半导体表面场产生太赫兹电磁波的机理研究

介绍了两种由半导体表面场产生THz辐射的物理机制：一种是利用半导体表面的耗尽层电场,另一种是利用半导体表面的Dember电场加速载流子,形成瞬态光电流而辐射出电磁波.文中对这两种模型的辐射机理进行了深入的讨论,对利用表面场产生THz辐射的机理有了深刻的认识,为高效、便捷、低成本的THz辐射源的研究提供了基础.

Study on the Mechanism of THz Electromagnetic Wave from Semiconductor Surface Field

Two models of generating THz radiation by semiconductor surface field are introduced: one is that the carriers are accelerated by the depletion field of semiconductor surface;the another is that the carriers are accelerated by the photo-Dember field.THz wave radiated from the transient photocurrent due to the acceleration of photocarriers.Detail discussion on the radiation mechanisms based on the two models makes people have more profound understanding to the mechanism of THz radiation by surface field.This he useful information for the investigation of THz radiation sources which are high efficient,convenient and low cost will provided.