| Presentation | 2007-06-29 Intersubband transition in GaN/AlN multiple quantum disk nanocolumns Kaiichi Tanaka, Keita Ikuno, Yohei Kasai, Kazuya Fukunaga, Hideyuki Kunugita, Kazuhiro Ema, Akihiko Kikuchi, Katsumi Kishino, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The electronic relaxation process of intersubband transition (ISBT) in semiconductor quantum wells is extremely fast due to strong electron-phonon interactions. ISBT has attracted a lot of attention as a good candidate for all-optical switching devices, because of its speed and tunability to the optical communication wavelengths of 1.2～1.6μm. The GaN-based ISBT has the issue that owing to lattice mismatch between GaN(AlN) and the sapphire substrate, the GaN/AlN epitaxial layer exhibits high-density threading dislocations. Self-organized GaN nanocolumns are essentially free of threading dislocations, and a GaN/AlN multiple-quantum disk (MQD) can be inserted into GaN nanocolumns. Therefore, the nanocolumn-ISBT is expected to improve the switching performance. In this study, we investigated the ultrafast relaxation dynamics of ISBT at 1.55 um in GaN/AlN MQD nanocolumns using the degenerate pump probe technique at 1.55μm and confirmed the high-speed performance of the ISBT was preserved. We also estimated the saturation intensity of the nanocolumn ISBT. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | GaN / subband / communication wavelength / quantum well / nanocolumn |
| Paper # | OPE2007-22,LQE2007-23 |
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| Conference Information | |
| Committee | LQE |
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| Conference Date | 2007/6/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Lasers and Quantum Electronics (LQE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Intersubband transition in GaN/AlN multiple quantum disk nanocolumns |
| Sub Title (in English) | |
| Keyword(1) | GaN |
| Keyword(2) | subband |
| Keyword(3) | communication wavelength |
| Keyword(4) | quantum well |
| Keyword(5) | nanocolumn |
| 1st Author's Name | Kaiichi Tanaka |
| 1st Author's Affiliation | Faculty of Science and Technology, Sophia University() |
| 2nd Author's Name | Keita Ikuno |
| 2nd Author's Affiliation | Faculty of Science and Technology, Sophia University |
| 3rd Author's Name | Yohei Kasai |
| 3rd Author's Affiliation | Faculty of Science and Technology, Sophia University |
| 4th Author's Name | Kazuya Fukunaga |
| 4th Author's Affiliation | Faculty of Science and Technology, Sophia University |
| 5th Author's Name | Hideyuki Kunugita |
| 5th Author's Affiliation | Faculty of Science and Technology, Sophia University:CREST, JST |
| 6th Author's Name | Kazuhiro Ema |
| 6th Author's Affiliation | Faculty of Science and Technology, Sophia University:CREST, JST |
| 7th Author's Name | Akihiko Kikuchi |
| 7th Author's Affiliation | Faculty of Science and Technology, Sophia University:CREST, JST |
| 8th Author's Name | Katsumi Kishino |
| 8th Author's Affiliation | Faculty of Science and Technology, Sophia University:CREST, JST |
| Date | 2007-06-29 |
| Paper # | OPE2007-22,LQE2007-23 |
| Volume (vol) | vol.107 |
| Number (no) | 125 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |