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Paper Abstract and Keywords
Presentation 2020-11-27 14:50
Internal quantum efficiency and excitonic stimulated emission properties of AlGaN-based UV-C multiple quantum wells
Hideaki Murotani (NIT, Tokuyama Coll.), Ryohei Tanabe, Keisuke Hisanaga, Akira Hamada, Kanta Beppu (Yamaguchi Univ.), Noritoshi Maeda, M. Ajmal Khan, Masafumi Jo, Hideki Hirayama (RIKEN), Yoichi Yamada (Yamaguchi Univ.) ED2020-23 CPM2020-44 LQE2020-74
Abstract (in Japanese) (See Japanese page) 
(in English) Internal quantum efficiency (IQE) and stimulated emission properties of AlGaN-based UV-C multiple quantum wells have been studied by means of photoluminescence spectroscopy. The IQE was estimated to be 53% at room temperature and 16% at 750 K. Furthermore, optically pumped stimulated emission was clearly observed at room temperature. The threshold excitation power density was estimated to be 13 kW/cm2 at 10 K and 69 kW/cm2 at room temperature. The temperature dependence of the threshold excitation power density suggested that the optical gain formation mechanism changed from excitonic transition processes to degenerated electron-hole plasma between 200 and 250 K.
Keyword (in Japanese) (See Japanese page) 
(in English) UV-C / internal quantum efficiency / Stimulated emission / exciton / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 256, LQE2020-74, pp. 87-90, Nov. 2020.
Paper # LQE2020-74 
Date of Issue 2020-11-19 (ED, CPM, LQE) 
ISSN 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 ED2020-23 CPM2020-44 LQE2020-74

Conference Information
Committee LQE CPM ED  
Conference Date 2020-11-26 - 2020-11-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To LQE 
Conference Code 2020-11-LQE-CPM-ED 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Internal quantum efficiency and excitonic stimulated emission properties of AlGaN-based UV-C multiple quantum wells 
Sub Title (in English)  
Keyword(1) UV-C  
Keyword(2) internal quantum efficiency  
Keyword(3) Stimulated emission  
Keyword(4) exciton  
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Keyword(6)  
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1st Author's Name Hideaki Murotani  
1st Author's Affiliation National Institute of Technology, Tokuyama College (NIT, Tokuyama Coll.)
2nd Author's Name Ryohei Tanabe  
2nd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
3rd Author's Name Keisuke Hisanaga  
3rd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
4th Author's Name Akira Hamada  
4th Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
5th Author's Name Kanta Beppu  
5th Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
6th Author's Name Noritoshi Maeda  
6th Author's Affiliation RIKEN (RIKEN)
7th Author's Name M. Ajmal Khan  
7th Author's Affiliation RIKEN (RIKEN)
8th Author's Name Masafumi Jo  
8th Author's Affiliation RIKEN (RIKEN)
9th Author's Name Hideki Hirayama  
9th Author's Affiliation RIKEN (RIKEN)
10th Author's Name Yoichi Yamada  
10th Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker Author-1 
Date Time 2020-11-27 14:50:00 
Presentation Time 20 minutes 
Registration for LQE 
Paper # ED2020-23, CPM2020-44, LQE2020-74 
Volume (vol) vol.120 
Number (no) no.254(ED), no.255(CPM), no.256(LQE) 
Page pp.87-90 
#Pages 4 
Date of Issue 2020-11-19 (ED, CPM, LQE) 

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