Zheng Shoujun, Kong Yongfa, Liu Hongde, Chen Shaolin, Zhang Ling, Liu Shiguo, Xu Jingjun
School of Physics, Nankai University, Tianjin 300071, China.
Opt Express. 2012 Dec 17;20(27):29131-6. doi: 10.1364/oe.20.029131.
We developed a real-time imaging system to probe the light-assisted domain reversal process of Mg-doped LiNbO(3). An interesting phenomenon was observed where the domain appeared to reverse just after the laser was obscured. An exclusive electric field of about 350 V/mm was measured at 532 nm of light irradiation at an intensity of 6.6 × 10(4) W/cm(2). The exclusive electric field was considered to be produced by a pyroelectric effect owing to a temperature change in the region of irradiation. The temperature change in the light-irradiated region was calculated to be about 2.3°C. Our experimental results indicate that a change of the electric field caused by the pyroelectric effect may play a significant role when LiNbO(3) or other ferroelectric crystals are used under strong light.
我们开发了一种实时成像系统，用于探测掺镁铌酸锂（LiNbO₃）的光辅助畴反转过程。观察到一个有趣的现象，即在激光被遮挡后，畴似乎立即发生了反转。在光强为6.6×10⁴W/cm²的532nm光照射下，测得约350V/mm的专属电场。该专属电场被认为是由照射区域的温度变化引起的热释电效应产生的。计算得出光照射区域的温度变化约为2.3°C。我们的实验结果表明，当在强光下使用LiNbO₃或其他铁电晶体时，热释电效应引起的电场变化可能起重要作用。
