emerging in a WSe2 monolayer-based quantum dot.<n>The resulting exciton ground state population can be controlled by varying driving pulse area and detuning.<n>Our results pave the way towards the coherent control of quantum emitters in atomically thin semiconductors.
  arXiv  Detail & Related papers  (2025-10-27T11:18:38Z)
• Nonclassical Driven-Dissipative Dynamics in Collective Quantum Optics [51.56484100374058]
  We study ensembles of interacting quantum emitters coherently driven by a laser field and coupled to photonic structures.<n>We find that off-resonant virtual states may gain population through dissipation, redefining their role in open systems.<n>Our models address challenges like inhomogeneous broadening and decoherence, demonstrating the feasibility of harnessing cooperative light-matter effects for quantum technologies.
  arXiv  Detail & Related papers  (2025-09-12T20:01:55Z)
• Tripartite Entanglement in Multimode Cavity Quantum Electrodynamics [37.69303106863453]
  We numerically investigate the generation and dynamics of tripartite entanglement among qubits in multimode cavity quantum electrodynamics.<n>Our results hold promise for the development of entanglement-based quantum networking protocols and quantum memories.
  arXiv  Detail & Related papers  (2025-07-16T03:53:14Z)
• Cavity quantum electrodynamics with single perovskite quantum dots [0.0]
  We show the deterministic and reversible coupling of individual CsPbBr$_3$ perovskite quantum dots to a tunable, high-quality factor, low mode volume fiber-based Fabry-P'erot microcavity.<n>By tuning the cavity mode in resonance with the quantum dot emission, we observe up to a twofold increase in single photon emission rates.
  arXiv  Detail & Related papers  (2025-03-26T10:40:15Z)
• Check-probe spectroscopy of lifetime-limited emitters in bulk-grown silicon carbide [0.4711628883579317]
  We introduce a high-bandwidth check-probe' scheme to measure (laser-induced) spectral diffusion and ionisation rates. We demonstrate these methods on single V2 centers in commercially available bulk-grown 4H-silicon carbide. These results advance our understanding of spectral diffusion of quantum emitters in semiconductor materials, and may have applications for studying charge dynamics across other platforms.
  arXiv  Detail & Related papers  (2024-09-19T18:00:03Z)
• Site-Controlled Purcell-Induced Bright Single Photon Emitters in Hexagonal Boron Nitride [62.170141783047974]
  Single photon emitters hosted in hexagonal boron nitride (hBN) are essential building blocks for quantum photonic technologies that operate at room temperature. We experimentally demonstrate large-area arrays of plasmonic nanoresonators for Purcell-induced site-controlled SPEs. Our results offer arrays of bright, heterogeneously integrated quantum light sources, paving the way for robust and scalable quantum information systems.
  arXiv  Detail & Related papers  (2024-05-03T23:02:30Z)
• Multimode Ultrastrong Coupling in Three-Dimensional Photonic-Crystal Cavities [36.212701687134064]
  One-dimensional photonic-crystal cavities have uniform spatial profiles in the lateral plane. Fabrication challenges have hindered the achievement of strong coupling in 3D-PCCs. We report the realization of multimode ultrastrong coupling in a 3D-PCC at terahertz frequencies.
  arXiv  Detail & Related papers  (2023-08-23T21:14:01Z)
• Engineering the impact of phonon dephasing on the coherence of a WSe$_{2}$ single-photon source via cavity quantum electrodynamics [36.88715167286119]
  Emitter dephasing is one of the key issues in the performance of solid-state single photon sources. We show that it is possible to tune and engineer the coherence of photons emitted from a single WSe$$ monolayer dot via selectively coupling it to a spectral cavity resonance.
  arXiv  Detail & Related papers  (2023-07-13T16:41:06Z)
• Large Single-Phonon Optomechanical Coupling between Quantum Dots and Tightly Confined Surface Acoustic Waves in the Quantum Regime [1.7039969990048311]
  Small acoustic cavities with large zero-point motion are required for high efficiencies. We experimentally establish the feasibility of this platform through electro- and opto-mechanical characterization. We show conversion between microwave phonons and optical photons with sub-natural linewidths.
  arXiv  Detail & Related papers  (2022-05-03T02:53:01Z)
• Quantum correlations, entanglement spectrum and coherence of two-particle reduced density matrix in the Extended Hubbard Model [62.997667081978825]
  We study the ground state properties of the one-dimensional extended Hubbard model at half-filling. In particular, in the superconducting region, we obtain that the entanglement spectrum signals a transition between a dominant singlet (SS) to triplet (TS) pairing ordering in the system.
  arXiv  Detail & Related papers  (2021-10-29T21:02:24Z)
• Narrow inhomogeneous distribution of spin-active emitters in silicon carbide [1.4316595458440022]
  We show that silicon vacancy centres in semiconductor silicon carbide (SiC) provide a remarkably small natural distribution of their optical absorption/emission lines. Our results underline the potential of the CMOS-compatible SiC platform toward realizing networked quantum technology applications.
  arXiv  Detail & Related papers  (2021-03-10T14:56:17Z)
• Position-controlled quantum emitters with reproducible emission wavelength in hexagonal boron nitride [45.39825093917047]
  Single photon emitters (SPEs) in low-dimensional layered materials have recently gained a large interest owing to the auspicious perspectives of integration and extreme miniaturization. Here, we evidence SPEs in high purity synthetic hexagonal boron nitride (hBN) that can be activated by an electron beam at chosen locations. Our findings constitute an essential step towards the realization of top-down integrated devices based on identical quantum emitters in 2D materials.
  arXiv  Detail & Related papers  (2020-11-24T17:20:19Z)

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.