偶氮类电光聚合物薄膜非线性定量研究

介绍了主客掺杂NAEC/PMMA电光极化聚合物薄膜的制备方法，测得其紫外可风吸收光谱和在1064 nm波长下的二阶非线性系数X_(33)~((2))，为23.6 pm/V；采用两态模型，对X_(33)~((2))进行了理论估算，作出了其色散曲线，得到理论值与实验值符合较好的结论。估算极化电场强度为2.638 MV/cm

聚合物单模光波导的研究

采用一种间接方法，计算出了DCNP／PEK－c主客掺杂聚合物薄膜在1300 nm波长下的折射率；在对其平板光波导研究的基础上，进行了新型单模倒脊型聚合物光波导的设计与制做。结果表明，此此新型光波导具有较好的单模性

电光聚合物薄膜非线性效应的研究

采用旋涂的方法制备了主客掺杂15%NAEC/PMMA有机聚合物薄膜，通过测量其DSC曲线来确定玻璃化温度，并在此温度对其进行电晕极化。测量了薄膜极化前后以及退极化的紫外-可见吸收光谱，研究了NAEC/PMMA薄膜中客体生色团的电极化取向以及薄膜的二阶非线性效应

聚合物薄膜中生色团分子间的相互作用对其宏观二阶非线性的影响

制备了3-(1,1-二氰基塞吩)-1-苯-4,5-二羟基-H-噻唑(DCNP)与聚醚醚酮(PEK-c)组成的主客掺杂聚合物薄膜，用Maker条纹法测量了不同掺杂浓度下薄膜的二阶非线性系数λ~((2))_(33)。实验结果表明，聚合物中生色团的含量高到一定程度，其宏观二阶非线性随生色团含量的增加反而下降。该文在考虑聚合物中生色团分子相互作用的情况下，修正了聚合物宏观二阶非线性与生色团的含量之间的关系，此时聚合物宏观二阶非线性与生色团的含量已非简单的正比关系。讨论了生色团分子间的相互作用对聚合物宏观二阶非线性的影响，从微观上解释了生色团分子在较高含量下其相互作用对聚合物宏观二阶非线性的衰减

简单反射法测量聚合物薄膜线性电光系数的研究

简单反射法是电光聚合物薄膜研究中测量线性电光系数(Pockels系数)的一种简单而常采用的方法，但文献中关于在调制电场作用下s光和p光光程差和位相差改变的计算有不尽完善之处，线性电光系数的表达结果也不尽相同。在充分考虑各种因素的情况下，对该方法给出了合理的理论处理，得出了简单反射法更为严格的线性电光系数表达式。并测量对比了几种聚合物线性电光系数的结果。讨论了简单反射法测量聚合物薄膜线性电光系数的局限性

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