Development of low emitance and short pulse photocathode

2013 Fiscal Year Final Research Report

• Project/Area Number: 23760310
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: Nagoya University
• Principal Investigator: JIN Xiuguang 名古屋大学, 高等研究院, 特任助教 (20594055)
• Project Period (FY): 2011 – 2012
• Keywords: 半導体フォトカソード

Research Abstract

Photoemission from several types of AlGaAs based photocathodes has been studied. Graded AlGaAs photocathode with an internal electric field showed short response time and high quantum efficiency. Diffusion model combined with electron drift was developed to describe electron transport in graded AlGaAs layers. Our result demonstrated that the internal electric field is effective to control electron transport. The effect of the band structure on the emittance of the electron beam was also investigated. In the graded AlGaAs photocathode, the emittance was dependent on the topmost active layer

Research Products

• [Journal Article] Nano-scale characterization of GaAsP/GaAs strained superlattice structure by nano-beam electron diffraction (2014)
  • Author(s): X.G. J in, H. Nakahara, K. Saitoh, N. Tanaka, Y. Takeda
  • Journal Title: Appl. Phys. Lett Volume: 104 Pages: 113106
• [Journal Article] High performance spin-polarized photocathodes using a GaAs/GaAsP strain-compensated superlattice (2013)
  • Author(s): X.G. J in, A. Mano, F. Ichihashi, N. Yamamoto, Y. Takeda
  • Journal Title: Appl. Phys. Express Volume: 6 Pages: 015801
• [Journal Article] Effect of compressive strain relaxation on surface morphology in GaAsP growth on GaP substrate (2013)
  • Author(s): X.G. J in, S. Fuchi, Y. Takeda
  • Journal Title: J. Cryst. Growth Volume: 370 Pages: 204
• [Journal Article] Picosecond electron bunches from GaAs/GaAsP strained superlattice photocathode (2013)
  • Author(s): X.G. J in, S. Matsuba, Y. Honda, T. Miyajima, M. Yamamoto, T. Utiyama, Y. Takeda
  • Journal Title: Ultramicroscopy Volume: 130 Pages: 44-48
• [Journal Article] Temporal Response Measurements of GaAs-Based Photocathodes (2013)
  • Author(s): Y. Honda, S. Matsuba, X.G. J in, T. Miyajima,M. Yamamoto, T. Uchiyama, M. Kuwahara, Y. Takeda
  • Journal Title: Jpn. J. Appl. Phys Volume: 52 Pages: 086401
• [Journal Article] Phase-locking of oscillating images using laser-induced spin-polarized pulse TEM (2013)
  • Author(s): M. Kuwahara, Y. Nambo, S. Kusunoki, X.G. Jin, T. Nakanishi, K. Saitoh, H. Asano, T. Ujihara, Y. Takeda, T. Nakanishi, N. Tanaka
  • Journal Title: Microscopy Advance Access Volume: 62 Pages: 607-614
• [Journal Article] Mean Transverse Energy Measurement of Negative Electron Affinity GaAs-based Photocathode (2012)
  • Author(s): S. Matrsuba, Y. Honda, X.G. J in, T. Miyajima, M. Yamamoto, T. Uchiyama, M. Kuwahara, Y. Takeda
  • Journal Title: Jpn. J. Appl. Phys Volume: 51 Pages: 046402
• [Journal Article] Analysis of thickness modulation in GaAs/GaAsP strained superlattice by TEM observation (2012)
  • Author(s): X.G. J in, H. Nakahara, K. Saitoh, T. Saka, T. Ujihara, N. Tanaka, Y. Takeda, J. Cryst
  • Journal Title: Growth Volume: 353 Pages: 84
• [Journal Article] Fourfold increase of quantum efficiency in highly spin-polarized transmission-type photocathode (2012)
  • Author(s): X.G. J in, F. Ichihashi, A. Mano, N. Yamamoto, Y. Takeda
  • Journal Title: Jpn. J. Appl. Phys Volume: 51 Pages: 108004
• [Journal Article] 30-kV spin-polarized transmission electron microscope using a GaAs-GaAsP strained superlattice photocathode (2012)
  • Author(s): M. Kuwahara, S. Kusunoki, X.G. Jin, T. Nakanishi, Y. Takeda, K. Saitoh, T. Ujihara, H. Asano, N. Tanaka
  • Journal Title: Appl. Phys. Lett Volume: 101 Pages: 033102
• [Presentation] High performance spin-polarized photocathode using GaAs/GaAsP strain-compensated superlattice (2013)
  • Author(s): X.G. J in, N. Yamamoto, A. Mano, M. Yamamoto, Y. Takeda
  • Organizer: 2013 International Workshop on Polarized Sources, Targets & Polarimetry
  • Place of Presentation: The University of Virginia, Charlottesville, USA
  • Year and Date: 20130909-13
• [Presentation] Novel development of very high brightness and highly spin-polarized electron gun with compact 3D spin manipulator for SPLEEM (2013)
  • Author(s): T. Koshikawa, T. Yasue, M. Suzuki, K. Tsuno, S. Goto, X.G. J in, Y. Takeda
  • Organizer: IVC-19/ICSS-15 AND ICN+T
  • Place of Presentation: Paris, France
  • Year and Date: 20130909-13
• [Presentation] Nano-scale characterization of GaAsP/GaAs strained superlattice structures by nano-beam electron diffraction (2013)
  • Author(s): X.G. J in, H. Nakahara, K. Saitoh, N. Tanaka, Y. Takeda
  • Organizer: 17^<th> International Conference on Crystal Growth and Epitaxy
  • Place of Presentation: Mo116, Warsaw, Poland(Poster)
  • Year and Date: 20130811-16
• [Presentation] High performance spin-polarized photocathode using strain compensated superlattice (2012)
  • Author(s): X.G. J in, A. Mano, F. Ichihashi, N. Yamamoto,○Y. Takeda
  • Organizer: 8^<th> international workshop on LEEM/PEEM
  • Place of Presentation: Regal Kowloon Hotel, Hong Kong
  • Year and Date: 20121111-15
• [Presentation] Picosecond electron bunch from GaAs/GaAsP strained superlattice photocathode (2012)
  • Author(s): X.G. J in, S. Matsuba, T. Miyajima, Y. Honda, M. Yamamoto, T. Utiyama, Y. Takeda
  • Organizer: 8^<th> international workshop on LEEM/PEEM
  • Place of Presentation: Regal Kowloon Hotel, Hong Kong(Poster-session)
  • Year and Date: 20121111-15
• [Presentation] Development of high performance photocathodes for microscopy and accelerator (2012)
  • Author(s): X.G. J in, F. Ichihashi, A. Mano, N. Yamamoto, Y. Takeda, M. Yamamoto, T. Miyajima, Y. Honda, T. Uchiyama, S. Matsuba
  • Organizer: Photocathode Physics for Photoinjectors (P3)
  • Place of Presentation: Cornell University, Ithaca, NY, USA
  • Year and Date: 20121008-10
• [Presentation] High performance spin-polarized photocathode for microscopy (2012)
  • Author(s): X.G. J in, F. Ichihashi, A. Mano, N.Yamamoto, M. Suzuki, T. Yasue, T. Koshikawa, N. Tanaka, Y. Takeda
  • Organizer: 14^<th> Joint Vacuum Conference
  • Place of Presentation: Libertas Rixos Hotel, Dubrovnik, Croatia(EMP-O41)
  • Year and Date: 20120604-08
• [Presentation] Effect of compressive strain relaxation on surface morphology in GaAsP growth on GaP substrate (2012)
  • Author(s): X.G. J in, S. Fuchi, Y. Takada
  • Organizer: 16^<th> International Conference on Metal Organic Vapor Phase Epitaxy
  • Place of Presentation: Paradise Hotel, Busan, Korea(TuP-74)
  • Year and Date: 20120520-25
• [Presentation] Effects of mis-orientation of crystal planes on thickness modulation in GaAs/GaAsP strained superlattice (2012)
  • Author(s): X.G. J in, H. Nakahara, K. Saitoh, T. Saka, H. Katruno, N. Tanaka, Y. Takeda
  • Organizer: 16^<th> International Conference on Metal Organic Vapor Phase Epitaxy
  • Place of Presentation: Busan, Korea(WeP-61)
  • Year and Date: 20120520-25
• [Presentation] Initial emittance and temporal response measurement for GaAs based photocathodes (2012)
  • Author(s): S. Matsuba, Y. Honda, T. Miyajima, T. Uchiyama, M. Yamamoto, X.G. J in, Y. Takeda
  • Organizer: International Particle Accelerator Conference 2012, MOPPP035
  • Place of Presentation: Ernest N. Morial onvention Center, New Orleans Louisiana, USA
  • Year and Date: 20120520-25
• [Patent(Industrial Property Rights)] スピン偏極電子発生素子及びその作製方法 (2012)
  • Inventor(s): 金 秀光
  • Industrial Property Rights Holder: 金 秀光,渕 真悟,竹田美和
  • Industrial Property Number: 2012-108186
  • Filing Date: 20120500
• [Patent(Industrial Property Rights)] 半導体フォトカソード (2012)
  • Inventor(s): 金 秀光
  • Industrial Property Rights Holder: 金 秀光,竹田美和,山本将博,宮島 司,本田洋介
  • Industrial Property Number: 2012-221001
  • Filing Date: 20121000