Fundamentals and advantages of ultrafast micro-structuring of transparent materials

D. Ashkenasi, G. Müller, A. Rosenfeld, R. Stoian, I. V. Hertel, N. M. Bulgakova, E. E.B. Campbell

Research output: Contribution to journalArticlepeer-review

102 Scopus citations

Abstract

Experimental investigations using femtosecond and picosecond laser pulses at 800 nm illuminate the distinctions between the dynamics and nature of ultrafast processing of dielectrics compared with semiconductors and metals. Dielectric materials are strongly charged at the surface on the sub-ps time scale and undergo an impulsive Coulomb explosion prior to thermal ablation. Provided the laser pulse width remains in the ps or sub-ps time domain, this effect can be exploited for processing. In the case of thermal ablation alone, the high localization of energy accompanied by ultrafast laser microstructuring is of great advantage also for high quality processing of thin metallic or semiconducting layers, in which the surface charge is effectively quenched.

Original languageEnglish
Pages (from-to)223-228
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Volume77
Issue number2
DOIs
StatePublished - Jul 2003

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