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Monolithic waveguide zinc-oxide-on-silicon convolver

Monolithic waveguide zinc-oxide-on-silicon convolver

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A monolithic waveguide zinc-oxide-on-silicon convolver has been constructed and operated at a centre frequency of 125 MHz. The zinc oxide is originally deposited over the whole substrate and then etched to form the waveguide. The waveguide width is 1/10 of the beam width at the input transducers, which should yield a 20 dB improvement in efficiency over a normal convolver with a beam width equal to the transducer width, after accounting for the loss in the input tapers. Such an improvement was observed in experimental devices.

References

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      • B.T. Khuri-Yakub , G.S. Kino . A monolithic zinc-oxide-on-silicon convolver. Appl. Phys. Lett.
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      • L.A. Coldren . Effect of bias field in a zinc-oxide-on-silicon acoustic convolver. Appl. Phys. Lett.
    3. 3)
      • K.L. Davis . Storage of optical patterns in a zinc-oxide-on-silicon surface wave convolver. Appl. Phys. Lett.
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      • B.A. Auld . (1973) , Acoustic fields and waves in solids—Vols I and II.
    5. 5)
      • Batani, N.K., Adler, E.L.: `Acoustic convolvers using ribbon waveguide beamwidth compressor', Proceedings of IEEE ultrasonic symposium, 1974, p. 114–116.
    6. 6)
      • Ph. Defranould , C. Maerfeld . Acoustic convolver using multistrip beamwidth compressors. , 224 - 227
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