Plasma wave electronics: terahertz sources and detectors using two dimensional electronic fluid in high electron mobility transistors

We discuss our recent theoretical and experimental results dealing with plasma waves in high electron mobility transistors (HEMTs) and their applications for sources and detectors operating in millimeter and submillimeter range. Plasma waves in short-channel HEMTs have a resonant response. The HEMTs operating in a plasma wave regime should respond to much higher frequencies than for conventional, transit-time limited devices, since the plasma waves propagate much faster than electrons.