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本文对矩形光脉冲光电响应后沿拖曳的形成机制进行了详尽的实验研究和理论分析，认为形成该光电响应时滞后曳的主要根源在于光生电子与空穴的多声子慢态复合．我们给出了削减后沿拖曳、提高光电响应速度的有效措施，从而促进解决宽带光通讯的速度瓶颈问题．
In this paper, the experimental research and theoretical analysis of the trailing edge drag mechanism of the rectangular optical pulse are carried out. It is concluded that the main cause of the delayed drag of the photoelectronic response is the multi-phonon slow mode recombination of photogenerated electrons and holes. We provide effective measures to reduce trailing edge drag and increase the optoelectronic response speed, so as to solve the speed bottleneck problem of broadband optical communication.