一、引言 场助Ⅲ—Ⅴ族多元化合物半导体光电阴极与GaAs NEA(Negative electron affinity)光电阴极相比,具有可延伸光电探测的长波阈值、提高红外波段光谱灵敏度等优点,因此在光纤通信、微光夜视以及高速摄影等方面具有广泛的应用。虽然目前场助多元化合物半导体光电阴极的研究已取得了许多成果,但有关理论研究方面的报道却很少见,特别是判别多元化 I. Introduction Compared with GaAs NEA (Negative electron affinity) photocathode, field-assisted Group III-V multicomponent semiconductor photocathode possesses the advantages of extending the long-wave threshold of photoelectric detection and improving the spectral sensitivity of the infrared band. Therefore, in the field of optical fiber communication, Light night vision and high-speed photography has a wide range of applications. Although many achievements have been made in the field of multicomponent photocathodes, there are few reports on theoretical research, especially the discrimination of diversification