Room-temperature stimulated emission of excitons in ZnO/(Mg,Zn)O superlattices

A. Ohtomo, K. Tamura, M. Kawasaki, T. Makino, Y. Segawa, Z. K. Tang, G. K.L. Wong, Y. Matsumoto, H. Koinuma

研究成果: Article査読

249 被引用数 (Scopus)

抄録

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/cm2, 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.

本文言語English
ページ(範囲)2204-2206
ページ数3
ジャーナルApplied Physics Letters
77
14
DOI
出版ステータスPublished - 2000 10 2
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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