光谱学与光谱分析 |
|
|
|
|
|
Investigation of Material Structure and Optical Property of Transmission-Mode GaN Photocathode by Ultraviolet Transmission Spectral |
DU Xiao-qing,TIAN Jian,ZHOU Qiang-fu |
Key Laboratory of Optoelectronic Technology and Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044,China |
|
|
Abstract GaN UV photocathode has become a high-performance vacuum ultraviolet detectors in recent years. As the photocathode practical application mode, transmission-type multilayer structure and its optical property have important influences on photocathode photoemission performance. Ultraviolet transmission spectra of transmission-mode GaN photocathode were measured. The optical transmission model of transmission-mode GaN photocathode was built, and based on the model the functional relations of thin film thickness and optical adsorption coefficient with transmission spectral were deduced. The error of calculated GaN epitaxial thickness with respect to actual value is very small, and calculated adsorption coefficients are consistent with reported data. It was shown that material structure and optical property of transmission-mode GaN photocathode can be evaluated accurately by this ultraviolet transmission spectral method.
|
Received: 2010-06-20
Accepted: 2010-08-30
|
|
Corresponding Authors:
DU Xiao-qing
E-mail: duxq@cqu.edu.cn; muyuandu@sina.com
|
|
[1] Machuca F, Sun Y, Liu Z,et al. Journal of Vacuum Science and Technology B, 2000, 18:3042. [2] Oswald H W Siegmund. Nuclear Instruments and Methods in Physics Research A, 2004, 525: 12. [3] Siegmund O,Vallerga J,Mcphate J,et al. Nuclear Instruments and Methods in physics Research A,2006,567:89. [4] QIAO Jian-liang, TIAN Si, CHANG Ben-kang, et al(乔建良, 田 思, 常本康, 等) Acta Phys. Sin.(物理学报), 2009, 58: 5847. [5] DU Xiao-qing, CHANG Ben-kang, QIAN Yun-sheng, et al(杜晓晴,常本康,钱芸生,等). Chinese J. of Laser(中国激光),2010,37:385. [6] Siegmund O H W, Tremsin A S, Vallerga J V, et al. Proc. SPIE, 2008, 7021: 70211B. [7] Dabiran A M, Wowchak A M, Chow P P. Proc. SPIE, 2009, 7212: 13. [8] DU Xiao-qing, CHANG Ben-kang, QIAN Yun-sheng, et al(杜晓晴,常本康,钱芸生,等). Acta Opt. Sinica(光学学报),2010,30:1734. [9] DU Xiao-qing, CHANG Ben-kang(杜晓晴,常本康). Acta Phys. Sin.(物理学报), 2009,58: 8643.
|
[1] |
XU Qiu-yi1, 3, 4, ZHU Wen-yue3, 4, CHEN Jie2, 3, 4, LIU Qiang3, 4 *, ZHENG Jian-jie3, 4, YANG Tao2, 3, 4, YANG Teng-fei2, 3, 4. Calibration Method of Aerosol Absorption Coefficient Based on
Photoacoustic Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 88-94. |
[2] |
FANG Zheng, WANG Han-bo. Measurement of Plastic Film Thickness Based on X-Ray Absorption
Spectrometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(11): 3461-3468. |
[3] |
CHEN Jie1, 2, 3, QIAN Xian-mei1, 3, LIU Qiang1, 3*, ZHENG Jian-jie1, 2, 3, ZHU Wen-yue1, 3, LI Xue-bin1, 3. Research on Optical Absorption Characteristics of Atmospheric Aerosols at 1 064 nm Wavelength[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(10): 2989-2995. |
[4] |
HUANG Chong1, OUYANG Yan-dong1, WU Yong-jun2, ZHAN Qian-xian2. Analysis of Anti-Ultraviolet Characteristic of Liquid-Crystal Display[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(05): 637-639. |
|
|
|
|