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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 5 — May. 5, 2006

Near-field microwave microscope and electron-spin-resonance detection: ruby crystal surface

Xiying Li, J. Adin Mann, Jr., and Massood Tabib-Azar  »View Author Affiliations

Applied Optics, Vol. 45, Issue 10, pp. 2191-2198 (2006)

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Microwave photons can image a surface by using near-field geometry with spatial resolution close to the nanometer-length scale. We detected electron-spin resonance (ESR) on ruby surfaces by using microwave photons at the S-band frequency ( 3.73   GHz ) . The spatial locations of the electron-spin centers were pinpointed with localized incident microwave photons generated by using evanescent microwave microscopy (EMM). We show that the EMM probe is capable of resolving 20,000 spin transitions, compared with the 10 10 minimum detectable spins of the conventional continuous-wave ESR spectrometer. This represents roughly a 6-order-of-magnitude enhancement in sensitivity. Our ultimate goal is to achieve the minimum detectable spin transition of a single electron and nanometer-level spatial resolution by using microfabricated atomic force microscopy–EMM probes.

© 2006 Optical Society of America

OCIS Codes
(240.6700) Optics at surfaces : Surfaces
(300.1030) Spectroscopy : Absorption
(300.6370) Spectroscopy : Spectroscopy, microwave

ToC Category:
Photon Correlation and Scattering

Original Manuscript: August 2, 2005
Revised Manuscript: December 2, 2005
Manuscript Accepted: December 7, 2005

Virtual Issues
Vol. 1, Iss. 5 Virtual Journal for Biomedical Optics

Xiying Li, J. Adin Mann, Jr., and Massood Tabib-Azar, "Near-field microwave microscope and electron-spin-resonance detection: ruby crystal surface," Appl. Opt. 45, 2191-2198 (2006)

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