Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.
HONGGANG WANG1,2,* , YU FENG1, YANHUI XIE1, JIAN LIU2, YUNSHENG QIAN2
Using the modulation transfer function obtained by establishing and solving the two-dimensional continuity equation, we have calculated and comparatively analysed the resolution characteristics of transmission-mode exponential-doping and uniform-doping GaAs photocathodes. The calculated results show that, compared with the uniform-doping GaAs photocathode, the exponential-doping structure can upgrade significantly not only the resolution but also the quantum efficiency of a negative electron affinity GaAs photocathode. This improvement differs from the method for high resolution by reducing the emission layer T e and the electron diffusion length Ld or by increasing the recombination velocity of back-interface V S , which leads to a low quantum efficiency. Moreover, the improvement of resolution and quantum efficiency for transmission-mode exponential-doping GaAs photocathode is the result of facilitating the electron transport and restraining the lateral diffusion by the built-in electric field.
GaAs photocathode, Resolution, Exponential-doping, Modulation transfer function.
HONGGANG WANG, YU FENG, YANHUI XIE, JIAN LIU, YUNSHENG QIAN, Comparative research on resolution characteristics between transmission-mode exponential-doping and uniform-doping GaAs photocathodes, Optoelectronics and Advanced Materials - Rapid Communications, 10, 11-12, November–December 2016, pp.858-863 (2016).
Submitted at: Jan. 8, 2016
Accepted at: Nov. 25, 2016
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
Active accounts were imported to the new platform and assigned a random password by default. In order to access your account you need to access the login page and go through the Lost Password dialog (involves the system sending you an email with instructions) in order to reset your password. This step is necessary as passwords are kept in hashed form and the new platform uses modern hashing algorithms incompatible with the previous ones.