Hadni A, Bassia J M, Gerbaux X, Thomas R
Appl Opt. 1976 Sep 1;15(9):2150-8. doi: 10.1364/AO.15.002150.
The pyroelectric probe technique is now capable of inspecting a 100 x 100-microm TGS area in a few seconds with a 2-microm limit of resolution. The method is described in detail, and a calculation of the pyroelectric signal is presented. The longitudinal growth of a cylindrical domain is mathematically simulated and also the variation of pyroelectric signal at domain boundary. These calculations are in good accordance with experiment. With a 200-kHz chopping frequency only a thin layer of the crystal surface is inspected (thermal diffusion length l = 0.64 microm), while the lateral limit of resolution is given by the laser spot radius (R(1) = 1 microm). It is possible to decrease this limit by using a smaller laser spot, but the chopping frequency ought to be increased.
热释电探针技术现在能够在几秒钟内检测一个100×100微米的硫酸三甘肽（TGS）区域，分辨率极限为2微米。详细描述了该方法，并给出了热释电信号的计算结果。对圆柱形畴的纵向生长以及畴边界处热释电信号的变化进行了数学模拟。这些计算结果与实验结果吻合良好。在200千赫的斩波频率下，仅检测晶体表面的一薄层（热扩散长度l = 0.64微米），而横向分辨率极限由激光光斑半径给出（R(1)=1微米）。可以通过使用更小的激光光斑来降低此极限，但斩波频率应该提高。
