Energy harvesting enhancement of nanoantenna coupled to geometrie diode using transmitarray

This paper introduces the using of rhombus shaped dipole nanoantenna coupled to geometric diode for energy harvesting at 19.4 THz. An arc-shaped geometric diode is placed in the gap between the dipole arms. The diode I-V characteristics are investigated using the Monte Carlo simulation. Two approaches for enhancing the received voltage of nanoantenna energy harvesting at 19.4 THz are investigated. In the first approach, a transparent trasmitarray is used to focus the electromagnetic waves on the surface of the nanoantenna coupled to the geometric diode. The received voltage is increased from 16.5 μV for single nanoantenna to 97.6 μV for the transmitarray coupled to the nanoantenna. In the second approach, Yagi nanoantenna arrangement is used to enhance the directivity of the single element that coupled to the transmitarray.