Structure of Acoustic Field in Infrared Tellurium Based X-Y Deflector
A.S. Trushina and V.B. Voloshinov b
aLebedev Physical Institute RAS, 119991, 53 Leninskij Prospekt, Moscow, Russia
bLomonosov Moscow State University, 119991, GSP-1, Leninskie Gory, Moscow, Russia
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Theoretical investigation of acoustic field in a tellurium two-coordinate deflector was carried out. We used angular spectrum method supported by consideration to boundary conditions in approximation of a given displacement to calculate spatial distribution of the acoustic field intensity. Volumetric illustration is presented for the acoustic beam launched from YZ face of the crystal. Cross-sections of the acoustic field generated from XZ face are also presented in the work. It is shown that the strong anisotropy of acoustic properties in the Te crystal leads to principally different structure of the two fields excited from the XZ and YZ crystal faces. The acoustic field excited from the XZ face may be considered as a simple beam with a relatively high divergence. On the other hand, the field generated from the YZ face looks like superposition of two beams with relatively low divergence. Ratio of intensities of the two beams generated by longitudinal piezotransducers is equal to the ratio predicted by analysis based by plane-wave theory.

DOI: 10.12693/APhysPolA.127.55
PACS numbers: 02.30.Nw, 02.60.Cb, 02.70.Hm, 43.20.Gp, 46.40.Cd, 46.15.-x