InAlGaAs/AlGaAs Superlattices for Polarized Electron Photocathodes

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Highly efficient emitters of polarized electrons based on the InAlGaAs/AlGaAs superlattice give an optimistic prognosis to explorations of such structures as the sources for accelerators. A new set of these SL structures with minimized conduction band offset was designed and recently tested. A new technology of surface protection in MBE growth leads to a significantly reduced heat-cleaning temperature. At these lowered cleaning temperatures, the thermal degradation of the working structure parameters is avoided. As a result a polarization P of up to 91% at corresponding quantum efficiency (QE) of 0.3% was achieved at room temperature.

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3 pages

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Mamaev, Yu.A.; Subashiev, A.V.; Yashin, Yu.P.; Gerchikov, L.G.; Inst., /St. Petersburg Polytechnic; Maruyama, T. et al. August 15, 2005.

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Highly efficient emitters of polarized electrons based on the InAlGaAs/AlGaAs superlattice give an optimistic prognosis to explorations of such structures as the sources for accelerators. A new set of these SL structures with minimized conduction band offset was designed and recently tested. A new technology of surface protection in MBE growth leads to a significantly reduced heat-cleaning temperature. At these lowered cleaning temperatures, the thermal degradation of the working structure parameters is avoided. As a result a polarization P of up to 91% at corresponding quantum efficiency (QE) of 0.3% was achieved at room temperature.

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3 pages

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  • Contributed to 13th International Symposium on Nanostructures: Physics and Technology, St. Petersburg, Russia, 20-25 Jun 2005

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  • Report No.: SLAC-PUB-11403
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 878779
  • Archival Resource Key: ark:/67531/metadc879243

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  • August 15, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 29, 2016, 2:54 p.m.

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Mamaev, Yu.A.; Subashiev, A.V.; Yashin, Yu.P.; Gerchikov, L.G.; Inst., /St. Petersburg Polytechnic; Maruyama, T. et al. InAlGaAs/AlGaAs Superlattices for Polarized Electron Photocathodes, article, August 15, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc879243/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.