TITLE

Systematic study of polarized electron emission from strained GaAs/GaAsP superlattice photocathodes

AUTHOR(S)
Maruyama, T.; Luh, D.-A.; Brachmann, A.; Clendenin, J. E.; Garwin, E. L.; Harvey, S.; Jiang, J.; Kirby, R. E.; Prescott, C. Y.; Prepost, R.; Moy, A. M.
PUB. DATE
September 2004
SOURCE
Applied Physics Letters;9/27/2004, Vol. 85 Issue 13, p2640
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Spin-polarized electron photoemission has been studied for GaAs/GaAsl-xPx strained superlattice cathodes grown by gas-source molecular beam epitaxy. The superlattice structural parameters are systematically varied to optimize the photoemission characteristics. The heavy-hole and light-hole transitions are reproducibly observed in quantum efficiency spectra, enabling direct measurement of the band energies and the energy splitting. Electron-spin polarization as high as 86% with over 1% quantum efficiency has been observed.
ACCESSION #
14546575

 

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