Contact modelling of heterojunction acoustic transport devices

Acoustic charge transport in a n-i-n three terminal device

“…In ACT devices the SAW electric field bunches electrons together into packets and transports them through a semiconductor channel. Typically, this is depleted from charge by top and/or back gate electrodes, while electron packets are extracted from an undepleted region of the semiconductor located beneath an ohmic input contact (IC) [7,8]. A time-varying electrical signal applied to the IC produces a sequence of charge packets that travel through the device toward an ohmic output contact (OC).…”