FENG Liu, LIU Hui, CHENG Hong-chang, SHI Feng, SHI Peng-fei, REN Bing, ZHANG Lian-dong. Influence of different Cs-to-O current ratios on sensitivity and stability of activating GaAs photocathodes[J]. Journal of Applied Optics, 2009, 30(4): 654-658.
Citation: FENG Liu, LIU Hui, CHENG Hong-chang, SHI Feng, SHI Peng-fei, REN Bing, ZHANG Lian-dong. Influence of different Cs-to-O current ratios on sensitivity and stability of activating GaAs photocathodes[J]. Journal of Applied Optics, 2009, 30(4): 654-658.
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Influence of different Cs-to-O current ratios on sensitivity and stability of activating GaAs photocathodes

  • Key Laboratory of Low-Light-Level Technology of COSTIND,Xi’an Institute of Applied Optics,Xi’an 710065,China

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  • Since the different cesium and oxygen currents during the activating process may cause the undefined influence on the sensitivity and stability of GaAs photocathodes, the long-term research was implemented. For the purpose of increasing sensitivity and stability of GaAs photocathodes, three different cesium-to-oxygen current ratios (fixed cesium current and alterable oxygen current) were used to activate the similar GaAs photocathodes, and three sets of experimental results were obtained. The analysis results of experimental data show that the appearance times of photocurrent are almost identical and the peak values of the first photocurrent are very close; ICs/IO=1.07 is the optimum current ratio for high sensitivity and high stability, ICs/IO=1.10 is for low sensitivity but high stability, and ICs/IO=1.03 is for high sensitivity but low stability. Based on the double-dipole model, the stable and uniform double-dipole layers of GaAs-O-Cs:Cs-O-Cs are formed and negative electron affinity is achieved on GaAs surface activated by cesium and oxygen, which cnsists with the analysis results for theexperimental data. The effective technical method can be used to improve the sensitivity and stability of GaAs photocathodes.
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  • ［1］向世明，倪国强. 光电子成像器件原理［M］. 北京：国防工业出版社，1999.
    XIANG Shi-ming, NI Guo-qiang. The principle of photoelectronic imaging devices［M］. Beijing: National Defence Press, 1999. (in Chinese)
    ［2］冯驰，向世明，高景华，等. GaAs与玻璃窗口热压粘接工艺设计［J］. 真空电子技术，2006，6：40-41.
    FENG Chi, XIANG Shi-ming, GAO Jing-hua, et al. Technology design of thermal-compression bonding GaAs with glass window［J］. Vacuum Electronics, 2006,6:40-41. (in Chinese with an English abstract)
    ［3］ELBAHNASAWY R F,MCINERNEY J G,HUG-HES G.Oxidation and carbon contamination in GaAs(100) wet treatments［J］. Materialstoday, 1999,573:145-150.
    ［4］ANDREEV V E, BAKIN V V, LITVINOV A N, et al. Atomic and electronic engineering of P-GaAs-(Cs, O) vacuum interface［J］. AIP,2001,570:901-907.
    ［5］ELAMRAWI K A,ELSAYED-ALI H E.Prepa-ration and operation of hydrogen cleaned GaAs(100) negative electron affinity photocathodes［J］. J. Vac. Sci.Technol.A,1999,17(3):823-831.
    ［6］MORE′ S D,TANAKA S,TANAKA S I,et al. Cesiumoxide-GaAs interface and layer thickness in NEA surface formation［J］. SPIN,2000,570:916-919.
    ［7］向世明.微光像增强器光阴极灵敏度理论极限问题研究［J］.应用光学，2008，29(1)：48-51.
    XIANG Shi-ming. Theoretical limit for photoca-thode sensitivity of image intensifier［J］. Journal of Applied Optics, 2008,29(1):48-51. (in Chinese with an English abstract)
    ［8］承欢，江剑平. 阴极电子学［M］.陕西：西北电讯工程学院出版社，1986.
    CHENG Huan, JIANG Jian-ping. Photocathode electronics［M］. Shaanxi: Press of Northwest Institute of Telecommunication Engineering, 1986. (in Chinese)
    ［9］杜晓晴，常本康，宗志园，等. NEA光电阴极的表面模型［J］. 红外技术，2003，25(1)：68-71.
    DU Xiao-qing, CHANG Ben-kang, ZONG Zhi-yuan, et al. Surface models for NEA photocathode［J］. Infrared Technology, 2003,25(1):68-71. (in Chinese with an English abstract)
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