| Presentation | 2009-08-11 Growth and characterization of telecom-wavelength quantum dots using Bi as a surfactant Hiroshi OKAMOTO, Takehiko TAWARA, Hideki GOTOH, Hidehiko KAMADA, Tetsuomi SOGAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The effectiveness of adding TMBi during telecom-wavelength-quantum-dot growth on improving its optical quality and extending its emission wavelength is reported. It was confirmed that the Bi acted as a kind of surfactant during the growth. In addition, it was discussed that the origin of the emission-wavelength extension was resembled to "activated spinodal decomposition" reported for MBE grown QDs. Regarding the QD density, it was confirmed that the density was increased by using much higher V/III condition than usual during the growth. As for investigation for increasing the QD-stack number, a dislocation-free multiple QD stack in which each QD was not coupled to the other one located in neighbor layers was obtained by introducing GaAs_<0.72>P_<0.28> strain compensation layers. The special photoluminescence feature observed for this multiple QD-stack sample was discussed with the existence of non-radiative recombination centers. Further investigation of the recombination centers is needed for further improvement of the QD optical quality. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | quantum dot / InAs / InGaAs / telecom wavelength / surfactant / Bi / photoluminescence / TEM / STEM |
| Paper # | CPM2009-46 |
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| Conference Information | |
| Committee | CPM |
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| Conference Date | 2009/8/3(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| 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) | Growth and characterization of telecom-wavelength quantum dots using Bi as a surfactant |
| Sub Title (in English) | |
| Keyword(1) | quantum dot |
| Keyword(2) | InAs |
| Keyword(3) | InGaAs |
| Keyword(4) | telecom wavelength |
| Keyword(5) | surfactant |
| Keyword(6) | Bi |
| Keyword(7) | photoluminescence |
| Keyword(8) | TEM |
| Keyword(9) | STEM |
| 1st Author's Name | Hiroshi OKAMOTO |
| 1st Author's Affiliation | Graduate School of Science and Technology, Hirosaki University() |
| 2nd Author's Name | Takehiko TAWARA |
| 2nd Author's Affiliation | NTT Basic Research Laboratories |
| 3rd Author's Name | Hideki GOTOH |
| 3rd Author's Affiliation | NTT Basic Research Laboratories |
| 4th Author's Name | Hidehiko KAMADA |
| 4th Author's Affiliation | NTT Basic Research Laboratories |
| 5th Author's Name | Tetsuomi SOGAWA |
| 5th Author's Affiliation | NTT Basic Research Laboratories |
| Date | 2009-08-11 |
| Paper # | CPM2009-46 |
| Volume (vol) | vol.109 |
| Number (no) | 171 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |