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| 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 Link to ES Tech. Rep. Archives: ED2008-197 |
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| 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 Link to ES Tech. Rep. Archives: ED2008-197 |
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| 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 |
| Keyword(5) | |
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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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