title: Picosecond electron bunches from GaAs/GaAsP strained superlattice photocathode.
abstract: GaAs/GaAsP strained superlattices are excellent candidates for use as spin-polarized electron sources. In the present study, picosecond electron bunches were successfully generated from such a superlattice photocathode. However, electron transport in the superlattice was much slower than in bulk GaAs. Transmission electron microscopy observations revealed that a small amount of variations in the uniformity of the layers was present in the superlattice. These variations lead to fluctuations in the superlattice mini-band structure and can affect electron transport. Thus, it is expected that if the periodicity of the superlattice can be improved, much faster electron bunches can be produced.
authors.affiliation: Institute for Advanced Research, Nagoya University, Nagoya 464-8603, Japan. jinxg@nagoya-u.jp
authors.forename: Xiuguang
authors.initials: X
authors.lastname: Jin
authors.forename: Shunya
authors.initials: S
authors.lastname: Matsuba
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Honda
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Miyajima
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Utiyama
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Takeda
keywords: Photocathode; Pulse electron beam; SPLEEM; spin-polarization