排序方式: 共有5条查询结果,搜索用时 0 毫秒
1
1.
2.
利用双Hanbury Brown-Twiss探测系统理论分析并在实验上精确测量了不同光场的高阶光子关联g(n)(n> 2).探测系统通过四个单光子计数模块,探测分析光子时间关联的联合分布概率.在理论上,考虑实际探测系统背景噪声和系统效率的影响,分析研究了热态、相干态、压缩真空态和Fock态的三阶及四阶光子关联的结果,及其随光场入射光强、压缩参数及光子数的变化.并在实验中研究了探测系统分辨时间和计数率对相干态和热态的三阶及四阶光子关联的影响.在分辨时间为210 ns,计数率为80 kc/s时,准确测量得到在零延迟处热态的三阶及四阶光子关联,相对理论值的统计偏差分别为0.3%和0.8%.此外还测量得到了不同延迟时间下热态的高阶光子关联的结果.实验表明综合对各种影响因素的分析可精确测量光场的高阶光子关联,该方法在量子关联成像及光场特性分析中有着重要的应用. 相似文献
3.
Effect of heavy ion irradiation on the interface traps of AlGaN/GaN high electron mobility transistors
下载免费PDF全文
![点击此处可从《中国物理 B》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Zheng-Zhao Lin 《中国物理 B》2022,31(3):36103-036103
AlGaN/GaN high electron mobility transistors (HEMTs) were irradiated with heavy ions at various fluences. After irradiation by 2.1 GeV181 Ta32+ ions, the electrical characteristics of the devices significantly decreased. The threshold voltage shifted positively by approximately 25% and the saturation currents decreased by approximately 14%. Defects were induced in the band gap and the interface between the gate and barrier acted as tunneling sites, which increased the gate current tunneling probability. According to the pulsed output characteristics, the amount of current collapse significantly increased and more surface state traps were introduced after heavy ion irradiation. The time constants of the induced surface traps were mainly less than 10 μs. 相似文献
4.
金属-二氧化碳(Me-CO2)电池结合了先进储能和有效固定CO2的双重特性,被视为下一代能源转换和储存以及CO2捕获和利用器件的潜在候选者。然而,目前Me-CO2电池面临如倍率性能差、高极化率、CO2转换效率低、循环寿命短等一系列的挑战。为了便于了解Me-CO2电池的最新研究并促进其发展,本文系统地总结、比较和讨论了基于金属(锂、钠、铝、锌、钾)阳极的Me-CO2电池的发展,包括电池放电/充电机制、阴极材料/电催化剂、电解质、金属电极等,着重阐明了电极和电解质等功能材料对电极反应稳定性和速率的影响,展望了合理构建电池材料的前景和方向,为Me-CO2电池的发展提供指导。 相似文献
5.
1