摘要
The acoustic modes of diamond are not only of profound significance for studying its thermal conductivity, mechanical properties, and optical properties, but also play a definite role in the performance of high-frequency and high-power acoustic wave devices. Here, we report on the bulk acoustic waves(BAWs) and surface acoustic waves(SAWs) of single-crystal diamond using angle-resolved Brillouin light scattering(BLS) spectroscopy. We identify two high-speed surface skimming bulk waves(SSBW) with acoustic velocities of 1.277×10^(6) and 1.727×10^(6) cm/s, respectively. Furthermore, we obtain the relationship between the velocity of arbitrary BAWs and that of BAWs propagating along the high-symmetric axis at different incident angles. In the community of diamond-based acoustic studies, our results may provide a valuable reference for fundamental research and device engineering.
基金
supported by the National Basic Research Program of China(Grant Nos. 2016YFA0300804,and 2016YFA0301200)
the Beijing Natural Science Foundation (Grant No. JQ18014)
the National Natural Science Foundation of China (Grant Nos. 12074371,and 51527901)。
