We present a novel approach to the characterization of ultrafast laser–matter interaction processes in solids and liquids under extreme conditions of microplasma generation. Through the combination of three-dimensional propagation imaging, absorption measurements, shadowgraphy and photoacoustic imaging we can restore plasma electron density distribution, laser pulse fluence profile and the value of deposited energy density inside the bulk of the material and characterize the regime of the laser pulse propagation. The developped concept is important for understanding the physics of ultrafast laser–matter interactions with strong implications for precision control of laser micromachining, bioprocessing and biotreatment.

中文翻译：

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一种表征液体和固体中激光-物质相互作用过程中沉积能量密度的综合方法

我们提出了一种新方法来表征在产生微等离子体的极端条件下固体和液体中的超快激光-物质相互作用过程。通过三维传播成像、吸收测量、阴影成像和光声成像的组合，我们可以恢复等离子体电子密度分布、激光脉冲能量密度分布和材料内部沉积的能量密度值，并表征激光脉冲的状态传播。所开发的概念对于理解超快激光与物质相互作用的物理学非常重要，对激光微加工、生物加工和生物处理的精确控制具有重要意义。