研究在普通红宝石脉冲激光作用下,锆钛酸系(PZT)压电陶瓷片的电学性质时,观察到一种异常现象:聚焦的脉冲激光束辐照样品时,无论沿极化方向(正向)还是逆极化方向(负向)照射,在样品两面的电极间都能观察到幅度相同而极性不变的电信号波形,但是,当激光击穿样品时,在上述两种照射情况中,所观察到的电信号波形有一个突变,其中之一的极性可能变号。本文报导了所得的实验结果,并对其作了初步探讨。

Under action of normal pulse ruby laser radiation, electric properties of a piezoelectric ceramic thin plate of PZT system have been studied in our experiments. We have observed an unusual phenomenon before a small hole having been drilled by focusing laser radiation on the sample. When the laser radiation directs on it in either polarizing field (positive) or opposite direction (negative), we observe electric signals between two surface electrodes having same shapes and amplitudes, and their polarity is constant. As soon as a small hole has been drilled on the samples, in both sides above illumination cases, we observe eleotrio signals having jump changes in different ways, and one of them may be changed in polarity. This paper reports obtained experiraental results in our work, and makes a primary discussion to them.