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Paper Abstract and Keywords
Presentation 2008-12-20 12:30
THz Signal Converted from Optical Signal by Photogenerated Carrier
Yuki Numajiri, Ryo Yokoyama, Mizuki Shirao, Nobuhiko Nishiyama, Masahiro Asada, Shigehisa Arai (Tokyo Tech) ED2008-197
Abstract (in Japanese) (See Japanese page) 
(in English) A novel method of signal media conversion from optical signal to Terahertz (THz) signal by the skin effect and the free-carrier absorption using photon generated free-carriers in semiconductor was proposed and demonstrated. Free carriers which generated by photon absorption absorb THz waves due to the skin effect and free-carrier absorption. By changing light power irradiated into the semiconductor, THz power passing through the semiconductor can be changed. Using this phenomenon, intensity modulation of THz waves can be realized. The modulator 2-μm thickness intrinsic GaInAs grown on semi-insulating InP substrate and 1.55 μm wavelength light was used. In this letter, using 192 GHz continuous sub-THz wave and 1.55 μm optical signal, the modulation depth of 45% and the modulated speed up to 2 MHz were demonstrated.
Keyword (in Japanese) (See Japanese page) 
(in English) terahertz / free carrier absorption / skin effect / semiconductor laser / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 369, ED2008-197, pp. 65-70, Dec. 2008.
Paper # ED2008-197 
Date of Issue 2008-12-12 (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 ED2008-197

Conference Information
Committee ED  
Conference Date 2008-12-19 - 2008-12-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Millimeter-wave, THz-wave Devices and Systems 
Paper Information
Registration To ED 
Conference Code 2008-12-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) THz Signal Converted from Optical Signal by Photogenerated Carrier 
Sub Title (in English)  
Keyword(1) terahertz  
Keyword(2) free carrier absorption  
Keyword(3) skin effect  
Keyword(4) semiconductor laser  
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Keyword(6)  
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1st Author's Name Yuki Numajiri  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Ryo Yokoyama  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Mizuki Shirao  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
4th Author's Name Nobuhiko Nishiyama  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
5th Author's Name Masahiro Asada  
5th Author's Affiliation Tokyo Institute of Technology, Quantum Nanoelectronics Research Center (Tokyo Tech)
6th Author's Name Shigehisa Arai  
6th Author's Affiliation Tokyo Institute of Technology, Quantum Nanoelectronics Research Center (Tokyo Tech)
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Speaker Author-1 
Date Time 2008-12-20 12:30:00 
Presentation Time 25 minutes 
Registration for ED 
Paper # ED2008-197 
Volume (vol) vol.108 
Number (no) no.369 
Page pp.65-70 
#Pages 6 
Date of Issue 2008-12-12 (ED) 

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