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| Presentation | 2010-12-16 16:25 Nonequilibrium Carrier Relaxation Dynamics in Optically Pumped Graphene and Population Inversion in Terahertz Range Akira Satou (Tohoku Univ.), Victor Ryzhii (Univ. of Aizu), Stephane Boubanga-Tombet, Taiichi Otsuji (Tohoku Univ.)  ED2010-163 Link to ES Tech. Rep. Archives: ED2010-163 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We study theoretically the population inversion in terahertz (THz) frequency in intrinsic graphene under optical pulse excitation. We develop the theoretical model of carrier relaxation dynamics based on the quasi-classi- cal Boltzmann equation taking into account the quasi-equilibration by the carrier-carrier (CC) scattering and the energy relaxation and recombination by the intra and interband optical phonon (OP) scattering. Using the model developed, we demonstrate that the population inversion can be achieved under the pulse excitation, due to the imbalance between the energy relaxation by the intraband OP emission and the recombination by the interband OP emission. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Graphene / Terahertz wave / Laser / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 342, ED2010-163, pp. 31-34, Dec. 2010. | |
| Paper # | ED2010-163 | |
| Date of Issue | 2010-12-09 (ED) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | ED2010-163 Link to ES Tech. Rep. Archives: ED2010-163 |
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| Conference Information | |
| Committee | ED |
| Conference Date | 2010-12-16 - 2010-12-17 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tohoku University (Research Institute of Electrical Communication) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Millimeter wave, terahertz devices and systems |
| Paper Information | |
| Registration To | ED |
| Conference Code | 2010-12-ED |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Nonequilibrium Carrier Relaxation Dynamics in Optically Pumped Graphene and Population Inversion in Terahertz Range |
| Sub Title (in English) | |
| Keyword(1) | Graphene |
| Keyword(2) | Terahertz wave |
| Keyword(3) | Laser |
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| 1st Author's Name | Akira Satou |
| 1st Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 2nd Author's Name | Victor Ryzhii |
| 2nd Author's Affiliation | University of Aizu (Univ. of Aizu) |
| 3rd Author's Name | Stephane Boubanga-Tombet |
| 3rd Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 4th Author's Name | Taiichi Otsuji |
| 4th Author's Affiliation | Tohoku University (Tohoku Univ.) |
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| Speaker | Author-1 |
| Date Time | 2010-12-16 16:25:00 |
| Presentation Time | 25 minutes |
| Registration for | ED |
| Paper # | ED2010-163 |
| Volume (vol) | vol.110 |
| Number (no) | no.342 |
| Page | pp.31-34 |
| #Pages | 4 |
| Date of Issue | 2010-12-09 (ED) |
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