Each dopant can absorb more than ten photons: Transient absorbance measurement at excitation laser wavelength in polymer ablation

H. Fujiwara, T. Hayashi, Hiroshi Fukumura, H. Masuhara

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Transient absorbance of two doped polymers, poly(methyl methacrylate) with pyrene or biphenyl, at the excitation wavelength was measured under laser ablation conditions. The fluence dependence of the etch depth was explained in terms of absorbance changes due to transient species and scattering by ablated fragments. The total energy absorbed at the threshold was confirmed to be almost identical, independent of the dopant. The number of photons absorbed per dopant was about 12 at the threshold, which will be discussed on the proposed model.

Original languageEnglish
Pages (from-to)2451-2453
Number of pages3
JournalApplied Physics Letters
Volume64
Issue number18
DOIs
Publication statusPublished - 1994 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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