Resonant tunneling in a novel coupled-quantum-well base transistor

Resonant tunneling in a novel coupled-quantum-well (CQW) base transistor is investigated with marked modulation in collector current being observed in common-emitter output characteristics. Transconductance measurements reveal that collector current is attributable to resonant tunneling transfer from emitter to collector through the modified energy states in the CQW-base. Current gain as large as 5.5 is observed for the first time with respect to the resonant tunneling current. This indicates 85% of the electrons injected from the emitter are transferred into the collector without recombination in the CQW-base.