Abstract

In this article, we report the first experimental observation of resonance light absorption by a fabricated subnanostructure and high frequency rectification in the range corresponding to that of visible light. The subnanostructure consists of a parallel dipole antenna array. A resonance peak signal of short circuit current was observed. This peak signal appeared only at the polarization of incident light parallel to the dipole element. The short circuit peak signal was also observed at a photon energy less than that of the optical band gap. The peak angle exhibited the predicted relation with the wavelength of the incident light. These experimental observations open an avenue to the fabrication of a high efficiency solar cell, as well as a new kind of optical sensor.