Optically modulated acoustic charge transport device.

摘要

A novel heterojunction acoustic charge transport device (10) includes a transducer (24) fabricated on a GaAs/AlGaAs heterojunction material that launches surface acoustic waves (SAW) along a transport channel (35). The device is characterized by a photodiode (40) configured adjacent to the channel on the substrate (28) to receive a modulated optical beam. An electrical signal equivalent is provided to a Schottky electrode (33) at the end of the transport channel modulating the charge propagated by the surface acoustic wave. The modulated signal is output at a distal end of the transport channel.