All-optical formation of coherent dark states of silicon-vacancy spins in diamond

Abstract

Spin impurities in diamond can be versatile tools for a wide range of solid-state-based quantum technologies, but finding spin impurities which offer sufficient quality in both photonic and spin properties remains a challenge for this pursuit. The silicon-vacancy center has recently attracted a lot of interest due to its spin-accessible optical transitions and the quality of its optical spectrum. Complementing these properties, spin coherence is essential for the suitability of this center as a spin-photon quantum interface. Here, we report all-optical generation of coherent superpositions of spin states in the ground state of a negatively charged silicon-vacancy center using coherent population trapping. Our measurements reveal a characteristic spin coherence time, T2*, exceeding 250 nanoseconds at 4 K. We further investigate the role of phonon-mediated coupling between orbital states as a source of irreversible decoherence. Our results indicate the feasibility of all-optical coherent control of silicon-vacancy spins using ultrafast laser pulses.

Additional data and analysis is available for download in PDF format at the publications section of http://www.amop.phy.cam.ac.uk/amop-ma

References in corpus (9)

• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Unconditional quantum teleportation between distant solid-state qubits
• Indistinguishable photons from separated silicon-vacancy centers in diamond
• Diamond Nanophotonics
• All-optical initialization, readout, and coherent preparation of single silicon-vacancy spins in diamond
• Coherent Population Trapping of Single Spins in Diamond Under Optical Excitation
• The negatively charged nitrogen-vacancy centre in diamond: the electronic solution
• Deterministic coupling of a single silicon-vacancy color center to a photonic crystal cavity in diamond
• Environment-assisted quantum control of a solid-state spin via coherent dark states

Cited by in corpus (15)

• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
• Tin-Vacancy Quantum Emitters in Diamond
• All-optical initialization, readout, and coherent preparation of single silicon-vacancy spins in diamond
• Electron-phonon processes of the silicon-vacancy centre in diamond
• Quantum many-body theory for electron spin decoherence in nanoscale nuclear spin baths
• Cavity quantum electrodynamics with color centers in diamond
• All-optical control of the silicon-vacancy spin in diamond at millikelvin temperatures
• Resonant optical spectroscopy and coherent control of Cr4+ spin ensembles in SiC and GaN
• Coherent control of a strongly driven silicon vacancy optical transition in diamond
• Coherence properties and quantum control of silicon vacancy color centers in diamond
• Simulation of topological phases with color center arrays in phononic crystals
• Dissipation-assisted preparation of steady spin-squeezed states of SiV centers
• Optical control protocols for high-fidelity spin rotations of single SiV${}^{-}$ and SnV${}^{-}$ centers in diamond
• Low-Temperature Spectroscopic Investigation of Lead-Vacancy Centers in Diamond Fabricated by High-Pressure and High-Temperature Treatment