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Banerjee, P.
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document
Pulsed Laser Deposition using high-power Nd:YAG laser source operating at its first harmonics
Abstract
<p>We report on the progress of Pulsed Laser Deposition growth of thin films by using a high-power Nd:YAG laser source. We demonstrate that by using the fundamental wavelength at 1064 nm, the congruent ablation of a large number of materials can be successfully achieved. Even if the infra-red radiation of the fundamental harmonics of Nd:YAG lasers - corresponding to impinging photons with energy of about 1.16 eV - is unexpectedly proved to be also absorbed by insulating materials characterized by a large value of the band-gap (e.g. 3.0 eV for rutile TiO<sub>2</sub>). Combined investigation of structural properties by transmission electron microscopy and scanning electron microscopy provides evidence of the very high-quality thin films grown by Nd:YAG lasers with no trace of precipitates and droplets over a scale of tens of micrometers.</p>