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Paper Abstract and Keywords
Presentation 2007-05-25 14:50
Improvement of spin-polarization of strain compenstated GaAs/GaAsP superlattice for polarized electron source
Takanori Kato, Ryosuke Sakai, Masatoshi Tanioku, Yasuhide Nakagawa, Yoshiki Maeda, Syuko Kim, Shingo Fuchi, Masahiro Yamamoto, Toru Ujihara, Tutomu Nakanishi, Yoshikazu Takeda (Nagoya Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Strained superlattice semiconductor is promising for a high performance spin-polarized photocathode. Previously, we prepared a strain compensated superlattice photocathode in order to increase quantum efficiency by the improvement of crystal quality. This structure showed a high quantum efficiency but a low polarization. When electrons are excited in the superlattice, the quantum efficiency increase, step by step, corresponding to the density of states. However, in the strain compensated structure, the quantum efficiency monotonously increased. In addition, the calculated results of band structure indicated the mixture of low polarized electrons excited in the buffer layers reduces the polarization. So, we inserted a barrier layer between the buffer layer and the superlattice. Consequently, the polarization was improved.
Keyword (in Japanese) (See Japanese page) 
(in English) Polarization / Quantum efficiency / Strained superlattice structure / train compensated superlattice structure / / / /  
Reference Info. IEICE Tech. Rep.
Paper #  
Date of Issue  
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee SDM ED CPM  
Conference Date 2007-05-24 - 2007-05-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Shizuoka Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CPM 
Conference Code 2007-05-SDM-ED-CPM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of spin-polarization of strain compenstated GaAs/GaAsP superlattice for polarized electron source 
Sub Title (in English)  
Keyword(1) Polarization  
Keyword(2) Quantum efficiency  
Keyword(3) Strained superlattice structure  
Keyword(4) train compensated superlattice structure  
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1st Author's Name Takanori Kato  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Ryosuke Sakai  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Masatoshi Tanioku  
3rd Author's Affiliation Nagoya University (Nagoya Univ.)
4th Author's Name Yasuhide Nakagawa  
4th Author's Affiliation Nagoya University (Nagoya Univ.)
5th Author's Name Yoshiki Maeda  
5th Author's Affiliation Nagoya University (Nagoya Univ.)
6th Author's Name Syuko Kim  
6th Author's Affiliation Nagoya University (Nagoya Univ.)
7th Author's Name Shingo Fuchi  
7th Author's Affiliation Nagoya University (Nagoya Univ.)
8th Author's Name Masahiro Yamamoto  
8th Author's Affiliation Nagoya University (Nagoya Univ.)
9th Author's Name Toru Ujihara  
9th Author's Affiliation Nagoya University (Nagoya Univ.)
10th Author's Name Tutomu Nakanishi  
10th Author's Affiliation Nagoya University (Nagoya Univ.)
11th Author's Name Yoshikazu Takeda  
11th Author's Affiliation Nagoya University (Nagoya Univ.)
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Speaker
Date Time 2007-05-25 14:50:00 
Presentation Time 20 
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