REFLECTION CHARACTERISTICS OF OBLIQUELY INCIDENT SURFACE ACOUSTIC-WAVES FROM GROOVE AND ALUMINUM GRATINGS ON (100)-CUT GALLIUM-ARSENIDE

In this article we present an experimental study of the surface acoust ic wave behavior of a slanted reflector array on {100}-cut, [110]-prop agating GaAs. The thorough examination of both Al stripes and grooves on GaAs unveiled previously unknown information about the behavior of slanted gratings on (100)-cut GaAs. We discovered that etched grooves provide a strong reflection coefficient (C = 0.29) while Al stripes do not (C = 0.014). These data were obtained from measurements of the re flection characteristics for slanted gratings on GaAs. Potential devic e applications include an ultralow power acoustic charge transport dev ice which does not require an interdigital transducer. (C) 1998 Americ an Institute of Physics. [S0021-8979(98)08516-8].