Spatially localized femtosecond pulses have been produced by a combination
of scanning near-field optical microscopy with ultrashort pulse lasers. Wit
h these pulses direct ablative writing on metal surfaces is demonstrated. P
ossible applications of this technique for nanostructuring, repair, and pro
duction of lithographic masks are discussed. (C) 1999 Optical Society of Am
erica OCIS codes: 140.7090, 180.5810, 220.4000.