Y. Oguma et al., Terahertz response with gradual change from square-law detection to photon-assisted tunneling in triple-barrier resonant tunneling diodes, JPN J A P 2, 38(7A), 1999, pp. L717-L719
Current change under irradiation of a terahertz electromagnetic wave was me
asured for a triple-barrier resonant tunneling diode integrated with a plan
ar patch antenna. Gradual change from the classical square-law detection to
photon-assisted tunneling with increasing photon energy was observed.