Harmonic enhancement of SAW by acousto-optical beam splitting

F. Linnane, D. Zhang, Michael Geoffrey Somekh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

In this paper a method is described by which the generation of harmonics of high frequency Surface Acoustic Waves is enhanced. The basic laser source employed is a mode locked Q-switched Nd-YAG laser with a fundamental pulse repetition frequency of 82MHz and a pulse envelope corresponding to approximately 30 pulses. We optically generate SAWs on a sample using a line focus. An acousto-optic cell is used to split the pump beam to produce two generating lines on the sample. It is possible to select the separation between these two beams by varying the driving frequencies on the acousto-optic cell. It is thus possible to selectively enhance and suppress the odd and even harmonic components simultaneously. Excellent agreement between the experimental results and the theory was obtained for the 82MHz and 164MHz frequency components.
Original languageEnglish
JournalProgress in Natural Science
Volume6
Issue numberSPEC. ISS.
Publication statusPublished - 1 Dec 1996
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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