Polarized Electron Emission From Strained GaAs / GaAsP Superlattice Photocathodes

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Spin-polarized electron photoemission has been studied for GaAs/GaAs{sub 1-x}P{sub x} 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.

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5 pages

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Maruyama, T.; Luh, D.; Brachmann, A.; Clendenin, J.E.; Garwin, E.L.; Harvey, S. et al. March 1, 2006.

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Spin-polarized electron photoemission has been studied for GaAs/GaAs{sub 1-x}P{sub x} 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.

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5 pages

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  • Prepared for International Workshop on Polarized Electron Sources and Polarimeters (PESP 2004), Mainz, Germany, 7-9 Oct 2004

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  • Report No.: SLAC-PUB-11725
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 876766
  • Archival Resource Key: ark:/67531/metadc877278

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  • March 1, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 30, 2016, 4:59 p.m.

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Maruyama, T.; Luh, D.; Brachmann, A.; Clendenin, J.E.; Garwin, E.L.; Harvey, S. et al. Polarized Electron Emission From Strained GaAs / GaAsP Superlattice Photocathodes, article, March 1, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc877278/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.