Identification of a telecom wavelength single photon emitter in silicon

Abstract

We identify the exact microscopic structure of the G photoluminescence center in silicon by first principles calculations with including a self-consistent many-body perturbation method, which is a telecommunication wavelength single photon source. The defect constitutes of ${\text{C}}_{\text{s}}{\text{C}}_{\text{i}}$ carbon impurities in its ${\text{C}}_{\text{s}}-{\text{Si}}_{\text{i}}-{\text{C}}_{\text{s}}$ configuration in the neutral charge state, where $s$ and $i$ stand for the respective substitutional and interstitial positions in the Si lattice. We reveal that the observed fine structure of its optical signals originates from the athermal rotational reorientation of the defect. We attribute the monoclinic symmetry reported in optically detected magnetic resonance measurements to the reduced tunneling rate at very low temperatures. We discuss the thermally activated motional averaging of the defect properties and the nature of the qubit state.

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References in corpus (5)

• Electron-phonon processes of the silicon-vacancy centre in diamond
• State-selective intersystem crossing in nitrogen-vacancy centers
• Engineering telecom single-photon emitters in silicon for scalable quantum photonics
• Optical properties of an ensemble of G-centers in silicon
• Theoretical unification of hybrid-DFT and DFT+U methods for the treatment of localized orbitals

Cited by in corpus (7)

• Wafer-scale nanofabrication of telecom single-photon emitters in silicon
• Individually Addressable and Spectrally Programmable Artificial Atoms in Silicon Photonics
• All-silicon quantum light source by embedding an atomic emissive center in a nanophotonic cavity
• Cavity-enhanced zero-phonon emission from an ensemble of G centers in a silicon-on-insulator microring
• Effect of Localization on Photoluminescence and Zero-Field Splitting of Silicon Color Centers
• A telecom O-band emitter in diamond
• Single G centers in silicon fabricated by co-implantation with carbon and proton