Mitigating the Transition of SiV$^-$ in Diamond to an Optically Dark State

• URL: http://arxiv.org/abs/2512.06389v1
• Date: Sat, 06 Dec 2025 10:40:03 GMT
• Title: Mitigating the Transition of SiV$^-$ in Diamond to an Optically Dark State
• Authors: Manuel Rieger, Rubek Poudel, Tobias Waldmann, Lina M. Todenhagen, Stefan Kresta, Nori N. Chavira Leal, Viviana Villafañe, Martin S. Brandt, Kai Müller, Jonathan J. Finley,
• Abstract summary: Negatively charged silicon vacancy centers in diamond (SiV$-$) are promising for quantum photonic technologies.<n>We show that this unwanted change of charge state can be quickly reversed by the resonant laser itself in combination with static electric fields.<n>Our proposed electric-field-based stabilization scheme enhances deterministic charge state control in group-IV color centers.
• Score: 0.06266495696327323
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Negatively charged silicon vacancy centers in diamond (SiV$^-$) are promising for quantum photonic technologies. However, when subject to resonant optical excitation, they can inadvertently transfer into a zero-spin optically dark state. We show that this unwanted change of charge state can be quickly reversed by the resonant laser itself in combination with static electric fields. By defining interdigitated metallic contacts on the diamond surface, we increase the steady-state SiV$^-$ photoluminescence under resonant excitation by a factor $\ge3$ for most emitters, making it practically constant for certain individual emitters. We electrically activate single \sivs near the positively biased electrode, which are entirely dark without applying local electric fields. Using time-resolved 3-color experiments, we show that the resonant laser not only excites the SiV$^-$, but also creates free holes that convert SiV$^{2-}$ to SiV$^-$ on a timescale of milliseconds. Through analysis of several individual emitters, our results show that the degree of electrical charge state controllability differs between individual emitters, indicating that their local environment plays a key role. Our proposed electric-field-based stabilization scheme enhances deterministic charge state control in group-IV color centers and improves its understanding, offering a scalable path toward quantum applications such as entanglement generation and quantum key distribution.

Related papers

• Second-order Stark shifts exceeding 10$\,$GHz in electrically contacted SiV$^-$ centers in diamond [0.06266495696327323]
  Negatively charged silicon vacancy centers (SiV$-$) in diamond exhibit excellent spin coherence and optical properties.<n>We demonstrate electrical tuning of the SiV$-$ center zero-phonon lines using in-plane contacts to apply moderate electric fields up to 45$,$MV/m.<n>Our results demonstrate that large electrical Stark shifts can overcome the inhomogeneous distribution of transition frequencies.
  arXiv  Detail & Related papers  (2025-10-29T14:09:03Z)
• 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)
• Charge state transition of spectrally stabilized tin-vacancy centers in diamond [4.591710988381086]
  We study the spectral stability and charge state transition of tin-vacancy (SnV) centers in diamond.<n>We find that the instability occurs due to the charge state transition to a dark state.
  arXiv  Detail & Related papers  (2024-12-10T01:08:20Z)
• Lifetime-Limited and Tunable Emission from Charge-Stabilized Nickel Vacancy Centers in Diamond [0.0]
  We experimentally confirm the proposed geometric and electronic structure of the NiV defect in diamond. We characterize the optical properties and find a Debye-Waller factor of 0.62. This work provides a pathway towards coherent control of the NiV$-$ and its use as a spin qubit.
  arXiv  Detail & Related papers  (2024-11-11T18:16:15Z)
• Ultra-high strained diamond spin register with coherent optical link [45.40010446596688]
  Solid-state spin defects, such as color centers in diamond, are among the most promising candidates for scalable and integrated quantum technologies. We show that leveraging an ultra-high strained silicon-vacancy center inside a nanodiamond allows us to coherently and efficiently control its electron spin, while mitigating phonon-induced dephasing at liquid helium temperature. Our work paves the way for future integration of quantum network registers into conventional, well-established photonics and hybrid quantum communication systems.
  arXiv  Detail & Related papers  (2024-09-19T10:46:24Z)
• Rapid, in-situ neutralization of nitrogen- and silicon-vacancy centers in diamond using above-band-gap optical excitation [0.0]
  We demonstrate the use of deep-ultraviolet (DUV) radiation to dynamically neutralize nitrogen- (NV) and silicon-vacancy (SiV) centers. We first examine the conversion between the neutral and negatively charged NV states by correlating the variation of their respective spectra. We then observe the time dynamics of bleaching and recharging of negatively charged SiV$-$ centers and observe an 80% reduction in SiV$-$ photoluminescence within a single 100-$mu$s DUV pulse.
  arXiv  Detail & Related papers  (2024-08-29T21:43:33Z)
• Fast optoelectronic charge state conversion of silicon vacancies in diamond [0.0]
  Group IV vacancy color centers in diamond are promising spin-photon interfaces with strong potential for applications for photonic quantum technologies. We manipulate the charge state of silicon vacancy ensembles by combining luminescence and photo-current spectroscopy. We obtain new information on the defects that contribute to photo-conductivity, indicating the presence of substitutional nitrogen and divacancies.
  arXiv  Detail & Related papers  (2023-10-18T19:37:31Z)
• 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)
• A Quantum Repeater Platform based on Single SiV$^-$ Centers in Diamond with Cavity-Assisted, All-Optical Spin Access and Fast Coherent Driving [45.82374977939355]
  Quantum key distribution enables secure communication based on the principles of quantum mechanics. Quantum repeaters are required to establish large-scale quantum networks. We present an efficient spin-photon interface for quantum repeaters.
  arXiv  Detail & Related papers  (2022-10-28T14:33:24Z)
• Quantum control of nuclear spin qubits in a rapidly rotating diamond [62.997667081978825]
  Nuclear spins in certain solids couple weakly to their environment, making them attractive candidates for quantum information processing and inertial sensing. We demonstrate optical nuclear spin polarization and rapid quantum control of nuclear spins in a diamond physically rotating at $1,$kHz, faster than the nuclear spin coherence time. Our work liberates a previously inaccessible degree of freedom of the NV nuclear spin, unlocking new approaches to quantum control and rotation sensing.
  arXiv  Detail & Related papers  (2021-07-27T03:39:36Z)
• Open-cavity in closed-cycle cryostat as a quantum optics platform [47.50219326456544]
  We present a fiber-based open Fabry-P'erot cavity in a closed-cycle cryostat exhibiting ultra-high mechanical stability. This set of results manifests open-cavity in a closed-cycle cryostat as a versatile and powerful platform for low-temperature cavity QED experiments.
  arXiv  Detail & Related papers  (2021-03-09T18:41:48Z)
• Hybrid quantum photonics based on artificial atoms placed inside one hole of a photonic crystal cavity [47.187609203210705]
  Hybrid quantum photonics with SiV$-$-containing nanodiamonds inside one hole of a one-dimensional, free-standing, Si$_3$N$_4$-based photonic crystal cavity is presented. The resulting photon flux is increased by more than a factor of 14 as compared to free-space. Results mark an important step to realize quantum network nodes based on hybrid quantum photonics with SiV$-$- center in nanodiamonds.
  arXiv  Detail & Related papers  (2020-12-21T17:22:25Z)
• 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.