Identification and tunable optical coherent control of transition-metal spins in silicon carbide
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-09-25 |
| Journal | npj Quantum Information |
| Authors | Tom Bosma, Gerrit J. J. Lof, Carmem M. Gilardoni, Olger V. Zwier, Freddie Hendriks |
| Institutions | Ghent University, Linkƶping University |
| Citations | 66 |
Abstract
Section titled āAbstractāAbstract Color centers in wide-bandgap semiconductors are attractive systems for quantum technologies since they can combine long-coherent electronic spin and bright optical properties. Several suitable centers have been identified, most famously the nitrogen-vacancy defect in diamond. However, integration in communication technology is hindered by the fact that their optical transitions lie outside telecom wavelength bands. Several transition-metal impurities in silicon carbide do emit at and near telecom wavelengths, but knowledge about their spin and optical properties is incomplete. We present all-optical identification and coherent control of molybdenum-impurity spins in silicon carbide with transitions at near-infrared wavelengths. Our results identify spin S = 1/2 for both the electronic ground and excited state, with highly anisotropic spin properties that we apply for implementing optical control of ground-state spin coherence. Our results show optical lifetimes of ~60 ns and inhomogeneous spin dephasing times of ~0.3 Ī¼ s, establishing relevance for quantum spin-photon interfacing.