Optical and microwave control of germanium-vacancy center spins in diamond Academic Article uri icon

abstract

  • 2017 authors. Published by the American Physical Society. 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 (GeV) 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 20s 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 19ns was observed at a temperature of 2.0 K.

published proceedings

  • Physical Review B

altmetric score

  • 5.5

author list (cited authors)

  • Siyushev, P., Metsch, M. H., Ijaz, A., Binder, J. M., Bhaskar, M. K., Sukachev, D. D., ... Jelezko, F.

citation count

  • 105

complete list of authors

  • Siyushev, Petr||Metsch, Mathias H||Ijaz, Aroosa||Binder, Jan M||Bhaskar, Mihir K||Sukachev, Denis D||Sipahigil, Alp||Evans, Ruffin E||Nguyen, Christian T||Lukin, Mikhail D||Hemmer, Philip R||Palyanov, Yuri N||Kupriyanov, Igor N||Borzdov, Yuri M||Rogers, Lachlan J||Jelezko, Fedor

publication date

  • August 2017