| Presentation | 2017-11-30 Optical properties of AlGaN quantum wires formed on AlN with macrostep surface Minehiro Hayakawa, Yuki Hayashi, Yuki Nagase, Shuhei Ichikawa, Kyosuke Kumamoto, Mami Shibaoka, Mitsuru Funato, Yoichi Kawakami, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Extensive studies on AlGaN/Al(Ga)N quantum wells recently achieved the commercialization of deep-ultraviolet LEDs. However, the internal quantum efficiency (IQE) is still lower than that of InGaN-based visible LEDs especially under weak excitation and Al-rich condition. To solve this problem, we have proposed AlGaN quantum wires (QWRs) using vicinal AlN surface with macrosteps. In this paper, we investigate the optical properties of AlGaN QWRs by photoluminescence spectroscopy (PL). Time-resolved PL at room temperature suggests that the nonradiative lifetime of AlGaN QWRs is much longer than that of AlGaN/Al(Ga)N QWs, which results in the improvement of the emission efficiency at room temperature. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | AlGaN / Quantum wires / Time-resolved photoluminescence / Nonradiative lifetime |
| Paper # | ED2017-52,CPM2017-95,LQE2017-65 |
| Date of Issue | 2017-11-23 (ED, CPM, LQE) |
| Conference Information | |
| Committee | LQE / CPM / ED |
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| Conference Date | 2017/11/30(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Inst. tech. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Nitride Semiconductor Devices, Materials, Related Technologies |
| Chair | Tsuyoshi Yamamoto(Fujitsu Labs.) / Fumihiko Hirose(Yamagata Univ.) / Kunio Tsuda(Toshiba) |
| Vice Chair | Kiichi Hamamoto(Kyusyu Univ.) / Mayumi Takeyama(Kitami Inst. of Tech.) / Michihiko Suhara(TMU) |
| Secretary | Kiichi Hamamoto(Tohoku Univ.) / Mayumi Takeyama(SEI) / Michihiko Suhara(Nihon Univ.) |
| Assistant | Yasumasa Kawakita(Furukawa Electric Industries) / Naoki Fujiwara(NTT) / Yuichi Akage(NTT) / Toshiyuki Oishi(Saga Univ.) / Tatsuya Iwata(TUT) |
| Paper Information | |
| Registration To | Technical Committee on Lasers and Quantum Electronics / Technical Committee on Component Parts and Materials / Technical Committee on Electron Devices |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Optical properties of AlGaN quantum wires formed on AlN with macrostep surface |
| Sub Title (in English) | |
| Keyword(1) | AlGaN |
| Keyword(2) | Quantum wires |
| Keyword(3) | Time-resolved photoluminescence |
| Keyword(4) | Nonradiative lifetime |
| 1st Author's Name | Minehiro Hayakawa |
| 1st Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 2nd Author's Name | Yuki Hayashi |
| 2nd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 3rd Author's Name | Yuki Nagase |
| 3rd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 4th Author's Name | Shuhei Ichikawa |
| 4th Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 5th Author's Name | Kyosuke Kumamoto |
| 5th Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 6th Author's Name | Mami Shibaoka |
| 6th Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 7th Author's Name | Mitsuru Funato |
| 7th Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 8th Author's Name | Yoichi Kawakami |
| 8th Author's Affiliation | Kyoto University(Kyoto Univ.) |
| Date | 2017-11-30 |
| Paper # | ED2017-52,CPM2017-95,LQE2017-65 |
| Volume (vol) | vol.117 |
| Number (no) | ED-331,CPM-332,LQE-333 |
| Page | pp.pp.15-18(ED), pp.15-18(CPM), pp.15-18(LQE), |
| #Pages | 4 |
| Date of Issue | 2017-11-23 (ED, CPM, LQE) |