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Laser-Induced Hyper-Sound Surface Acoustic Waves as a Probe of Extended Defects in Crystalline CdZnTe

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Journal of Russian Laser Research Aims and scope

Abstract

For CdZnTe crystals containing extended defects – coherent and incoherent twin boundaries, as well as lamellar systems of twins, we measure the propagation patterns of surface acoustic waves (SAW) in the gigahertz range excited by a sharply focused femtosecond laser pulse. Comparison of the calculated SAW radial velocities with experimental data allows us to determine the local crystallographic orientation of crystal regions with defects. We discover strong anisotropic scattering of SAW at twin boundaries and show that the structure of the twin boundary can be determined from the pattern of SAW scattering. Also, we demonstrate the non-reciprocal SAW propagation in lamellar twin systems, as well as quasi-waveguide SAW propagation along the lamellar twin layer.

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Correspondence to N. Yu. Frolov.

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Frolov, N.Y., Sharkov, A.I. Laser-Induced Hyper-Sound Surface Acoustic Waves as a Probe of Extended Defects in Crystalline CdZnTe. J Russ Laser Res 45, 45–50 (2024). https://doi.org/10.1007/s10946-024-10186-6

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  • DOI: https://doi.org/10.1007/s10946-024-10186-6

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