激光对电视成像跟踪系统的软杀伤效应研究

分析了电视成像跟踪系统的组成原理,在开展脉冲激光干扰CCD的实验基础上,进行了激光对电视成像跟踪系统的软杀伤实验与理论分析。实验指出,激光对电视成像跟踪系统的软杀伤主要是对CCD光电探测系统的软杀伤,软杀伤效果如何与激光成像是否位于跟踪系统的波门之内有很大关系。     

无噪线性放大的连续变量量子隐形传态

连续变量量子隐形传态在实际的量子通信中起着至关重要的作用.然而,实际环境的噪声与损耗会导致量子纠缠的退化,极大地影响系统的传输性能,尤其是降低系统的传输距离,阻碍其实际应用.本文提出了无噪线性放大的连续变量量子隐形传态方案,利用无噪线性放大器对退化的纠缠源进行放大,从而补偿光纤损耗信道对纠缠源的衰减影响,提升系统的性能.本文详细分析了不同损耗信道和纠缠源情况下,无噪线性放大器的增益系数选取范围以及不同增益对方案性能的影响.仿真结果表明,本文提出的方案相比于原方案,在保真度和传输距离方面都有较大的提升.该研究结果为长距离连续变量量子隐形传态的实际应用提供了一种切实有效的方法.     

Graphitic carbon nitride based single-atom photocatalysts

Single-atom photocatalysts, due to their high catalysis activity, selectivity and stability, become a hotspot in the field of photocatalysis. Graphitic carbon nitride (g-C₃N₄) is known as both a good support for single atoms and a star photocatalyst. Developing g-C₃N₄-based single-atom photocatalysts exhibits great potential in improving the photocatalytic performance. In this review, we summarize the recent progress in g-C₃N₄-based single-atom photocatalysts, mainly including preparation strategies, characterizations, and their photocatalytic applications. The significant roles of single atoms and catalysis mechanism in g-C₃N₄-based single-atom photocatalysts are analyzed. At last, the challenges and perspectives for exploring high-efficient g-C₃N₄-based single-atom photocatalysts are presented.