Abstract
We demonstrate an experimental result that shows the phase singularity of surface plasmon waves generated by the direct transform of optical vortices at normal incidence focused on a structureless metal surface. The near-field two-dimensional intensity distribution near the focal plane is experimentally examined by using near-field scanning optical microscopy and shows a good agreement with the finite-difference time-domain simulation result. The experimental realization demonstrates a potential of the proposed excitation scheme to be reconfigured locally with advantages over structures milled into optically thick metallic films for plasmonics applications involving plasmonic vortices.
© 2011 Optical Society of America
Full Article | PDF ArticleMore Like This
Shibiao Wei, Jiao Lin, Qian Wang, Guanghui Yuan, Luping Du, Rong Wang, Le Xu, Minghui Hong, Changjun Min, and Xiaocong Yuan
Opt. Lett. 38(7) 1182-1184 (2013)
Guanghui Yuan, Qian Wang, and Xiaocong Yuan
Opt. Lett. 37(13) 2715-2717 (2012)
Z. Shen, Z. J. Hu, G. H. Yuan, C. J. Min, H. Fang, and X.-C. Yuan
Opt. Lett. 37(22) 4627-4629 (2012)