Home >

news Help

Publication Information


Title
Japanese: 
English:Excitonic gain and laser emission in ZnO microcrystallites at room temperature 
Author
Japanese: Yu Ping, 湯 子康, Wong Goerge K. L., 川崎 雅司, 大友 明, 鯉沼 秀臣, 瀬川 勇三朗.  
English: P. Yu, Z. K. Tang, G. K. L. Wong, M. Kawasaki, A. Ohtomo, H. Koinuma, Y. Segawa.  
Language English 
Journal/Book name
Japanese: 
English:Physics of Low-Dimensional Structures 
Volume, Number, Page Vol. 1-2        pp. 243-251
Published date Dec. 1998 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL <Go to ISI>://000072938400033
 
Abstract Ultraviolet laser emission is observed at room temperature in ZnO thin films consisting of hexagonal microcrystallites. At moderate pumping intensities, the optical gain responsible for lasing is shown to be due to an exciton-exciton collision process. At higher pumping intensities, optical gain due to EHP recombination radiation sets in and dominates the gain spectrum eventually. The exciton emission intensity is observed to depend on the size of the microcrystallites as a result of the weak confinement effect.

©2007 Institute of Science Tokyo All rights reserved.