论文标题
半胰岛CDTE二极管中可逆空间电荷的光学写作和电光成像
Optical Writing and Electro-Optic Imaging of Reversible Space Charges in Semi-Insulating CdTe Diodes
论文作者
论文摘要
深度水平控制电补偿的半绝缘材料中的空间电荷。它们限制了辐射探测器的性能，但是在这些设备中可以利用它们与游离载体的相互作用，以通过光束来操纵电场的空间分布。通过将半胰岛的CDTE二极管作为案例研究，我们的结果表明，可以实现光学掺杂功能。因此，高度稳定的磁通依赖性，可逆和空间定位的空间电荷是由聚焦于阴极接触区域的线形光束诱导的。电场的实时非侵入性成像是通过Pockels效应获得的。提出了一种检索二维电场组件的简单方便的方法。仅涉及负责电补偿的一个深度水平的数值模拟证实了实验发现，并有助于确定能够实现光学写作功能的潜在机制和关键参数。
Deep levels control the space charge in electrically compensated semi-insulating materials. They limit the performance of radiation detectors but their interaction with free carriers can be favorably exploited in these devices to manipulate the spatial distribution of the electric field by optical beams. By using semi-insulating CdTe diodes as a case study, our results show that optical doping functionalities are achieved. As such, a highly stable, flux-dependent, reversible and spatially localized space charge is induced by a line-shaped optical beam focused on the cathode contact area. Real-time non-invasive imaging of the electric field is obtained through the Pockels effect. A simple and convenient method to retrieve the two-dimensional electric field components is presented. Numerical simulations involving just one deep level responsible for the electrical compensation confirm the experimental findings and help to identify the underlying mechanism and critical parameters enabling the optical writing functionalities.
