Flexible energy harvesting devices fabricated in scalable thin-film processes are important components in the field of wearable electronics and the Internet of Things. We present a flexible rectenna based on a one-dimensional junction metal-insulator-graphene diode, which offers low-noise power detection at terahertz (THz) frequencies. The rectennas are fabricated on a flexible polyimide film in a scalable process by photolithography using graphene grown by chemical vapor deposition. A one-dimensional junction area reduces the junction capacitance and enables operation in the D-band (110 - 170 GHz). The rectenna on polyimide shows a maximum voltage responsivity of 80 V/W at 167 GHz in free space measurements and minimum noise equivalent power of 80 pW/Hz.
@article{arxiv.2106.11679,
title = {Terahertz rectennas on flexible substrates based on one-dimensional metal-insulator-graphene diodes},
author = {Andreas Hemmetter and Xinxin Yang and Zhenxing Wang and Martin Otto and Burkay Uzlu and Marcel Andree and Ullrich Pfeiffer and Andrei Vorobiev and Jan Stake and Max C. Lemme and Daniel Neumaier},
journal= {arXiv preprint arXiv:2106.11679},
year = {2021}
}