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Paper Abstract and Keywords
Presentation 2009-07-21 13:25
Numerical investigation of electromagnetic radiation from current-biased intrinsic Josephson junctions
Takashi Tachiki, Takashi Uchida (NDA) SCE2009-10
Abstract (in Japanese) (See Japanese page) 
(in English) In order to investigate Terahertz radiation from Bi-2212 intrinsic Josephson Junctions under a bias current flow, we have performed a numerical simulation of radiation properties of junction stacks with two different sizes; a number of junctions and junction length. For the three-junction stack with its length of $0.026\lambda_c$, $\lambda_c$ being the c-axis magnetic penetration depth, distinct voltage jumps indicating in-phase and out-of-phase cavity resonance of the Josephson plasma occurred in the return curve of an I-V characteristic, and a radiation power of emitting waves reached the maximum in a bias region corresponding to the in-phase resonance. Moreover, the emitting waves generated by the in-phase resonance exhibited monochromatic spectra, compared with those generated by the out-of-phase resonance. On the other hand, for the 50-junction stack with $0.321\lambda_c$, the radiation power was significantly enhanced by the in-phase resonance, while the increase in power suppressed in bias regions corresponding to the out-of-phase resonances with the low plasma-velocity modes. The maximum power was approximately 150 higher than that of the three-junction stack. These facts are useful for designing a Terahertz oscillator using the intrinsic Josephson junctions.
Keyword (in Japanese) (See Japanese page) 
(in English) Bi-2212 / Intrinsic Josephson Junction / sine-Gordon equation / Terahertz wave / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 141, SCE2009-10, pp. 7-12, July 2009.
Paper # SCE2009-10 
Date of Issue 2009-07-14 (SCE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee SCE  
Conference Date 2009-07-21 - 2009-07-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Junctions and materials, etc. 
Paper Information
Registration To SCE 
Conference Code 2009-07-SCE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Numerical investigation of electromagnetic radiation from current-biased intrinsic Josephson junctions 
Sub Title (in English)  
Keyword(1) Bi-2212  
Keyword(2) Intrinsic Josephson Junction  
Keyword(3) sine-Gordon equation  
Keyword(4) Terahertz wave  
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Keyword(6)  
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1st Author's Name Takashi Tachiki  
1st Author's Affiliation National Defense Academy (NDA)
2nd Author's Name Takashi Uchida  
2nd Author's Affiliation National Defense Academy (NDA)
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Speaker Author-1 
Date Time 2009-07-21 13:25:00 
Presentation Time 25 minutes 
Registration for SCE 
Paper # SCE2009-10 
Volume (vol) vol.109 
Number (no) no.141 
Page pp.7-12 
#Pages 6 
Date of Issue 2009-07-14 (SCE) 

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