Tjbm. Janssen et al., A NEW MECHANISM FOR HIGH-FREQUENCY RECTIFICATION IN A BALLISTIC QUANTUM POINT-CONTACT, Journal of physics. Condensed matter, 6(13), 1994, pp. 163-168
A large DC voltage response, which depends strongly on the number of o
ccupied subbands, is observed when a quantum point contact is subjecte
d to high-frequency (approximately THz) radiation. This signal is expl
ained by rectification caused by the non-linear one-dimensional transp
ort properties of the point contact.