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Title
Japanese: 
English:Room-temperature stimulated emission of excitons in ZnO/(Mg, Zn)O superlattices 
Author
Japanese: 大友 明, 田村 謙太郎, 川崎 雅司, 牧野 哲征, 瀬川 勇三朗, 湯 子康, Wong Goerge K. L., 松本祐司, 鯉沼 秀臣.  
English: A. Ohtomo, K. Tamura, M. Kawasaki, T. Makino, Y. Segawa, Z. K. Tang, G. K. L. Wong, Y. Matsumoto, H. Koinuma.  
Language English 
Journal/Book name
Japanese: 
English:Applied Physics Letters 
Volume, Number, Page Vol. 77    No. 14    pp. 2204-2206
Published date Oct. 2000 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
File
Official URL <Go to ISI>://000089524900042
 
DOI https://doi.org/10.1063/1.1315340
Abstract We report on the observation of stimulated emission in ZnO/MgxZn1-xO superlattices well above room temperature. Two kinds of superlattices grown by laser molecular-beam epitaxy showed clear systematics on the quantum subband levels in absorption and spontaneous emission spectra. Stimulated emission with excitonic origin could be observed at very low optical pumping levels. The threshold excitation intensity changed from 11 to 40 kW/cm(2), and the emission energy could be tuned between 3.2 and 3.4 eV, depending on the well thickness and/or the Mg content in the barrier layers. The excitonic stimulated emission could be observed up to 373 K and the characteristic temperature was as high as 87 K.

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