Electrical characteristics of Rectenna Integrated Au/HfO2/Pt and CNT Diodes

Optical antennas represent an optical detector similar to radiofrequency antennas but operating in the optical regime. Nowadays, optical antennas are attracting a lot of attention due to their enormous potential for applications in nanoscale optical microscopy, spectroscopy, solar energy conversion, integrated optical nano-circuitry, and molecular sensing, etc.[1]. This increased focus is due to the progress in nano-manufacturing technologies, which makes it possible to utilize sub-wavelength plasmonic structures in different shapes and sizes [2]. Different shapes of the apertures are evaluated for bio-sensing and in the infrared domain such as H-shape, cross shape as well as quad-triangles [3], and bowtie [4]. One fabrication process that can be very helpful in the fabrication of nano-antennas at a small scale (nm and $\mu \mathrm{m}$ scale) is utilizing nano-probe technologies for forming nano-Schottky based tunneling diode rectifiers [5].