94 citations · 349 across the 15 of their papers we have counts for
14 papers · 1 filter
Relaxation of a single defect spin by the low-frequency gyrotropic mode of a magnetic vortex
Jeremy Trimble, Brian Gould, F. Joseph Heremans +3
We excite the gyrotropic mode of a magnetic vortex and observe the resulting effect on the spin state of a nearby nitrogen-vacancy (NV) defect in diamond. Thin permalloy disks fabr…
Repeated deterministic defect-assisted switching of magnetic vortex core polarity
Mahdi Mehrnia, Jeremy Trimble, Olle Heinonen +1
Because of its stability, the polarity of a magnetic vortex core (VC) is a candidate for binary data storage. Switching can be accomplished, e.g, by driving the VC above a critical…
Nanowire magnetic force sensors fabricated by focused electron beam induced deposition
H. Mattiat, N. Rossi, B. Gross +6
We demonstrate the use of individual magnetic nanowires (NWs), grown by focused electron beam induced deposition (FEBID), as scanning magnetic force sensors. Measurements of their…
Cooperative energy transfer controls the spontaneous emission rate beyond field enhancement limits
Mohamed ElKabbash, Ermanno Miele, Ahmad K. Fumani +7
Quantum emitters located in proximity to a metal nanostructure individually transfer their energy via near-field excitation of surface plasmons. The energy transfer process increas…
Fast, nanoscale addressability of nitrogen-vacancy spins via coupling to a dynamic ferromagnetic vortex
Michael S. Wolf, Robert Badea, Jesse Berezovsky
The core of a ferromagnetic vortex domain creates a strong, localized magnetic field which can be manipulated on nanosecond timescales, providing a platform for addressing and cont…
Mapping the domain wall pinning landscape in ferromagnetic films
Robert Badea, Jesse Berezovsky
The propagation of domain walls in a ferromagnetic film is largely determined by domain wall pinning at defects in the material. In this letter we map the effective potential lands…
Magneto-Optical Imaging of Vortex Domain Deformation in Pinning Sites
Robert Badea, Johnathon A. Frey, Jesse Berezovsky
We use a sensitive magneto-optical microscopy technique to image the magnetization response of micron-scale ferromagnetic disks to changes in applied magnetic field. This different…
Homogeneous and inhomogeneous sources of optical transition broadening in room temperature CdSe/ZnS nanocrystal quantum dots
M. Wolf, J. Berezovsky
We perform photoluminescence excitation measurements on individual CdSe/ZnS nanocrystal quantum dots (NCQDs) at room temperature to study optical transition energies and broadening…
Spin pumping efficiency in room-temperature CdSe nanocrystal quantum dots
A. Khastehdel Fumani, J. Berezovsky
To understand and optimize optical spin initialization in room temperature CdSe nanocrystal quantum dots (NCQDs) we studied the dependence of the time-resolved Faraday rotation sig…
Imaging Universal Conductance Fluctuations in Graphene
Mario F. Borunda, Jesse Berezovsky, Robert M. Westervelt +1
We study conductance fluctuations (CF) and the sensitivity of the conductance to the motion of a single scatterer in two-dimensional massless Dirac systems. Our extensive numerical…
Imaging coherent transport in graphene (Part II): Probing weak localization
Jesse Berezovsky, Robert M Westervelt
Graphene has opened new avenues of research in quantum transport, with potential applications for coherent electronics. Coherent transport depends sensitively on scattering from mi…
Scaling of transverse nuclear magnetic relaxation due to magnetic nanoparticle aggregation
K. A. Brown, C. C. Vassiliou, D. Issadore +3
The aggregation of superparamagnetic iron oxide (SPIO) nanoparticles decreases the transverse nuclear magnetic resonance (NMR) relaxation time T2 of adjacent water molecules measur…
Spin dynamics and level structure of quantum-dot quantum wells
Jesse Berezovsky, Min Ouyang, Florian Meier +3
We have characterized CdS/CdSe/CdS quantum-dot quantum wells using time-resolved Faraday rotation (TRFR). The spin dynamics show that the electron g-factor varies as a function of…
Optically-patterned nuclear doughnuts in GaAs/MnAs heterostructures
J. Stephens, J. Berezovsky, R. K. Kawakami +2
We demonstrate a scheme for optically patterning nuclear spin polarization in semiconductor/ferromagnet heterostructures. A scanning time-resolved Kerr rotation microscope is used…