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Advances in Mechanical Engineering
Volume 2010 (2010), Article ID 452749, 4 pages
http://dx.doi.org/10.1155/2010/452749
Research Article

Metallic Light Absorbers Produced by Femtosecond Laser Pulses

The Institute of Optics, University of Rochester, Rochester, NY 14627, USA

Received 1 April 2009; Accepted 20 August 2009

Academic Editor: Chen Li

Copyright © 2010 Anatoliy Y. Vorobyev and Chunlei Guo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Using high-intensity femtosecond laser pulses for surface structuring, technologically important metallic light absorbers (dark Au, W, and Ti alloy) with absorption of about 85–95% over a broad wavelength range from ultraviolet to infrared were produced. It was found that the enhanced absorption of the dark metals is caused by a rich variety of nano-/microscale surface structures. The dark metals produced in this study may find a variety of applications in the fields of renewable energy and energy efficiency, such as thermophotovoltaics, solar energy absorbers, thermal radiation sources, and radiative heat transfer devices.