Multiscale UTC-photodiode compact model enabling monolithic terahertz communication systems design

Due to the continuous increase in data traffic, it is becoming imperative to develop communications systems capable of meeting the throughput requirements. Monolithic Opto-Electronic Integrated Circuits (OEICs) are ideal candidates to meet these demands. With that in mind, we propose a compact and computationally efficient model for Uni-Traveling Carrier PhotoDiodes (UTC-PD), compatible with existing SPICE-based design software, enabling the design of beyond-5G communication systems. The model parameter extraction follows a scalable extraction methodology compatible with BiCMOS and CMOS technologies. A detailed description of the de-embedding process has been presented. Excellent agreement between the compact model and measurements has been achieved, showing model versatility across various technologies and scalability over several geometries.