Electron–phonon processes of the silicon-vacancy centre in diamond

By K. D. Jahnke, Alp Sipahigil, Jan M. Binder, Marcus W. Doherty, M. Metsch, L. Rogers, N. Manson, Mikhail D. Lukin, Fedor Jelezko. 2014

282 citations recorded by the source corpus.

We investigate phonon induced electronic dynamics in the ground and excited states of the negatively charged silicon-vacancy ( SiV - ?> ) centre in diamond. Optical transition line widths, transition wavelength and excited state lifetimes are measured for the temperature range 4 K–350 K. The ground state orbital relaxation rates are measured using time-resolved fluorescence techniques. A microscopic model of the thermal broadening in the excited and ground states of the SiV - ?> centre is developed. A vibronic process involving single-phonon transitions is found to determine orbital relaxation rates for both the ground and the excited states at cryogenic temperatures. We discuss the implications of our findings for coherence of qubits in the ground states and propose methods to extend coherence times of SiV - ?> qubits.

Subfields: Atomic and Molecular Physics, and Optics, Geophysics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/8d4f826e7e8507f41b6bf600428751fa4ba5b6e3

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Citations in the corpus

An integrated diamond nanophotonics platform for quantum-optical networks (2016, background): “The Markovian approximation for the nonradiative relaxation rates (γuc, γcu, γd) is justified by recent measurements of dephasing (γd) and depolarization (γcu) induced by a thermal phonon bath (20).”
Materials challenges and opportunities for quantum computing hardware (2021, background): “Ongoing experimental efforts in the community to look for new color centers in diamond and silicon carbide primarily use ODMR and single-atom fluorescence imaging techniques ( 257 – 259 ).”
Ab Initio Magneto-Optical Spectrum of Group-IV Vacancy Color Centers in Diamond (2018, background): “[7,13]) is short because of the fast scattering of the electrons between the sublevels in the ground state mediated by the dynamic Jahn-Teller (DJT) effect even at T 1⁄4 4.”
Narrow-linewidth homogeneous optical emitters in diamond nanostructures via silicon ion implantation (2015, background): “Transition C is between the lowest energy ground and excited states which are also isolated from the phonon bath at low temperatures[29].”
A fiber-coupled diamond quantum nanophotonic interface (2016, unknown): “Combined with advances in quantum control of the diamond SiV center [57–59] and schemes for improved spin-coherence times [55], this platform opens up FIBER-COUPLED DIAMOND QUANTUM NANOPHOTONIC .”