28.3THz bowtie antenna integrated rectifier for infrared energy harvesting

Abstract
The design, fabrication and characterization of an asymmetric 28.3 THz antenna integrated rectifier (rectenna) using Au/Al2O3/Pt is presented. The rectenna design comprises a sharp tip bowtie antenna and a tunneling Metal-insulator-Metal (MIM) diode. The design benefits from the geometric field enhancement around the nano tips of the bowtie antenna. Simultaneous optimization of the antenna's length and flare angle resulted in a relative intensity enhancement of 104 for a 10 nm gap. In order to benefit from the field enhancement, the THz diode is realized through the overlap of the bowtie sharp tips exactly at the hot spot. Dissimilar electrodes are used to allow THz signals rectification at zero bias, which is critical for energy harvesting applications. The rectenna exhibits a zero bias responsivity of 10 A/W. © 2014 European Microwave Association.

Citation
Gadalla, M. N., & Shamim, A. (2014). 28.3THz bowtie antenna integrated rectifier for infrared energy harvesting. 2014 44th European Microwave Conference. doi:10.1109/eumc.2014.6986518

Publisher
Institute of Electrical and Electronics Engineers (IEEE)

Journal
2014 44th European Microwave Conference

Conference/Event Name
2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014

DOI
10.1109/EuMC.2014.6986518

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