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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 18, Iss. 5 — May. 1, 2001
  • pp: 698–705

Near-field optical study of selective photomodification of fractal aggregates

W. David Bragg, Vadim A. Markel, Won-Tae Kim, Katyayani Banerjee, Marvin R. Young, Jane G. Zhu, Robert L. Armstrong, Vladimir M. Shalaev, Z. Charles Ying, Yulia E. Danilova, and Vladimir P. Safonov  »View Author Affiliations


JOSA B, Vol. 18, Issue 5, pp. 698-705 (2001)
http://dx.doi.org/10.1364/JOSAB.18.000698


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Abstract

Selective photomodification of fractal aggregates of silver nanoparticles is studied experimentally by photon-scanning-tunneling microscopy. Near-field optical images of the aggregates before and after photomodification show changes in the distribution of local electromagnetic fields in the near zone at subwavelength scale. These changes are much stronger than those measured in the far field. Results from numerical modeling of photomodification are in qualitative agreement with the experimental observations.

© 2001 Optical Society of America

OCIS Codes
(180.5810) Microscopy : Scanning microscopy
(260.2110) Physical optics : Electromagnetic optics
(310.6860) Thin films : Thin films, optical properties

Citation
W. David Bragg, Vadim A. Markel, Won-Tae Kim, Katyayani Banerjee, Marvin R. Young, Jane G. Zhu, Robert L. Armstrong, Vladimir M. Shalaev, Z. Charles Ying, Yulia E. Danilova, and Vladimir P. Safonov, "Near-field optical study of selective photomodification of fractal aggregates," J. Opt. Soc. Am. B 18, 698-705 (2001)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-18-5-698

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