Click here to view fulltext PDF

Permanent link:
https://www.ias.ac.in/article/fulltext/pram/075/06/1087-1097

Laser-assisted surface cleaning; transparent/semi-transparent contamination; field enhancement; size of the contaminant particulate.

Pulsed laser-assisted removal of particulates from substrates has decided advantages over the conventional methods of cleaning. Experiments conducted with loose contamination on metal and transparent dielectric surfaces proved conclusively the dominant role played by the absorption of the incident radiation by the surface towards the generation of the cleaning force as against the absorption in the particulates alone. Further, the presence of transparent/semi-transparent particulates on a metal surface was found to result in an increased absorption of the incident radiation by the substrate. This effect, identified as field-enhanced surface absorption was found to increase with reduction in the average particulate size.

J Padma Nilaya¹ D J Biswas¹

1. Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India

Published

December 2010