研究对比了激光直接辐照、聚焦辐照以及激光等离子体辐照三种辐照方式下,洋葱表皮细胞的烧蚀特征,并基于激光辐照的热力学特性对细胞的温升以及相变过程进行分析。观察发现:直接辐照对细胞的杀伤效果很不明显;聚焦辐照会引起焦点附近细胞的断裂以及脱水;激光等离子体辐照作用下,细胞会呈现大面积的去除,断裂边缘粗糙,且细胞层有叠加现象。理论分析发现,激光等离子体具有热效应、辐射电离及冲击波效应等,会增加激光脉冲能量到细胞的沉积、以及对细胞冲击剥离等,从而会大大增加细胞的杀伤范围和效率,可用于对细胞进行大面积杀伤。 The ablation characteristics of onion epidermal cells under direct irradiation with laser irradiation, focused irradiation and laser plasma irradiation were compared and studied. Based on the thermodynamic characteristics of laser irradiation, the cell temperature rise and phase transformation were carried out analysis. The results showed that the killing effect of direct irradiation on cells was not obvious. Focusing radiation could cause cell rupture and dehydration in the focal spot. Under laser plasma irradiation, the cells would be removed in a large area, the rupture edge was rough, Layer superimposed phenomenon. The theoretical analysis shows that the laser plasma has thermal effects, radiation ionization and shock wave effects, which can increase the laser pulse energy to deposit into the cells and impact on cell stripping, which greatly increases the cell killing range and efficiency and can be used for cell Large-scale destruction.