Metal island films show a characteristic absorption peak related to the surface plasmon resonance of free electrons. This kind of film can be used in absorbing coatings, together with dielectric layers. Such absorbing multilayer coatings, with and without the gradient of the silver mass thickness in metal island films throughout the coating, have been deposited by electron beam evaporation. It is shown experimentally that coatings with a gradient in the mass thickness of silver nanoparticles have higher absorption than equivalent nongradient coatings with the same total mass thickness of silver nano particles.
© 2011 Optical Society of America
Original Manuscript: July 30, 2010
Revised Manuscript: November 12, 2010
Manuscript Accepted: November 12, 2010
Published: December 21, 2010
Vesna Janicki, Jordi Sancho-Parramon, and Hrvoje Zorc, "Gradient silver nanoparticle layers in absorbing coatings—experimental study," Appl. Opt. 50, C228-C231 (2011)