| Presentation | 2006-05-19 Performance improvement of spin-polarized electron source based on high quality GaAs/GaAsP strain superlattice structure Toru Ujihara, Bo Chen, Kenichi Yasui, Ryosuke Sakai, Masahiro Yamamoto, Tsutomu Nakanishi, Yoshikazu Takeda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the previous study, we had successfully fabricated the GaAs/GaAsP superlattice spin-polarized electron source with the highest polarization of 92% in the world. However, the quantum efficiency was only 0.5%. In this study, we tried to increase the quantum efficiency by the improvement of crystal quality. First, use of a composition-graded buffer structure decreased defect density due to lattice misfit. Next, using a strain compensated structure, the crystal quality and the periodicity of the superlattice were improved. As a result, the quantum efficiency remarkably increased to 5.2%. However, the strain compensated structure unfortunately degraded the polarization. Finally, the increase of the layer thickness recovered the polarization. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Quantum efficiency / Miniband structure / Strain compensated structure / Graded buffer structure / MOCVD |
| Paper # | ED2006-34,CPM2006-21,SDM2006-34 |
| Date of Issue |
| Conference Information | |
| Committee | CPM |
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| Conference Date | 2006/5/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Component Parts and Materials (CPM) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance improvement of spin-polarized electron source based on high quality GaAs/GaAsP strain superlattice structure |
| Sub Title (in English) | |
| Keyword(1) | Quantum efficiency |
| Keyword(2) | Miniband structure |
| Keyword(3) | Strain compensated structure |
| Keyword(4) | Graded buffer structure |
| Keyword(5) | MOCVD |
| 1st Author's Name | Toru Ujihara |
| 1st Author's Affiliation | Graduate School of Engineering, Nagoya University() |
| 2nd Author's Name | Bo Chen |
| 2nd Author's Affiliation | Graduate School of Engineering, Nagoya University |
| 3rd Author's Name | Kenichi Yasui |
| 3rd Author's Affiliation | Graduate School of Science, Nagoya University |
| 4th Author's Name | Ryosuke Sakai |
| 4th Author's Affiliation | Graduate School of Science, Nagoya University |
| 5th Author's Name | Masahiro Yamamoto |
| 5th Author's Affiliation | Graduate School of Science, Nagoya University |
| 6th Author's Name | Tsutomu Nakanishi |
| 6th Author's Affiliation | Graduate School of Science, Nagoya University |
| 7th Author's Name | Yoshikazu Takeda |
| 7th Author's Affiliation | Graduate School of Engineering, Nagoya University |
| Date | 2006-05-19 |
| Paper # | ED2006-34,CPM2006-21,SDM2006-34 |
| Volume (vol) | vol.106 |
| Number (no) | 46 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |