Abstract
Thin bismuth films have been prepared on glass substrates at room temperature by pulsed laser deposition with a Nd:YAG laser working at a wavelength of 532 nm. The influence of both target diameter and the way of scanning the laser beam over the target surface on the film quality (droplet density and film thickness homogeneity) was studied. Scanning electron microscopy and thickness profile analyses were performed on the films. Three different laser beam scanning schemes have been simulated and tested. Films of high quality are obtained using the highest possible target area eroded in the most homogeneous way. This was achieved with an appropriate scanning of the laser beam over the target, for instance with a ‘crenel’ like scanning or with a scanning at varying speed. Results are discussed in relation to target roughness.
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