Terahertz Rectennas on Flexible Substrates Based on One-Dimensional Metal–Insulator–Graphene Diodes
Andreas Hemmetter, Xinxin Yang, Zhenxing Wang, Martin Otto, Burkay Uzlu, Marcel Andree, Ullrich Pfeiffer, Andrei Vorobiev, Jan Stake, Max C. Lemme, Daniel Neumaier
Abstract
High Resolution Image Download MS PowerPoint Slide Flexible energy harvesting devices fabricated in scalable thin-film processes are crucial for wearable electronics and the Internet of Things. We present a flexible rectenna based on a one-dimensional junction metal–insulator–graphene diode, offering 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 reduces the junction capacitance and enables operation up to 170 GHz. The rectenna shows a maximum responsivity of 80 V/W at 167 GHz in free space measurements and minimum noise equivalent power of 80 pW/√Hz.