Electron spin resonance of nitrogen-vacancy centers in optically trapped nanodiamonds
Type of Work
Article
Date
8-21-2012
Journal Title
Proceedings of the National Academy of Sciences
Journal Title - Alternate
PNAS
Journal ISSN
1091-6490
Journal Volume
109
Journal Issue
34
First Page
13493
Last Page
13497
DOI
10.1073/pnas.1211311109
Abstract
Using an optical tweezers apparatus, we demonstrate three-dimensional control of nanodiamonds in solution with simultaneous readout of ground-state electron-spin resonance (ESR) transitions in an ensemble of diamond nitrogen-vacancy (NV) color centers. Despite the motion and random orientation of NV centers suspended in the optical trap, we observe distinct peaks in the measured ESR spectra qualitatively similar to the same measurement in bulk. Accounting for the random dynamics, we model the ESR spectra observed in an externally applied magnetic field to enable d.c. magnetometry in solution. We estimate the d.c. magnetic field sensitivity based on variations in ESR line shapes to be ~50 microTesla/Hz^1/2. This technique may provide a pathway for spin-based magnetic, electric, and thermal sensing in fluidic environments and biophysical systems inaccessible to existing scanning probe techniques.
Citation Information
Horowitz, Viva R.; Alemán, Benjamin J.; Christle, David J.; Cleland, Andrew N.; and Awschalom, David D., "Electron spin resonance of nitrogen-vacancy centers in optically trapped nanodiamonds" (2012). Hamilton Digital Commons.
https://digitalcommons.hamilton.edu/articles/363
Hamilton Areas of Study
Physics