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Resonant optical spectroscopy and coherent control of Cr4+ spin ensembles in SiC and GaN
University of Chicago, IL 60637 USA; Argonne National Lab, IL 60439 USA.
University of Chicago, IL 60637 USA.
University of Chicago, IL 60637 USA.
University of Chicago, IL 60637 USA.
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2017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 95, no 3, article id 035207Article in journal (Refereed) Published
Abstract [en]

Spins bound to point defects are increasingly viewed as an important resource for solid-state implementations of quantum information and spintronic technologies. In particular, there is a growing interest in the identification of new classes of defect spin that can be controlled optically. Here, we demonstrate ensemble optical spin polarization and optically detected magnetic resonance (ODMR) of the S = 1 electronic ground state of chromium (Cr4+) impurities in silicon carbide (SiC) and gallium nitride (GaN). Spin polarization is made possible by the narrow optical linewidths of these ensembles (amp;lt;8.5 GHz), which are similar in magnitude to the ground state zero-field spin splitting energies of the ions at liquid helium temperatures. This allows us to optically resolve individual spin sublevels within the ensembles at low magnetic fields using resonant excitation from a cavity-stabilized, narrow-line width laser. Additionally, these near-infrared emitters possess exceptionally weak phonon sidebands, ensuring that amp;gt;73% of the overall optical emission is contained with the defects zero-phonon lines. These characteristics make this semiconductor-based, transition metal impurity system a promising target for further study in the ongoing effort to integrate optically active quantum states within common optoelectronic materials.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2017. Vol. 95, no 3, article id 035207
National Category
Condensed Matter Physics
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URN: urn:nbn:se:liu:diva-134600DOI: 10.1103/PhysRevB.95.035207ISI: 000392280900004OAI: oai:DiVA.org:liu-134600DiVA: diva2:1076019
Note

Funding Agencies|U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division (LDRD program at Argonne National Laboratory); Air Force Office of Scientific Research [AFOSR FA9550-14-1-0231, AFOSR MURI FA9550-15-1-0029]; Army Research Office [W911NF-15-2-0058]; National Science Foundation [DMR-1306300]; Linkoping Linnaeus Initiative for Novel Functional Materials (LiLi-NFM) [VR 349-2006-176]; Knut and Alice Wallenberg Foundation [KAW 2013.0300]

Available from: 2017-02-21 Created: 2017-02-21 Last updated: 2017-11-29Bibliographically approved

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