Details

Autor(en) / Beteiligte

• Radko, I P
• Bozhevolnyi, S I
• Brucoli, G
• Martín-Moreno, L
• García-Vidal, F J
• Boltasseva, A

Titel

Efficient unidirectional ridge excitation of surface plasmons

Ist Teil von

• Optics express, 2009-04, Vol.17 (9), p.7228-7232

Ort / Verlag

United States

Erscheinungsjahr

2009

Quelle

MEDLINE

Beschreibungen/Notizen

• Using leakage-radiation microscopy, we characterize the efficiency of unidirectional surface-plasmon excitation with periodic (800 nm) arrays of 130-nm-high and 330-nm-wide gold ridges on a thin gold film illuminated with a focused (5-microm-wide) laser beam. We demonstrate that, at the resonant wavelength of 816 nm, the excitation efficiency of > 0.4 can be obtained with >or= 5 ridges by adjusting the beam position. Conducting numerical simulations, we account for the experimental results and calculate the electric-field enhancement achieved near the gold surface.