• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2010 Fiscal Year Final Research Report

Generation of highly spin-polarized electron beams by using two-photon excitation process from GaAs semiconductors.

Research Project

  • PDF
Project/Area Number 21740175
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionNagoya University

Principal Investigator

YAMAMOTO Naoto  Nagoya University, 工学研究科, 助教 (60377918)

Project Period (FY) 2009 – 2010
Keywords加速器 / スピン偏極電子源 / ビーム物理 / 半導体
Research Abstract

In case that the laser power was around the threshold power of two photon excitation from GaAs semiconductors, it is found that the measured electron spin polarization (ESP) was only around 20%, which is much lower than estimated value, which is higher than 90%. It is considered that the ESP degradation is caused by the exists of harmonics in excitation laser and impurity energy states in GaAs semiconductors. To obtain higher than 90% ESP, we have to make more complicate researches & developments for laser system and sample preparation.

  • Research Products

    (9 results)

All 2010 2009 Other

All Journal Article (4 results) (of which Peer Reviewed: 3 results) Presentation (4 results) Remarks (1 results)

  • [Journal Article] Strain of GaAs/GaAsP Superlattices Used as Spin-Polarized Electron Photocathodes, Determined by X-Ray Diffraction2010

    • Author(s)
      T.Saka, Y.Ishida, M.Kanda, X.G. Jin, Y.Maeda, S.Fuchi, T.Ujihara, Y.Takeda, T.Matsuyama, H.Horinaka, T.Kato, N.Yamamoto, A.Mano, Y.Nakagawa, M.Kuwahara, S.Okumi, T. Nakanishi, M.Yamamoto, T.Ohshima, T.Kohashi, M.Suzuki, M.Hashimoto, T.Yasue, T.Koshikawa
    • Journal Title

      e-Journal of Surface Science and Nanotechnology 8

      Pages: 125-130

    • Peer Reviewed
  • [Journal Article] Real Time Magnetic Imaging by Spin-Polarized Low Energy Electron Microscopy with Highly Spin-Polarized and High Brightness Electron Gun2010

    • Author(s)
      M.Suzuki, M.Hashimoto, T.Yasue, T.Koshikawa, Y.Nakagawa, A.Mano, N. Yamamoto, M.Yamamoto, T.Konomi, M.Kuwahara, S.Okumi, T.Nakanishi, X.G.Jin, T.Ujihara, Y.Takeda, T. Kohashi, T.Ohshima, T.Saka, T.Kato, H.Horinaka
    • Journal Title

      Applied Physics Express 3

      Pages: 026601

    • Peer Reviewed
  • [Journal Article] High Brightness and high polarization electron source using transmission photocathode2009

    • Author(s)
      N.Yamamoto, X.G.Jin, A.Mano, Y. Nakagawa, T.Nakanishi, T.Ujihara, S.Okumi, M.Yamamoto, T.Konomi, Y.Takeda, T.Ohshima, T.Saka, T.Kato, H.Horinaka, T.Yasue, T. Koshikawa
    • Journal Title

      Proceedings of SPIN 2008 AIP

      Pages: 1052-1056

  • [Journal Article] Status of the high brightness polarized electron source and experimental result as a Spin-LEEM electron source

    • Author(s)
      N.Yamamoto, X.G.Jin, A.Mano, M. Suzuki, M.Hashimoto, T.Yasue, T.Koshikawa, T.Ujihara, Y.Takeda, T.Ohshima, T.Saka, T.Kato, H.Horinaka S.Okumi, T.Nakanishi
    • Journal Title

      Proceedings of SPIN 2010, Journal of Physics : Conference Series, accepted

    • Peer Reviewed
  • [Presentation] Real time observation of growth process of magnetic thin films by SPLEEM with high brightness and high spin-polarized electron source2010

    • Author(s)
      M.Suzuki
    • Organizer
      7th International Symposium on Atomic Level Characterizations for New Materials and Devices (ALC'09)
    • Place of Presentation
      米国
    • Year and Date
      2010-10-06
  • [Presentation] Status of the high brightness polarized electron source and experimental result as a Spin-LEEM electron source2010

    • Author(s)
      N.Yamamoto
    • Organizer
      Workshop on Sources of Polarized Electrons and High Brightness Electron Beams
    • Place of Presentation
      ドイツ
    • Year and Date
      2010-09-23
  • [Presentation] AIGaAs中間層の導入による透過型GaAs/GaAsP歪み超格子スピン偏極フォトカソードの高量子効率化2010

    • Author(s)
      市橋史朗
    • Organizer
      第71回応用物理学会学術講演会
    • Place of Presentation
      長崎大学
    • Year and Date
      2010-09-14
  • [Presentation] 超高輝度・高スピン偏極度フォトカソード2009

    • Author(s)
      金秀光
    • Organizer
      2009年秋第70回応用物理学会学術講演会
    • Place of Presentation
      富山大学
    • Year and Date
      2009-09-11
  • [Remarks] ホームページ等

    • URL

      http://kenpro.mynu.jp:8001/Profiles/0058/0005837/profile.html

URL: 

Published: 2012-02-13   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi