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 1.277×10⁶ and 1.727×10⁶ 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.

金刚石的声学模式不仅对研究其导热性、力学性能和光学性能具有深远的意义，而且对高频大功率声波器件的性能也起着一定的作用。在这里，我们使用角分辨布里渊光散射 (BLS) 光谱报告了单晶金刚石的体声波 (BAW) 和表面声波 (SAW)。我们识别出两种声速分别为 1.277×10 ⁶和 1.727×10 ⁶的高速表面撇取体波 (SSBW)厘米/秒，分别。此外，我们还获得了任意 BAW 的速度与在不同入射角下沿高对称轴传播的 BAW 速度之间的关系。在基于钻石的声学研究社区中，我们的结果可能为基础研究和设备工程提供有价值的参考。