GaAs/AlGaAs二维电子气（2DEG）散射机理研究

采用三角阱近似,计算了GaAs/AlGaAs二维电子气(2DEG)电子只占据基态子带时,由极性光学声子、声学形变势、声学压电势、远程电离杂质、本底电离杂质合金无序以及界面粗糙等七种主要的散射机制决定的电子迁移率与温度、2DEG浓度、本底电离杂质浓度、以及界面不平整度等的关系。理论计算结果与实验符合很好

高电子迁移率GaAs/AlxGa（1-x）As二维电子气（2DEG）异质结结构参数优化研究

采用三角阱近似,考虑了GaAs/Al_xGa_(1-x)As二维电子气(2DEG)异质结中七种主要的散射机制,计算了2DEG电子迁移率与隔离层厚度(d)和Al组分(x)的关系,对GaAs/Al_xGa_(1-x)As异质结的结构参数进行了优化分析。就作者所知,该文首次计算了2DEG电子迁移率与Al组分x的关系,得到了与实验规律一致的结果

GaAs VCSEL/MISS混合集成光子开关

报道了MBE生长的GaAs材料VCSEL与MISS混合集成构成的光子开关。将MBE生长的超薄AlAs层氧化为A_xO_y层用作MISS器件的超薄半绝缘层，从而解决了该半绝缘层厚度的精密控制以及与VCSEL工艺相容的问题。该集成器件除光子开关功能外，还能实现光放大功能，并可用于自由空间光互连

GaAs、AlAs、DBR反应离子刻蚀速率的研究

采用BCl_3和Ar作为刻蚀气体对GaAs、AlAs、DBR反应离子刻蚀的速率进行了研究，通过控制反应的压强、功率、气体流量和气体组分达到对刻蚀速率的控制。实验结果表

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies