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Paper Abstract and Keywords
Presentation 2017-11-30 14:50
Optical properties of AlGaN quantum wires formed on AlN with macrostep surface
Minehiro Hayakawa, Yuki Hayashi, Yuki Nagase, Shuhei Ichikawa, Kyosuke Kumamoto, Mami Shibaoka, Mitsuru Funato, Yoichi Kawakami (Kyoto Univ.) ED2017-52 CPM2017-95 LQE2017-65
Abstract (in Japanese) (See Japanese page) 
(in English) Extensive studies on AlGaN/Al(Ga)N quantum wells recently achieved the commercialization of deep-ultraviolet LEDs. However, the internal quantum efficiency (IQE) is still lower than that of InGaN-based visible LEDs especially under weak excitation and Al-rich condition. To solve this problem, we have proposed AlGaN quantum wires (QWRs) using vicinal AlN surface with macrosteps. In this paper, we investigate the optical properties of AlGaN QWRs by photoluminescence spectroscopy (PL). Time-resolved PL at room temperature suggests that the nonradiative lifetime of AlGaN QWRs is much longer than that of AlGaN/Al(Ga)N QWs, which results in the improvement of the emission efficiency at room temperature.
Keyword (in Japanese) (See Japanese page) 
(in English) AlGaN / Quantum wires / Time-resolved photoluminescence / Nonradiative lifetime / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 333, LQE2017-65, pp. 15-18, Nov. 2017.
Paper # LQE2017-65 
Date of Issue 2017-11-23 (ED, CPM, LQE) 
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 ED2017-52 CPM2017-95 LQE2017-65

Conference Information
Committee LQE CPM ED  
Conference Date 2017-11-30 - 2017-12-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Inst. tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Nitride Semiconductor Devices, Materials, Related Technologies 
Paper Information
Registration To LQE 
Conference Code 2017-11-LQE-CPM-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optical properties of AlGaN quantum wires formed on AlN with macrostep surface 
Sub Title (in English)  
Keyword(1) AlGaN  
Keyword(2) Quantum wires  
Keyword(3) Time-resolved photoluminescence  
Keyword(4) Nonradiative lifetime  
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1st Author's Name Minehiro Hayakawa  
1st Author's Affiliation Kyoto University (Kyoto Univ.)
2nd Author's Name Yuki Hayashi  
2nd Author's Affiliation Kyoto University (Kyoto Univ.)
3rd Author's Name Yuki Nagase  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Shuhei Ichikawa  
4th Author's Affiliation Kyoto University (Kyoto Univ.)
5th Author's Name Kyosuke Kumamoto  
5th Author's Affiliation Kyoto University (Kyoto Univ.)
6th Author's Name Mami Shibaoka  
6th Author's Affiliation Kyoto University (Kyoto Univ.)
7th Author's Name Mitsuru Funato  
7th Author's Affiliation Kyoto University (Kyoto Univ.)
8th Author's Name Yoichi Kawakami  
8th Author's Affiliation Kyoto University (Kyoto Univ.)
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Speaker Author-1 
Date Time 2017-11-30 14:50:00 
Presentation Time 25 minutes 
Registration for LQE 
Paper # ED2017-52, CPM2017-95, LQE2017-65 
Volume (vol) vol.117 
Number (no) no.331(ED), no.332(CPM), no.333(LQE) 
Page pp.15-18 
#Pages 4 
Date of Issue 2017-11-23 (ED, CPM, LQE) 

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