When the beam is focused to a small spot, its power density is raised to produce sufficient heat to vaporize any material.

当光束在一个小点上聚焦时，其功率强度得以提高，并产生足够的热量来汽化任何材料。

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Great interest is focused on femtosecond laser micro-nano fabrication due to the ultra-short time scale and ultra-high peak power density characteristics of the femtosecond lasers.

飞秒激光由于其超快时间特性和超高峰值功率特性在精密微纳加工领域引起了人们广泛的重视。

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