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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-8267
DTSTART:20230517T160000Z
DTEND:20230517T180000Z
DTSTAMP:20260413T182316Z
LAST-MODIFIED:20230418T181007Z
LOCATION:5310 Chamberlin
SUMMARY:Nanoscale metrology using the spin and charge states of single
  nitrogen vacancy centers in diamond\, Graduate Program Event\, Aedan 
 Gardill\, Physics Graduate Student
DESCRIPTION:The nitrogen-vacancy (NV) center in diamond has shown grea
 t success as a nanoscale sensor due to its long coherence times at roo
 m temperature\, its ability to be optically addressed\, its sensitivit
 y to a host of external fields\, and having technical and logistical a
 dvantages due to being naturally trapped within the diamond. They have
  been used in a broad range of applications\, including condensed matt
 er physics\, biology\, geographical science\, and commercial magnetome
 ters. In this thesis\, new nanoscale measurement techniques using sing
 le NV centers are presented that utilize their spin and charge states.
  First\, the spin relaxation dynamics of single NV centers in nanodiam
 onds are measured\, which sheds light on the electric noise spectral d
 ensity of these nanodiamonds. Additionally\, these measurements invest
 igate the sources that limit coherence times of NV centers in nanodiam
 onds. Second\, single NV centers are used to capture electrons release
 d from surrounding defects in diamond in a new measurement technique. 
 This allows us to gain new understanding of the charge dynamics of the
 se surrounding defects. Lastly\, a novel super-resolution technique is
  demonstrated with NV centers that uses the naturally formed Airy disk
  of light focused by a lens. This technique can be readily implemented
  in other confocal microscopes with little-to-no additional modificati
 ons.<br>\n<br>\nThe NV center-based measurement techniques introduced 
 in this thesis offer promising new measurement tools that could have l
 arge impacts in other research areas\, such as quantum computing. For 
 example\, the electric field sensing technique could be used to explor
 e the source of surface charge noise in materials used in superconduct
 ing qubits or semiconductor quantum dots. The technique using single N
 V centers to probe charge dynamics also expands our understanding of t
 he charge states of silicon vacancy centers in diamond\, which are pro
 mising defects for quantum networks. Moreover\, the demonstrated new s
 uper-resolution technique provides a gateway for other research groups
  to easily achieve super-resolution in their work and advance their re
 search.
URL:https://www.physics.wisc.edu/events/?id=8267
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