Semiconductor Physics, Quantum Electronics & Optoelectronics. 2002. V. 5, N 1. P. 31-35.

PACS: 62.30.+d

Properties and application of ultrasonic Lamb waves in Cd_XHg_1-XTe plates
I.O. Lysiuk, V.F. Machulin, Ja.M. Olikh

Institute of Semiconductor Physics, NAS of Ukraine, 45 prospect Nauky, 03028 Kyiv, Ukraine
Phone: 380 (044) 265 6256; fax: 380 (044) 265 8342; e-mail: olikh@class.semicond.kiev.ua

Abstract. Group and phase velocities of the lowest orders of Lamb waves in <100>, <110> directions for (100) Cd_0.2Hg_0.8Te plates are calculated. Frequency dispersion of a0 and s0 Lamb modes velocities were measured on (111)-plates in the range of frequencies from 0.2 to 10 MHz. The frequency dependencies of relative efficiency of the Lamb modes excitation using two geometrical versions: symmetrical - with two piezoelectric transducers, and antisymmetrical - with one piezoelectric transducer, have been studied. Possible applications of studied waves including ultrasonic treatment of semiconductors have been discussed.

Keywords: Cd_XHg_1-XTe solid solutions, ultrasonic treatment, Lamb waves, efficiency of ultrasonic mode generation.
Paper received 15.01.02; revised manuscript received 25.02.02; accepted for publication 05.03.02.

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