Femtosecond laser ablation dynamics of amorphous film of a substituted Cu-phthalocyanine

Citation
Y. Hosokawa et al., Femtosecond laser ablation dynamics of amorphous film of a substituted Cu-phthalocyanine, APPL SURF S, 154, 2000, pp. 192-195
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
APPLIED SURFACE SCIENCE
ISSN journal
0169-4332 → ACNP
Volume
154
Year of publication
2000
Pages
192 - 195
Database
ISI
SICI code
0169-4332(200002)154:<192:FLADOA>2.0.ZU;2-L
Abstract
Femtosecond laser ablation dynamics of an amorphous thin film of a substitu ted Cu-phthalocyanine was studied using time-resolved absorption spectrosco pic and scattering imaging methods. Above the ablation threshold of 45 mJ/c m(2), the etch-depth is about 400 nm and almost constant up to a laser flue nce of 300 mJ/cm(2). Transient absorption spectra confirmed that the electr onic excitation energy is converted to heat through exciton-exciton annihil ation within 100 ps after excitation. The etching profile and ablation thre shold are discussed in connection with the heating rate. (C) 2000 Elsevier Science B.V. All rights reserved.