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Product Code: ICAL09_N105

Surface Plasmon Polaritons for Micro and Nano-Texturing of Metal Surfaces
Authors:
Leigh Mellor, The University of Liverpool; Liverpool Great Britain
Stuart Edwardson, The University of Liverpool; Liverpool Great Britain
Walter Perrie, The University of Liverpool; Liverpool Great Britain
Geoff Dearden, The University of Liverpool; Liverpool Great Britain
Ken Watkins, The University of Liverpool; Liverpool Great Britain
Presented at ICALEO 2009

The surfaces of a range of metallic materials have been modified through laser illumination. A high frequency pulsed fibre laser system was applied to the surface with varying parameters such as pulse energy, scan speed, pitch, and pulse frequency. Modification of the surfaces was attributed to the production of Surface Plasmon Polaritons along the sample surface, resulting in a ripple effect with features smaller than the wavelength of the incoming laser radiation. Experimentation has been carried out on the surfaces of nickel, steel and titanium samples. A picosecond pulsed fibre laser system by Fianium was used. Due to the high repetition rates of the Fianium system (up to 500 kHz), scan speeds of up to 5ms-1 were possible suggesting high throughput of this process. Potential applications of this structuring method include modification of wetting angle, particularly if combined with micro scale features.

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