| Presentation | 1998/7/3 Direct measurement of intersubband energy relaxation time in InGaAs / AlAs quantum wells : ultrafast all-optical modulation utilizing short wavelength intersubband transitions Takashi Asano, Katsuhiro Tomoda, Susumu Noda, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Intersubband transition (ISB-T) in quantum well has been drawing much attention due to its unique properties such as ultrafast relaxation time. We have proposed and demonstrated ultrafast all-optical modulator utilizing the ISB-T. In addition, we have shortened the ISB-T wavelength (up to 1.9～2.8μm) for practical applications. In this report, we show the first direct measurement result of the energy relaxation time in the short wavelength ISB-T. One color pump & probe measurements are performed, and the energy relaxation time of 2.5μm ISB-T is shown to be ～2.7ps. Discussion of the relaxation process are carried out from the view point of the dependence of relaxation time on transition wavelength. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | intersubband transition / short wavelength / all-optical modulation / relaxation time |
| Paper # | OPE98-42,LQE98-36 |
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| Conference Information | |
| Committee | LQE |
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| Conference Date | 1998/7/3(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) | Direct measurement of intersubband energy relaxation time in InGaAs / AlAs quantum wells : ultrafast all-optical modulation utilizing short wavelength intersubband transitions |
| Sub Title (in English) | |
| Keyword(1) | intersubband transition |
| Keyword(2) | short wavelength |
| Keyword(3) | all-optical modulation |
| Keyword(4) | relaxation time |
| 1st Author's Name | Takashi Asano |
| 1st Author's Affiliation | Dept. of Electrical Science and Engineering, Kyoto University() |
| 2nd Author's Name | Katsuhiro Tomoda |
| 2nd Author's Affiliation | Dept. of Electrical Science and Engineering, Kyoto University |
| 3rd Author's Name | Susumu Noda |
| 3rd Author's Affiliation | Dept. of Electrical Science and Engineering, Kyoto University |
| Date | 1998/7/3 |
| Paper # | OPE98-42,LQE98-36 |
| Volume (vol) | vol.98 |
| Number (no) | 167 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |