Optical and microwave control of germanium-vacancy center spins in diamond
Open Access
- 18 August 2017
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 96 (8), 081201
- https://doi.org/10.1103/physrevb.96.081201
Abstract
A solid-state system combining a stable spin degree of freedom with an efficient optical interface is highly desirable as an element for integrated quantum-optical and quantum-information systems. We demonstrate a bright color center in diamond with excellent optical properties and controllable electronic spin states. Specifically, we carry out detailed optical spectroscopy of a germanium-vacancy () color center demonstrating optical spectral stability. Using an external magnetic field to lift the electronic spin degeneracy, we explore the spin degree of freedom as a controllable qubit. Spin polarization is achieved using optical pumping, and a spin relaxation time in excess of is demonstrated. We report resonant microwave control of spin transitions, and use this as a probe to measure the Autler-Townes effect in a microwave-optical double-resonance experiment. Superposition spin states were prepared using coherent population trapping, and a pure dephasing time of about was observed at a temperature of 2.0 K.
Keywords
Funding Information
- H2020 European Research Council
- Deutsche Forschungsgemeinschaft (FOR 1482, FOR 1493, SFBTR 21)
- Bundesministerium für Bildung und Forschung
- Oak Ridge Institute for Science and Education
- Defense Advanced Research Projects Agency
- Catholic University of America
- Army Research Laboratory
- Air Force Office of Scientific Research
- National Science Foundation
- Volkswagen Foundation
- Russian Science Foundation (14-27-00054)
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