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<p>Picosecond laser ultrasonics (PLU) has emerged as a powerful non-destructive technique for characterizing the mechanical properties of materials at the nanoscale, providing unprecedented insights into key parameters such as elastic constants, film adhesion, and subsurface defects. This review provides a comprehensive overview of the advances in PLU for mechanical analysis. We begin with the fundamental principles of opto-acoustic generation and detection, discuss various technical methodologies, and then delve into its diverse applications in material properties characterization and non-destructive mechanical imaging. Finally, we discuss the current challenges and future prospects, highlighting the path toward industrial integration through automation and AI-driven analysis.</p>

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Review on Advances in Picosecond Laser Ultrasonics for Mechanics

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Jinyu Yan,
  • Lin’an Li,
  • Yantao Zeng,
  • Kai Chen,
  • Lipan Xin,
  • Shibin Wang,
  • Zhiyong Wang,
  • Chuanwei Li

摘要

Picosecond laser ultrasonics (PLU) has emerged as a powerful non-destructive technique for characterizing the mechanical properties of materials at the nanoscale, providing unprecedented insights into key parameters such as elastic constants, film adhesion, and subsurface defects. This review provides a comprehensive overview of the advances in PLU for mechanical analysis. We begin with the fundamental principles of opto-acoustic generation and detection, discuss various technical methodologies, and then delve into its diverse applications in material properties characterization and non-destructive mechanical imaging. Finally, we discuss the current challenges and future prospects, highlighting the path toward industrial integration through automation and AI-driven analysis.