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Paper Abstract and Keywords
Presentation 2012-12-17 15:40
Terahertz Population Inversion in Graphene by Optical Pulse Excitation
Akira Satou, Victor Ryzhii, Yuki Kurita, Taiichi Otsuji (Tohoku Univ.) ED2012-98 Link to ES Tech. Rep. Archives: ED2012-98
Abstract (in Japanese) (See Japanese page) 
(in English) We theoretically studied the nonequilibrium carrier relaxation dynamics and the terahertz population inversion in intrinsic graphene excited by optical pulse. Using the model which takes into account the quasi-equilibration by carrier-carrier scattering, energy relaxation and recombination by optical-phonon emission, and the Pauli blocking of optical pulse absorption, we analyzed the dependence of the achievement of the population inversion on the photon energy of the pulse. It was shown that the threshold pulse fluence required for the population inversion is reduced as the photon energy of the pulse becomes lower, due to the dependence of the photoabsorption by graphene on the photon energy and to the reduction of the carrier heating effect by the photoexcited carriers.
Keyword (in Japanese) (See Japanese page) 
(in English) Graphene / Population inversion / THz laser / Optical pumping / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 364, ED2012-98, pp. 29-33, Dec. 2012.
Paper # ED2012-98 
Date of Issue 2012-12-10 (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 ED2012-98 Link to ES Tech. Rep. Archives: ED2012-98

Conference Information
Committee ED  
Conference Date 2012-12-17 - 2012-12-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Millimeter wave / Terahertz devices and systems 
Paper Information
Registration To ED 
Conference Code 2012-12-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Terahertz Population Inversion in Graphene by Optical Pulse Excitation 
Sub Title (in English)  
Keyword(1) Graphene  
Keyword(2) Population inversion  
Keyword(3) THz laser  
Keyword(4) Optical pumping  
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1st Author's Name Akira Satou  
1st Author's Affiliation Tohoku Unviersity (Tohoku Univ.)
2nd Author's Name Victor Ryzhii  
2nd Author's Affiliation Tohoku Unviersity (Tohoku Univ.)
3rd Author's Name Yuki Kurita  
3rd Author's Affiliation Tohoku Unviersity (Tohoku Univ.)
4th Author's Name Taiichi Otsuji  
4th Author's Affiliation Tohoku Unviersity (Tohoku Univ.)
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Speaker Author-1 
Date Time 2012-12-17 15:40:00 
Presentation Time 25 minutes 
Registration for ED 
Paper # ED2012-98 
Volume (vol) vol.112 
Number (no) no.364 
Page pp.29-33 
#Pages
Date of Issue 2012-12-10 (ED) 


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