| Presentation | 2000/6/14 Modulation-Doped Quantum Dot Infrared Photodetector : Structure, Responsivity, Spectra S.-W. Lee, K. Hirotani, Ph. Lelong, K. Hirakawa, H. Sakaki, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have systematically investigated the dependence of the photoexcited carrier lifetimes, τ, on the distance between the heterointerface and the QD layer, d, in the modulation-doped quantum dot infared photodetectors (MD-QDIPs). τin a sample with d=60 nm was determined to be as long as 3.2 μs at T=25 K from the temporal waveform of the photocurrent. This long lifetime enables a very high photoconductive gain in MD-QDIPs, demonstrating flexibility and superiority of the MD-QDIPs. It is also found that τ is drastically reduced when T exceeds 70 K, indicating that the recapturing process of the photoexcited carriers into the QDs is enhanced by optical phonon scattering process. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | self-assembled quantum dot / modulation-doped QDIP (MD-QDIP) |
| Paper # | LQE2000-18 |
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| Conference Information | |
| Committee | LQE |
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| Conference Date | 2000/6/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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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) | Modulation-Doped Quantum Dot Infrared Photodetector : Structure, Responsivity, Spectra |
| Sub Title (in English) | |
| Keyword(1) | self-assembled quantum dot |
| Keyword(2) | modulation-doped QDIP (MD-QDIP) |
| 1st Author's Name | S.-W. Lee |
| 1st Author's Affiliation | Institute of lndustrial Science, University of Tokyo:CREST JST() |
| 2nd Author's Name | K. Hirotani |
| 2nd Author's Affiliation | Institute of lndustrial Science, University of Tokyo |
| 3rd Author's Name | Ph. Lelong |
| 3rd Author's Affiliation | Institute of lndustrial Science, University of Tokyo |
| 4th Author's Name | K. Hirakawa |
| 4th Author's Affiliation | Institute of lndustrial Science, University of Tokyo:CREST JST |
| 5th Author's Name | H. Sakaki |
| 5th Author's Affiliation | Institute of lndustrial Science, University of Tokyo |
| Date | 2000/6/14 |
| Paper # | LQE2000-18 |
| Volume (vol) | vol.100 |
| Number (no) | 115 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |