Polarization-sensitive broadband sub-terahertz-wave detector implementing planar-antenna-integrated schottky barrier diode

A polarization-sensitive sub-THz-wave detector module implementing an InP-based Schottky barrier diode that integrates an extended bowtie antenna has been developed. The fabricated module could detect signals at frequencies from 30 GHz to 1 THz. The measured sensitivities were 1080 V/W at 250 GHz, 250 V/W at 400 GHz, and 86 V/W at 600 GHz for a zero-bias condition. The principal polarization axis angle was confirmed to be stable at frequencies from 80 to 600 GHz while the degree of polarization was more than 95%.