Following the impact of a single femtosecond light pulse on nickel nanostripes, material deformations—or “nanobumps”—are created. We have studied the dependence of these nanobumps on the length of nanostripes and verified the link with plasmons. More specifically, local electric currents can melt the nanostructures in the hotspots, where hydrodynamic processes give rise to nanobumps. This process is further confirmed by independently simulating local magnetic fields, since these are produced by the same local electric currents.
© 2013 Optical Society of America
Optics at Surfaces
Original Manuscript: November 19, 2012
Revised Manuscript: March 20, 2013
Manuscript Accepted: May 29, 2013
Published: June 24, 2013
Ventsislav K. Valev, Wim Libaers, Urs Zywietz, Xuezhi Zheng, Marco Centini, Nils Pfullmann, Lars O. Herrmann, Carsten Reinhardt, Vladimir Volskiy, Alejandro V. Silhanek, Boris N. Chichkov, Concita Sibilia, Guy A. E. Vandenbosch, Victor V. Moshchalkov, Jeremy J. Baumberg, and Thierry Verbiest, "Nanostripe length dependence of plasmon-induced material deformations," Opt. Lett. 38, 2256-2258 (2013)