| Presentation | 2009-08-20 Optically pumped circularly polarized lasing in a vertical-cavity surface-emitting laser on GaAs (110) Shinji KOH, Hiroshi FUJINO, Hitoshi KAWAGUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Electron spin polarization in the active layers of semiconductor lasers can lead to circularly polarized lasing via the optical selection rule. Long spin relaxation time (τ_S) is a major advantage for such spin lasers because the spin polarization can be maintained for a long time. From a viewpoint of τ_S, (110)-oriented quantum wells (QWs) have attracted attention because τ_S is one-order of magnitude longer than that in (110)-oriented QWs. We fabricated and characterized a vertical-cavity surface-emitting laser (VCSEL) based on (110)-oriented InGaAs/GaAs QWs. Circularly polarized lasing in the (110) VCSEL by optical injection of spin-polarized electrons has been demonstrated at 77K and room temperature. A high degree of circular polarization, 0.94, was observed at 77K, reflecting the long electron spin relaxation time (～2.8ns) in the (110)-oriented QWs. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Spintronics / Vertical-cavity surface-emitting laser / (110)-oriented quantum well / Circularly polarized lasing |
| Paper # | EMD2009-42,CPM2009-66,OPE2009-90,LQE2009-49 |
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| Committee | EMD |
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| Conference Date | 2009/8/13(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromechanical Devices (EMD) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Optically pumped circularly polarized lasing in a vertical-cavity surface-emitting laser on GaAs (110) |
| Sub Title (in English) | |
| Keyword(1) | Spintronics |
| Keyword(2) | Vertical-cavity surface-emitting laser |
| Keyword(3) | (110)-oriented quantum well |
| Keyword(4) | Circularly polarized lasing |
| 1st Author's Name | Shinji KOH |
| 1st Author's Affiliation | Graduate School of Materials Science, Nara Institute of Science and Technology() |
| 2nd Author's Name | Hiroshi FUJINO |
| 2nd Author's Affiliation | Graduate School of Materials Science, Nara Institute of Science and Technology |
| 3rd Author's Name | Hitoshi KAWAGUCHI |
| 3rd Author's Affiliation | Graduate School of Materials Science, Nara Institute of Science and Technology |
| Date | 2009-08-20 |
| Paper # | EMD2009-42,CPM2009-66,OPE2009-90,LQE2009-49 |
| Volume (vol) | vol.109 |
| Number (no) | 173 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |