Near-field optical studies of local photomodification in nanostructured materials

Citation
Wd. Bragg et al., Near-field optical studies of local photomodification in nanostructured materials, J MICROSC O, 194, 1999, pp. 574-577
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
JOURNAL OF MICROSCOPY-OXFORD
ISSN journal
0022-2720 → ACNP
Volume
194
Year of publication
1999
Part
2-3
Pages
574 - 577
Database
ISI
SICI code
0022-2720(199905/06)194:<574:NOSOLP>2.0.ZU;2-O
Abstract
Fractal aggregates of silver nanoparticles are studied experimentally using atomic force microscopy and photon scanning tunnelling microscopy. Large c hanges in the near-field optical response of fractal aggregates are observe d after the irradiation of samples with nanosecond laser pulses. The thresh old energy density for photomodification using a 532 nm laser is measured t o be 9 mJ cm(-2). It is shown that photomodification-induced changes in the local optical response can be two orders of magnitude larger than changes in far-field absorption.