Asymmetric dual-grating gate InGaAs/InAlAs/InP HEMTs for ultrafast and ultrahigh sensitive terahertz detection

Abstract

This paper reviews recent advances in ultrafast and ultrahigh sensitive broadband terahertz detection utilizsing asymmetric double-grating-gate InP-based high-electron-mobility transistors, demonstrating a record responsivity of 2.2 kV/W at 1 THz under drain-unbiased conditions with a superior low noise equivalent power of 15 pW/√Hz and 6.4 kV/W even at 1.5 THz under drain-biased conditions.