Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D70: Quantum Sensing using Diamonds
3:00 PM–6:00 PM,
Monday, March 6, 2023
Room: Room 409
Sponsoring
Unit:
DQI
Chair: Gabriel Landi, University of Rochester
Abstract: D70.00001 : Multi-dimensional quantum spectroscopy
3:00 PM–3:12 PM
Presenter:
Konstantin Herb
(ETH Zurich)
Authors:
Konstantin Herb
(ETH Zurich)
John M Abendroth
(ETH Zurich)
Erika W Janitz
(ETH Zurich)
Laura A Völker
(ETH Zurich)
Christian L Degen
(ETH Zurich)
In this talk, we focus on the differences of nuclear spin environments of spins residing inside the diamond and on the surface of the diamond. For sparse 13C spin environments, the hyperfine coupling to the NV center is the dominant coupling while nuclear-nuclear couplings are minor. This is opposite for surface spins where the nuclear-nuclear coupling is dominant and presents the primary source for structure determination of macromolecules and molecular complexes covalently bound to the diamond surface.
We show newly developed spectroscopy sequences that allow to cover both regimes in multi-dimensional experiments. We show an improved localization of nuclear spins inside the diamond by encoding the nuclear spin position into frequencies only. This removes ambiguities found in past analysis schemes that used e.g., the line-shape and signal amplitude of a weak-measurement spectrum. Furthermore, we demonstrate a sequence for measuring the nuclear-nuclear couplings. We demonstrate the measurement of internuclear couplings of 13C spins inside the diamond at room temperature and give an outlook on the steps needed to combine our recent advances in surface preparation with these new sequences.
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