All-optical sensing of a single-molecule electron spin

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • A. O. Sushkov
  • N. Chisholm
  • I. Lovchinsky
  • M. Kubo
  • S. D. Bennett
  • D. Hunger
  • A. Akimov
  • R. L. Walsworth
  • H. Park
  • M. D. Lukin

Detail(s)

Original languageEnglish
Pages (from-to)6443-6448
Journal / PublicationNano Letters
Volume14
Issue number11
Online published31 Oct 2014
Publication statusPublished - 12 Nov 2014

Abstract

We demonstrate an all-optical method for magnetic sensing of individual molecules in ambient conditions at room temperature. Our approach is based on shallow nitrogen-vacancy (NV) centers near the surface of a diamond crystal, which we use to detect single paramagnetic molecules covalently attached to the diamond surface. The manipulation and readout of the NV centers is all-optical and provides a sensitive probe of the magnetic field fluctuations stemming from the dynamics of the electronic spins of the attached molecules. As a specific example, we demonstrate detection of a single paramagnetic molecule containing a gadolinium (Gd3+) ion. We confirm single-molecule resolution using optical fluorescence and atomic force microscopy to colocalize one NV center and one Gd3+-containing molecule. Possible applications include nanoscale and in vivo magnetic spectroscopy and imaging of individual molecules.

Research Area(s)

  • all-optical, diamond, magnetometry, Nitrogen vacancy center, single-molecule spin

Citation Format(s)

All-optical sensing of a single-molecule electron spin. / Sushkov, A. O.; Chisholm, N.; Lovchinsky, I.; Kubo, M.; Lo, P. K.; Bennett, S. D.; Hunger, D.; Akimov, A.; Walsworth, R. L.; Park, H.; Lukin, M. D.

In: Nano Letters, Vol. 14, No. 11, 12.11.2014, p. 6443-6448.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal