GaAs CCD's with transparent (ITO) gates for imaging and optical signal processing

Sputtered indium tin oxide (ITO) film is used as the transparent Schottky gate material for GaAs CCD's. In addition the gigahertz clocking-rate capability of GaAs CCD's makes them attractive for high-speed optical signal processing applications. The operation of the GaAs CCD's with fixed-aperture mask over the transparent gates is reported here. Such structures are basic components of a GaAs CCD-based electrooptic processor (EOP).