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| Presentation | 2012-10-25 13:00 Investigation of cavity mode of terahertz oscillator using Bi-2212 intrinsic Josephson junctions Hiroshi Katada, Takashi Tachiki, Takashi Uchida (NDA)  SCE2012-17 Link to ES Tech. Rep. Archives: SCE2012-17 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In order to realize antenna-coupled terahertz (THz) -wave oscillators using intrinsic Josephson junctions (IJJs) for high power generation, cavity-resonant modes were evaluated from radiation frequencies of a oscillator part consisting of IJJs. A rectangular Bi2Sr2CaCu2O8+δ (Bi-2212) mesa with 80 μm *140 μm *1.0 μm, which acts as a cavity for THz plasma oscillation, was fabricated. Several peaks in the detected voltage of a Si-bolometer were observed in the return branch in an I-V characteristic of the fabricated device. At each of two bias points where the peaks appeared in a high bias region, the radiation frequency had different values, which were 499 GHz and 650 GHz at 30 K. These frequencies were corresponding to the resonant frequencies for TE111 and TE121 modes, respectively. Moreover, the radiation frequencies decreased with increasing a bath temperature, and the frequency shifts in the range from 20 to 40 K were 30-40 GHz. This can be qualitatively explained by a decrease in the mode velocity of the Josephson plasma with increasing the temperature. These results are useful to design and fabricate the antenna-coupled THz-wave oscillators. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Josephson junction / terahertz wave / oscillator / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 262, SCE2012-17, pp. 1-6, Oct. 2012. | |
| Paper # | SCE2012-17 | |
| Date of Issue | 2012-10-18 (SCE) | |
| 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 | SCE2012-17 Link to ES Tech. Rep. Archives: SCE2012-17 |
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| Conference Information | |
| Committee | SCE |
| Conference Date | 2012-10-25 - 2012-10-25 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Fundamental Technologies for Superconducting Electronics, etc. |
| Paper Information | |
| Registration To | SCE |
| Conference Code | 2012-10-SCE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation of cavity mode of terahertz oscillator using Bi-2212 intrinsic Josephson junctions |
| Sub Title (in English) | |
| Keyword(1) | Josephson junction |
| Keyword(2) | terahertz wave |
| Keyword(3) | oscillator |
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| 1st Author's Name | Hiroshi Katada |
| 1st Author's Affiliation | National Defense Academy (NDA) |
| 2nd Author's Name | Takashi Tachiki |
| 2nd Author's Affiliation | National Defense Academy (NDA) |
| 3rd Author's Name | Takashi Uchida |
| 3rd Author's Affiliation | National Defense Academy (NDA) |
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| Speaker | Author-1 |
| Date Time | 2012-10-25 13:00:00 |
| Presentation Time | 25 minutes |
| Registration for | SCE |
| Paper # | SCE2012-17 |
| Volume (vol) | vol.112 |
| Number (no) | no.262 |
| Page | pp.1-6 |
| #Pages | 6 |
| Date of Issue | 2012-10-18 (SCE) |
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