Supersonic laser-induced jetting of aluminum micro-droplets

M. Zenou, A. Sa'Ar, Z. Kotler

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21 Scopus citations

Abstract

The droplet velocity and the incubation time of pure aluminum micro-droplets, printed using the method of sub-nanosecond laser induced forward transfer, have been measured indicating the formation of supersonic laser-induced jetting. The incubation time and the droplet velocity were extracted by measuring a transient electrical signal associated with droplet landing on the surface of the acceptor substrate. This technique has been exploited for studying small volume droplets, in the range of 10-100 femto-litters for which supersonic velocities were measured. The results suggest elastic propagation of the droplets across the donor-to-acceptor gap, a nonlinear deposition dynamics on the surface of the acceptor and overall efficient energy transfer from the laser beam to the droplets.

Original languageAmerican English
Article number181905
JournalApplied Physics Letters
Volume106
Issue number18
DOIs
StatePublished - 4 May 2015

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