Abstract: Different regimes of heat propagation in metals irradiated by subpicosecond laser pulses are studied on the basis of two-temperature diffusion model. New analytical solutions for the heat conduction equation, corresponding to the different temperature dependences of the electron thermal conductivity K $VAR T$+$VAR$/$-e$/ ($VAR $LS 0), are found. It is shown that in case of a strong electron-lattice nonequilibrium, the heat penetration depth grows linearly with time, l$-T$/ $VAR t, in opposite to the ordinary diffusionlike behavior, l$-T$/ $VAR t$+$HLF$/. Moreover, the heat propagation velocity decreases with increasing laser fluence.!12
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机译：摘要：在二温扩散模型的基础上，研究了亚皮秒激光脉冲在金属中传播热的不同机制。找到了对应于电子导热系数K $ VAR T $ + $ VAR $ / $-e $ /（$ VAR $ LS 0）的不同温度依赖性的热传导方程式的新解析解。结果表明，在强电子-晶格不平衡的情况下，热渗透深度随时间线性增长，l $ -T $ / $ VAR t，与普通的扩散样行为相反，l $ -T $ / $ VAR t $ + $ HLF $ /。此外，传热速度随着激光通量的增加而降低。！12
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