Single germanium vacancy centres in nanodiamonds with bulk-like spectral stability

Abstract

Motivated by the success of group IV colour centres in nanodiamonds (NDs) for hybrid technology requiring a single photon source, we study single germanium-vacancy (GeV${}^{-}$) centres in NDs at room temperature with size rangingfrom 10 to 50 nm and with remarkable spectral properties. We characterize their zero-phonon line (ZPL), study their internal population dynamics and compare their emission properties in the framework of a three level model with intensity dependent de-shelving. Furthermore, we characterize their lifetime, polarization and brightness. We find amaximum photon emission count rate of 1.6 MHz at saturation. We also report a polarization visibility of 92% from the fluorescence light, which potentially makes GeV${}^{-}$ centres good candidates for quantum key distribution (QKD)requiring polarized single photons. We show that the GeV${}^{-}$ in NDs presented in this work have a comparable spectral stability compared to their bulk counterpart which is needed for future applications using NDs.

arXiv comment7 pages, 5 figures

References in corpus (30)

• Quantum Computing
• The nitrogen-vacancy colour centre in diamond
• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• A Diamond Nanowire Single Photon Antenna
• Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
• Single photon emission from silicon-vacancy centres in CVD-nano-diamonds on iridium
• Nonclassical radiation from diamond nanocrystals
• Deterministic coupling of a single nitrogen vacancy center to a photonic crystal cavity
• Tin-Vacancy Quantum Emitters in Diamond
• Quantum Nonlinear Optics with a Germanium-Vacancy Color Center in a Nanoscale Diamond Waveguide
• Multiple intrinsically identical single photon emitters in the solid-state
• Strain engineering of the silicon-vacancy center in diamond
• Electron-phonon processes of the silicon-vacancy centre in diamond
• Coherent control of the silicon-vacancy spin in diamond
• {\emph{Ab initio} magneto-optical spectrum of Group-IV -- Vacancy color centers in diamond
• Controlling the coherence of a diamond spin qubit through strain engineering
• Photophysics of single silicon vacancy centers in diamond: implications for single photon emission
• Lead-Related Quantum Emitters in Diamond
• Single-photon-emitting optical centers in diamond fabricated upon Sn implantation
• On-chip excitation of single germanium-vacancies in nanodiamonds embedded in plasmonic waveguides
• Narrowband fluorescent nanodiamonds produced from chemical vapor deposition films
• Cavity-enhanced single photon source based on the silicon vacancy center in diamond
• Photoluminescence of lead-related optical centers in single-crystal diamond
• Photoluminescence excitation spectroscopy of SiV${}^{-}$ and GeV${}^{-}$ color center in diamond
• Narrow-band single-photon emission in the near infrared for quantum key distribution
• Strongly inhomogeneous distribution of spectral properties of silicon-vacancy color centers in nanodiamonds
• Single SiV${}^{-}$ centers in low-strain nanodiamonds with bulk-like spectral properties and nano-manipulation capabilities
• Purcell-Enhanced Emission from Individual SiV${}^{-}$ Center in Nanodiamonds Coupled to a Si${}_3$N${}_4$-Based, Photonic Crystal Cavity
• Low temperature investigations and surface treatments of colloidal narrowband fluorescent nanodiamonds
• Varying temperature and silicon content in nanodiamond growth: effects on silicon-vacancy centers

Cited by in corpus (5)

• Coherent microwave, optical, and mechanical quantum control of spin qubits in diamond
• Enhanced Spectral Density of a Single Germanium Vacancy Center in a Nanodiamond by Cavity-Integration
• Sub-to-super-Poissonian photon statistics in cathodoluminescence of color center ensembles in isolated diamond crystals
• A comprehensive study of the effect of thermally induced surface terminations on nanodiamonds electrical properties
• Spectral emission dependence of tin-vacancy centers in diamond from thermal processing and chemical functionalization