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Investigation of Semi-Insulating Gallium Arsenide Photoconductive Photodetectors

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Investigation of Semi-Insulating Gallium Arsenide Photocondu...

2008 International Conference on Optical Instruments and Technology

作者： Xinmei WANG,Wei SHI~*,Lei HOU,Deming MA,guanghui qu Applied Physics Department,Xi’an University of Technology,Xi’an 710048,China

The structure and working mechanism of a photoconductive photodetector are compared with a p-i-n(PIN)photodiode and a metal-semiconductor-metal(MSM)photodetector which is regarded as two back-to-back Schottky barrier *** a photoconductive photodetector has the features of high critical field strength,especially no junction capacitance and no dead zone,it has the main merits of high signal-noise ratio,ultrafast response and high quantum *** fabricate two photoconductive photodetectors in a lateral configuration on a semi-insulating(SI) gallium arsenide(GaAs)wafer,which wavelength range of response is from UV to 1.73μm due to two-photon *** is shown by the volt-ampere characteristics curve that the dark leakage current of 30-μm-gap SI GaAs photoconductive photodetector at a bias field of 66 V/cm is less than 1.2μ*** experiment has demonstrated that SI GaAs photoconductive photodetectors are noteworthily superior to high-speed Si PIN photodetectors to measure ultrashort pulse lasers with the properties of ultrafast response,ultrawide spectral range,high signal-noise ratio and ease of fabrication.

关键词： photodetector photoconductive gallium arsenide

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基于增加光电子积分时间的磁镜装置研究

光学学报 2007年第11期27卷 1973-1979页

作者：独育飞唐远河刘锴屈光辉宁辉张磊李皓伟西安理工大学应用物理系西安710054

阐述了提高微光成像系统低照度探测极限的本质是需保证成像系统对光信号足够的积累时间,从理论上指出降低CCD温度实现低照度探测的局限性和实现技术的复杂性后,提出在光阴极与光电子接收器(屏靶)之间耦合一个磁镜装置(即微通道电子瓶板... 详细信息

阐述了提高微光成像系统低照度探测极限的本质是需保证成像系统对光信号足够的积累时间,从理论上指出降低CCD温度实现低照度探测的局限性和实现技术的复杂性后,提出在光阴极与光电子接收器(屏靶)之间耦合一个磁镜装置(即微通道电子瓶板结构)作为一种新的光电子接收器,即可有效保证图像信号的积分时间,提高成像系统的探测信噪比,达到拓展微光成像系统低照度探测极限的目的。论证了磁镜场的物理机理,并用计算机模拟显示出了预期的结果。该方案在常温下能实现当前微光成像系统低温探测灵敏度极限10-11lx的目标。

关键词：成像系统微光成像磁镜探测极限微通道电子瓶板

Transient Characteristics of a Nonlinear GaAs Photoconductive Semiconductor Switch

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Journal of Semiconductors 2008年第6期29卷 1108-1110页

作者：王馨梅施卫屈光辉田立强西安理工大学西安710048

The transient resistance,voltage,and power of a nonlinear GaAs photoconductive semiconductor switch （PCSS） are presented by the finite difference formula to deal with the experiment data, based on the conversation of energy in the switch circuit. This method resolves the problem of directly measuring the transient characteristics of PCSS in nonlinear mode. The curve of transient voltage shows that the average electric field of PCSS in the lock-on period is always higher than the Gunn threshold,and increases monotonically. By comparing the transient power curves of the PCSS and the electrical source,it is demonstrated directly that the power shortage leads to the PCSS from the lock-on state into the selfturnoff state,so a controllable turnoff of the PCSS in lock-on by changing the distribution of the circuit power is predicted.

关键词： photoconductive semiconductor switch lock-on effect nonlinear mode controllable turnoff

基于SI-GaAs材料的新型脉冲压缩二极管

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强激光与粒子束 2021年第10期33卷 126-132页

作者：屈光辉汪雅馨赵岚徐鸣贾婉丽马丽纪卫莉西安理工大学理学院西安710000

针对快前沿高重频脉冲的应用需求,设计并研制了一种基于半绝缘砷化镓(SI-GaAs)材料的新型脉冲压缩二极管,通过实验对其压缩性能和重频运行能力进行了测试。实验结果表明,利用此开关能够将前级脉冲的上升沿压缩约270倍和脉宽压缩14倍;并... 详细信息

针对快前沿高重频脉冲的应用需求,设计并研制了一种基于半绝缘砷化镓(SI-GaAs)材料的新型脉冲压缩二极管,通过实验对其压缩性能和重频运行能力进行了测试。实验结果表明,利用此开关能够将前级脉冲的上升沿压缩约270倍和脉宽压缩14倍;并在50Ω负载上,获得脉冲幅度1.3 kV、上升沿约1.6 ns、脉宽40.59 ns的电脉冲,重复频率达1 kHz,总计运行47 min,触发约两百万次。为研究脉冲压缩二极管的工作原理,对其静态伏安特性进行测试。分析认为,在电压初步加载阶段,SI-GaAs材料内的电场增强型的俘获与离化机制导致耐压增强,二极管在实验过程中出现延迟击穿现象;逆向偶极畴效应产生牵引机制,引发快速上升的位移电流,进而导致反偏结雪崩击穿,二极管表现出瞬间负阻特性,在负载上输出高压纳秒电脉冲。新型脉冲压缩二极管无外加触发快脉冲的前级器件,自身可以维持一定时间的强烈雪崩击穿状态,因此具有体积小、生产成本低的优点,可用于制作小型化高重频的纳秒脉冲功率源。

关键词： SI-GaAs 脉冲压缩二极管重复频率脉冲功率源

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港口信息化硬件解决方案

集装箱化 2011年第1期22卷 28-29页

作者：曲光辉刘江涛烟台华东电子软件技术有限公司

0引言随着全球航运业的快速发展，现代港口呈现布局网络化、业务物流化、格局港城一体化、管理信息化等特点，这些特点要求港口必须全面实现信息化。当前，世界各国都十分重视港口信息化建设，

关键词：港口信息化硬件管理信息化信息化建设现代港口航运业网络化物流化

羊膜移植及自体角膜缘干细胞移植在翼状胬肉等眼表疾病中的应用

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中国继续医学教育 2015年第2期7卷 33-34页

作者：曲广慧苏婷孔光辽宁省丹东市中心医院眼科 118002

目的探讨羊膜移植及自体角膜缘干细胞移植在眼表疾病治疗的临床效果。方法采用甘油保存人羊膜、自体角膜缘干细胞治疗较大面积胬肉、复发胬肉、热化学烧伤致睑球粘连及大泡性角膜病变等眼表疾病,共37例42只眼。结果羊膜移植及自体角膜... 详细信息

目的探讨羊膜移植及自体角膜缘干细胞移植在眼表疾病治疗的临床效果。方法采用甘油保存人羊膜、自体角膜缘干细胞治疗较大面积胬肉、复发胬肉、热化学烧伤致睑球粘连及大泡性角膜病变等眼表疾病,共37例42只眼。结果羊膜移植及自体角膜缘干细胞移植或联合治疗对重建眼表效果满意,且术后不适症状较轻、创面恢复较快。结论羊膜移植及自体角膜缘干细胞移植对眼表重建眼表均有重要良好的功效,能显著降低疾病的复发率。

关键词：羊膜移植角膜缘干细胞移植翼状胬肉眼表疾病

Perioperative toripalimab plus neoadjuvant chemotherapy might improve outcomes in resectable esophageal cancer:an interim analysis of a phase Ⅲ randomized clinical trial

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Cancer Communications 2024年第10期44卷 1214-1227页

作者： Yan Zheng guanghui Liang Dongfeng Yuan Xianben Liu Yufeng Ba Zimin Qin Sining Shen Zhenxuan Li Haibo Sun Baoxing Liu quanli Gao Peng Li Zongfei Wang Shilei Liu Jianping Zhu Haoran Wang Haibo Ma Zhenzhen Liu Fei Zhao Jun Zhang He Zhang Daoyuan Wu Jinrong qu Jie Ma Peng Zhang Wenjie Ma Ming Yan Yongkui Yu Qing Li Jiangong Zhang Wenqun Xing Department of Thoracic Surgery The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Immunotherapy The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Endoscopy The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Pathology The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Radiology The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Biobank The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Strategic Development The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Statistics LinkDoc Technology Co.LtdBeijingP.R.China Department of Cancer Epidemiology The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouP.R.China

Background:In the era of immunotherapy,neoadjuvant immunochemotherapy(NAIC)for the treatment of locally advanced esophageal squamous cell carcinoma(ESCC)is used clinically but lacks of high-level clinical *** study aimed to compare the safety and long-term efficacy of NAIC followed byminimally invasive esophagectomy(MIE)with those of neoadjuvant chemotherapy(NAC)followed by ***:A prospective,single-center,open-label,randomized phase Ⅲ clinical trial was conducted at Henan Cancer Hospital,Zhengzhou,*** were randomly assigned to receive either neoadjuvant toripalimab(240mg)plus paclitaxel(175 mg/m^(2))+cisplatin(75 mg/m^(2))(toripalimab group)or paclitaxel+cisplatin alone(chemotherapy group)every 3 weeks for 2 *** surgery,the toripalimab group received toripalimab(240 mg every 3 weeks for up to 6 months).The primary endpoint was event-free survival(EFS).The pathological complete response(pCR)and overall survival(OS)were key secondary *** events(AEs)and quality of life were also ***:Between May 15,2020 and August 13,2021,252 ESCC patients ranging fromT1N1-3M0 to T2-3N0-3M0were enrolled for interim analysis,with 127 in the toripalimab group and 125 in the chemotherapy *** 1-year EFS rate was 77.9%in the toripalimab group compared to 64.3%in the chemotherapy group(hazard ratio[HR]=0.62;95%confidence interval[CI]=0.39 to 1.00;P=0.05).The 1-year OS rates were 94.1%and 83.0%in the toripalimab and chemotherapy groups,respectively(HR=0.48;95%CI=0.24 to 0.97;P=0.037).The patients in the toripalimab group had a higher pCR rate(18.6%vs.4.6%;P=0.001).The rates of postoperative Clavien-Dindo grade Ⅲb or higher morbidity were 9.8%in the toripalimab group and 6.8%in the chemotherapy group,with no significant difference observed(P=0.460).The rates of grade 3 or 4 treatment-related AEs did not differ between the two groups(12.5%versus 12.4%).Conclusions:The interim results of this ongoing trial showed that in resec

关键词： esophageal squamous cell carcinoma minimally invasive esophagectomy neoadjuvant chemotherapy neoadjuvant immunochemotherapy survival

异源脂质体包裹血红蛋白复苏急性失血性休克猫的效果观察

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经济动物学报 2018年第2期22卷 67-71页

作者：潘星辰渠光辉贾宇旻贾杏林湖南农业大学动物医学院

为探讨异源脂质体包裹血红蛋白(Liposome encapsulated hemoglobin,LEH)复苏急性失血性休克猫的临床效果,利用脂质体包裹猪血红蛋白制作异源LEH,将6只猫随机分为3组,分别为自身红细胞(RBC)组,LEH组和生理盐水组,建立猫急性失血性休克模... 详细信息

为探讨异源脂质体包裹血红蛋白(Liposome encapsulated hemoglobin,LEH)复苏急性失血性休克猫的临床效果,利用脂质体包裹猪血红蛋白制作异源LEH,将6只猫随机分为3组,分别为自身红细胞(RBC)组,LEH组和生理盐水组,建立猫急性失血性休克模型,并维持休克30 min后输入2倍失血体积的乳酸林格液恢复渗透压。分别用自身RBC、LEH、生理盐水再进行复苏,观察比较3组治疗前后的参数指标。LEH组相比于生理盐水组,血氧饱和度、血红蛋白含量有明显上升;生化指标谷草转氨酶(AST)、谷丙转氨酶(ALT)、血肌酐(CREA)、尿素(UREA)中所表达的损伤更低,接近于RBC组的复苏效果。试验结果表明:复苏3 h后,异源LEH可以修正急性失血性休克猫的氧亏和减少低灌注引起的多器官损伤。

关键词：脂质体包裹血红蛋白急性失血复苏

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脂质体包裹血红蛋白的研究进展与临床运用

经济动物学报 2017年第4期21卷 233-236+240页

作者：潘星辰贾宇旻渠光辉贾杏林湖南农业大学动物医学院

脂质体包裹血红蛋白(LEH)有望克服人类和动物的用血障碍。文中以国内外研究LEH的成果为基础,对LEH的发展历史、创新改进、临床运用进行了综述,为脂质体包裹血红蛋白的发展提供参考。

关键词：脂质体血红蛋白发展进程研究改进临床运用