Optical limiting in SrBi2Ta2O9 and PbZrxTi1−xO3 ferroelectric thin films
Optical limiting in SrBi2Ta2O9 and PbZrxTi1−xO3 ferroelectric thin films
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DOI：
10.1063/1.1477618
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发表时间：
2002-04
影响因子：
4
通讯作者：
P. Yang;Jianfeng Xu;J. Ballato;R. W. Schwartz;D. Carroll
中科院分区：
文献类型：
--
作者：
P. Yang;Jianfeng Xu;J. Ballato;R. W. Schwartz;D. Carroll
在1.064 μm纳秒激光脉冲作用下，观察到了SrBi 2 Ta 2 O 9（SBT）和PbZrxTi 1 − xO 3（PZT）铁电薄膜的光限幅效应.限制阈值被发现是5.84 J/cm 2的SBT和PZT之间的4.53和5.93 J/cm 2，取决于组合物，而膜的饱和阈值分别为约2.92 J/cm 2和2.27 J/cm 2至2.97 J/cm 2之间。还确定了SBT和PZT的损伤阈值分别为10.0 J/cm 2和10.37 J/cm 2至10.54 J/cm 2。一个可能的机制所观察到的限制，从铁电畴的非线性光学散射，进行了讨论。这些结果阐明了钙钛矿型铁电薄膜的非线性光学性质的起源，并显示了这种材料在基于非线性光学效应的光子器件中的潜在作用。
Optical limiting effects in SrBi2Ta2O9 (SBT) and PbZrxTi1−xO3 (PZT) ferroelectric thin films have been observed with nanosecond laser pulses at 1.064 μm. Limiting thresholds were found to be 5.84 J/cm2 for SBT and between 4.53 and 5.93 J/cm2 for PZT, depending on composition, whereas saturation thresholds for the films were about 2.92 J/cm2 and between 2.27 J/cm2 to 2.97 J/cm2, respectively. Damage thresholds around 10.0 J/cm2 and between 10.37 J/cm2 to 10.54 J/cm2, respectively for SBT and PZT, were also determined. A possible mechanism for the observed limiting, nonlinear optical scattering from the ferroelectric domains, is discussed. These results elucidate the origin of the nonlinear optical properties in perovskite-type ferroelectric thin films and show the potential role such materials can play in photonic devices based on nonlinear optical effects.