We carried out an experimental and numerical investigation of photoinduced voltage at normal incidence in the nondiffraction regime, which was not predicted to occur by the simple momentum conservation model. We prepared two samples: one having space inversion symmetry and the other without this feature. At normal incidence in the nondiffraction regime, we observed a finite signal only for the asymmetric structure. We found that surface plasmon polaritons (SPPs) are excited by the signal and are attributed to the origin of the voltage. We also evaluated the radiation force of light by using the Maxwell stress tensor and found that pressure of light and not shear force is mainly induced in the structure due to the asymmetric excitation of SPPs.
© 2012 Optical Society of America
Optics at Surfaces
Original Manuscript: January 26, 2012
Revised Manuscript: May 8, 2012
Manuscript Accepted: May 10, 2012
Published: July 3, 2012
Hiroyuki Kurosawa, Teruya Ishihara, Naoki Ikeda, Daiju Tsuya, Masayuki Ochiai, and Yoshimasa Sugimoto, "Optical rectification effect due to surface plasmon polaritons at normal incidence in a nondiffraction regime," Opt. Lett. 37, 2793-2795 (2012)