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Paper Abstract and Keywords
Presentation 2013-12-17 10:10
High efficiency THz wave generation from GaP slab waveguide with dielectric cladding layer
Hikari Dezaki, Kensaku Maeda, Yutaka Oyama (Tohoku Univ.) ED2013-102
Abstract (in Japanese) (See Japanese page) 
(in English) Terahertz (THz) wave generation from various Gallium Phosphide (GaP) waveguides has been reported. The present THz generation was based on collinear phase matched difference frequency generation method (DFG) via waveguide effects. Collinear phase matched DFG is attractive in view of compact and highly efficient THz generator. We fabricated dielectric polymer/GaP waveguide structures and THz generation characteristics were shown. THz generation features of this waveguide structure is superior to that of the conventional Air (as a clad)/GaP (as a core) structure. In conventional Air/GaP structure, THz wave extraction from inside the GaP is not efficient due to the internal total reflection in addition with the high propagation loss and large beam divergence angle. In order to overcome these problems, refractive index difference between core and cladding layer should be reduced, then refractive index will change gradually from GaP crystal to air. This waveguide structure was realized by the addition of cladding layer on GaP. Cladding layer is made of UV sensitive polymer for the fabrication of patterned waveguide structures. This has advantage on appropriate refractive index (1.15~1.20) and high transparency (70%~90%) in THz region.
Keyword (in Japanese) (See Japanese page) 
(in English) Terahertz wave / Gallium Phosphide / Deference frequency generation / Non - colliner phase matching / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 357, ED2013-102, pp. 69-74, Dec. 2013.
Paper # ED2013-102 
Date of Issue 2013-12-09 (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 ED2013-102

Conference Information
Committee ED  
Conference Date 2013-12-16 - 2013-12-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Research Institute of Electrical Communication Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Millimeter wave, terahertz wave devices and systems 
Paper Information
Registration To ED 
Conference Code 2013-12-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High efficiency THz wave generation from GaP slab waveguide with dielectric cladding layer 
Sub Title (in English)  
Keyword(1) Terahertz wave  
Keyword(2) Gallium Phosphide  
Keyword(3) Deference frequency generation  
Keyword(4) Non - colliner phase matching  
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1st Author's Name Hikari Dezaki  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Kensaku Maeda  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Yutaka Oyama  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2013-12-17 10:10:00 
Presentation Time 25 minutes 
Registration for ED 
Paper # ED2013-102 
Volume (vol) vol.113 
Number (no) no.357 
Page pp.69-74 
#Pages 6 
Date of Issue 2013-12-09 (ED) 

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