title: Fiber-optic vectorial magnetic-field gradiometry by a spatiotemporal differential optical detection of magnetic resonance in nitrogen-vacancy centers in diamond.
abstract: Highly sensitive room-temperature vectorial magnetic-field gradiometry is demonstrated using optically detected magnetic resonance (ODMR) in fiber-coupled nitrogen-vacancy (NV) centers in diamond. With a bulk NV-diamond magnetometer coupled to a pair of optical fibers integrated with a microwave transmission line, the differential ODMR measurements are implemented in both space and time, with magnetic-field gradient measurements supplemented with differential ODMR signal detection in the time domain, allowing efficient noise cancellation and providing a sensitivity of magnetogradiometry at the level of 10-7nT/(nmHz1/2).
authors.forename: S M
authors.initials: SM
authors.lastname: Blakley
authors.forename: I V
authors.initials: IV
authors.lastname: Fedotov
authors.forename: L V
authors.initials: LV
authors.lastname: Amitonova
authors.forename: E E
authors.initials: EE
authors.lastname: Serebryannikov
authors.forename: H
authors.initials: H
authors.lastname: Perez
authors.forename: S Ya
authors.initials: SY
authors.lastname: Kilin
authors.forename: A M
authors.initials: AM
authors.lastname: Zheltikov