In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 65, No. S1 ( 1979-06-01), p. S47-S47
Abstract:
By utilizing the optical diffraction produced by acousto-optical interaction, the generation characteristics of SAW in the excited interdigital transducer may be observed directly and measured quantitatively. Both the method of dark field imaging and that of simple optical probing have been used. The periodic IDT and LFM IDT deposited on the substrates of YZ-LiNbO3 have been investigated. For the periodic IDT, the experimental investigations show that the SAW generation characteristic are of symmetric growth in both emission directions of the excited IDT, but in the case of LFM IDT, the experimental results indicate asymmetric. Observations of the latter will be described and discussed in some length. Theoretical calculations have been made and their comparison with experimental data are presented. As concluding remarks, it is pointed out that all the intensities (or power flux) of SAW under investigation are represented both in theory and in experiment by the intensities of the superposition of two-directional radiations of each finger pairs, which were considered separatively by Zuliani and Ristic [J. Appl. Phys. 49, 3018–3024 (1978)] for the periodic IDT.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1979
detail.hit.zdb_id:
1461063-2
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