Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session L39: Defect Spins in Semiconductors
11:15 AM–2:15 PM,
Wednesday, March 6, 2019
BCEC Room: 207
Sponsoring Units: GMAG DCMP DMP
Chair: Gregory Fuchs, Cornell University
Abstract: L39.00002 : Optically-Addressable Spins in Hexagonal Boron Nitride: Creation, Identification, and Characterization*
11:51 AM–12:27 PM
Annemarie L Exarhos
Annemarie L Exarhos
In this talk, I will describe the optical and magnetic properties of QEs in hBN characterized using confocal fluorescence microscopy on suspended hBN films. Qualitative similarities in excitation and emission polarization, spectral shape, and emission statistics are evident among QEs in hBN, even for large variations in emission energy . Significantly, a small percentage of observed QEs exhibit strongly anisotropic photoluminescence modulation in response to an applied magnetic field in ambient conditions . The magnetic-field-induced modulation is consistent with an electronic model featuring a spin-dependent inter-system crossing between triplet and singlet manifolds, suggesting that these defects host optically addressable spin states. This discovery enables the realization of spin-based quantum technologies with van der Waals heterostructures.
 Exarhos et al., ACS Nano 11, 3328 (2017).
 Exarhos et al., arXiv:1804.09061 [quant-ph] (2018). Nature Communications (accepted).
In collaboration with D. A. Hopper, R. N. Patel, R. R. Grote, A. Breitweiser, A. Alkauskas, M. W. Doherty, and L. C. Bassett.
*Work supported by the Army Research Office (W911NF-15-1-0589) and NSF MRSEC (DMR-1120901).
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