Absorption of ultrashort intense lasers in laser–solid interactions*
Sheng Zheng-Minga),b),†, Weng Su-Minga), Yu Lu-Lea), Wang Wei-Minc), Cui Yun-Qianc), Chen Mina), Zhang Jiea)
Fig. 10. a Typical energy spectrum evolution after t 0 , where t 0 represents the time when the reflect laser pulse just completely leaves the target surface. The laser is incident at 21.6#cod#x00B0; with intensity 1.37 #cod#x00D7; 10 18 Wcm 2 and the preplasma density scale length is #cod#x03BB; 0 . b Hot electron temperature versus incident laser intensity with different parameters. The dashed, dotted, and dash-dotted lines are power fittings of the corresponding data. c Angular dependence of hot electron temperature at incident intensity 1.37 #cod#x00D7; 10 18 Wcm 2 . [ 140 ]