Widely Frequency Tunable Terahertz-Wave Emitter Integrating Uni-Traveling-Carrier Photodiode and Extended Bowtie Antenna

摘要

We have demonstrated the extremely wide frequency tunable operation of a continuous terahertz (THz) wave emitter based on a uni-traveling-carrier photodiode (UTC-PD). A novel compact planar antenna was integrated with an InP/InGaAs UTC-PD, and assembled in a quasi-optical package. The fabricated module had a responsivity of 0.21 A/W, and was operated at frequencies from 30 GHz to 1.6 THz. The detected output powers were 120μW at 200 GHz, 17μW at 500 GHz, and 2.9 μW at 1 THz for a photocurrent of 10 mA with a bias voltage of only -0.6 V.