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在高强度激光照射下材料表面会产生蒸发，形成等离子体。如果激光是斜入射材料表面的，则材料光声信号的大小与激光的偏振方向有关。本文通过实验研究了在相同的激光入射角的情况下，光声信号的大小随激光偏振方向的变化关系，得出了激光偏振方向与激光入射面的夹角为０ 度时，光声信号最强；而其夹角为９０ 度时，光声信号为极小值。
In the high-intensity laser irradiation on the surface of the material will produce evaporation, the formation of plasma. If the laser is oblique incidence of the material surface, then the size of the material photoacoustic signal and the laser polarization direction. In this paper, the experimental study of the same incident angle of the laser, the size of the photoacoustic signal with the laser polarization changes in the direction of the laser polarization direction and the angle of incidence of the incident surface is 0 degrees, the photoacoustic signal most Strong; its angle of 90 degrees, the photoacoustic signal is the minimum.