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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 19, Iss. 3 — Mar. 1, 2002
  • pp: 572–583

Theory of near-field magneto-optical imaging

Julian N. Walford, Juan-Antonio Porto, Rémi Carminati, and Jean-Jacques Greffet  »View Author Affiliations

JOSA A, Vol. 19, Issue 3, pp. 572-583 (2002)

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Scanning near-field optical microscopy has been recently applied to the imaging of magnetic samples. It was shown experimentally that an apertureless microscope suffers a substantial loss of resolution when used for magneto-optical imaging compared with that for conventional imaging. No such change is observed for aperture microscopes. We explain this observation by developing a model for the imaging process that incorporates the response of the probe. We calculate real observable properties such as the rotation of polarization at the detector or the circular dichroism signal and thus simulate magneto-optical images of a domain structure in cobalt for both aperture and apertureless microscopes.

© 2002 Optical Society of America

OCIS Codes
(180.5810) Microscopy : Scanning microscopy
(210.3820) Optical data storage : Magneto-optical materials
(260.1960) Physical optics : Diffraction theory
(260.2110) Physical optics : Electromagnetic optics
(350.5730) Other areas of optics : Resolution

Julian N. Walford, Juan-Antonio Porto, Rémi Carminati, and Jean-Jacques Greffet, "Theory of near-field magneto-optical imaging," J. Opt. Soc. Am. A 19, 572-583 (2002)

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