Time-resolved optical microscopy of a laser-based forward transfer process

Young, D.; Auyeung, R. C. Y.; Piqué, A.; Chrisey, D. B.; Dlott, Dana D.
May 2001
Applied Physics Letters;5/21/2001, Vol. 78 Issue 21, p3169
Academic Journal
Matrix-assisted pulsed laser evaporation direct write was investigated by ultrahigh speed optical microscopy. A composite barium-zirconium titanate/α-terpineol layer was irradiated by 355 nm laser pulses with a 150 ns pulse width, and it was observed that material removal does not begin until after the end of the pulse (t>200 ns) and continues for 1 μs after the irradiation. The desorption plume consists of micron-size particles moving with a velocity of ∼0.2 km/s. The slow response is attributed to the combination of particle absorbers and highly viscous fluid. The ability to form continuous, pinhole-free coatings is due to slow coalescence of the particles. © 2001 American Institute of Physics.


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