Near-field optical study of selective photomodification of fractal aggregates

Authors
Bragg, WD Markel, VA Rim, WT Banerjee, K Young, MR Zhu, JG Armstrong, RL Shalaev, VM Ying, ZC Danilova, YE Safonov, VP
Citation
Wd. Bragg et al., Near-field optical study of selective photomodification of fractal aggregates, J OPT SOC B, 18(5), 2001, pp. 698-705
Citations number
49
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
ISSN journal
07403224 → ACNP
Volume
18
Issue
5
Year of publication
2001
Pages
698 - 705
Database
ISI
SICI code
0740-3224(200105)18:5<698:NOSOSP>2.0.ZU;2-E
Abstract
Selective photomodification of fractal aggregates of silver nanoparticles i s studied experimentally by photon-scanning-tunneling microscopy. Near-fiel d optical images of the aggregates before and after photomodification show changes in the distribution of local electromagnetic fields in the near zon e at subwavelength scale. These changes are much stronger than those measur ed in the far field. Results from numerical modeling of photomodification a re in qualitative agreement with the experimental observations. (C) 2001 Op tical Society of America.