Photodiodes for Terahertz Applications
James Seddon, Michele Natrella, Xiaoli Lin, Chris Graham, Cyril C. Renaud, A.J. Seeds
Abstract
Terahertz generation using high-speed photodiodes has found commercial application in many areas ranging across spectroscopy, imaging and communications. In this paper we discuss the optimization of high-speed photodiodes in terms of bandwidth and output power. We identify some of the main limitations in the generation of high output power in the Terahertz frequency band. We present a modelling tool for the numerical evaluation of antenna coupled uni-travelling carrier photodiodes and experimental evaluation of the fabricated designs. We also present a thermal analysis of the photodiodes alongside pulsed measurements of the output power saturation.
Topics & Concepts
PhotodiodeTerahertz radiationOptoelectronicsBandwidth (computing)Terahertz spectroscopy and technologyOpticsPhotomixingVivaldi antennaMaterials scienceComputer scienceAntenna (radio)PhysicsLaserTelecommunicationsTerahertz metamaterialsRadiation patternFar-infrared laserTerahertz technology and applicationsSpectroscopy and Laser ApplicationsPhotonic and Optical Devices