Surface Plasmon Excitation and Localization by Metal-Coated Axicon Prism

Micromachines

Atsushi Ono¹  Hiroki Sano²  Wataru Inami¹ 

[1] Division of Global Research Leaders, Shizuoka University, 3-5-1 Johoku, Naka, Hamamatsu 432-8561, Japan;Faculty of Mechanical Engineering, Shizuoka University, 3-5-1 Johoku, Naka, Hamamatsu 432-8561, Japan;

关键词: surface plasmon polaritons;    Kretschmann configuration;    radial polarization;    near-field optics;    metallic thin film;   

DOI  :  10.3390/mi3010055

来源: mdpi

【 摘 要 】

Collimated Gaussian beams are efficiently localized at the apex of a metal-coated axicon prism by surface plasmon excitations. We observed the light scattered at the apex and the light reflected by the prism. Intense scattered light was observed with the radial polarization incidence. Further, each incidence of the radial, azimuthal, and linear polarizations provided field distributions of bright and dark intensities in the reflected images according to the surface plasmon excitation. We have demonstrated that surface plasmon waves are excited at the sides of the prism in the Kretschmann configuration and that they converge to its apex.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.