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

doi:10.1063/1.1315340

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

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158 Citations (Scopus)

Abstract

We report on the observation of stimulated emission in ZnO/Mg_xZn_1-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.

Original language	English
Pages (from-to)	2204-2206
Number of pages	3
Journal	Applied Physics Letters
Volume	77
Issue number	14
DOIs	https://doi.org/10.1063/1.1315340
Publication status	Published - 2000 Oct 2
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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

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/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.",

author = "A. Ohtomo and K. Tamura and M. Kawasaki and T. Makino and Y. Segawa and Tang, {Z. K.} and Wong, {G. K.L.} and Y. Matsumoto and H. Koinuma",

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language = "English",

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TY - JOUR

T1 - Room-temperature stimulated emission of excitons in ZnO/(Mg,Zn)O superlattices

AU - Ohtomo, A.

AU - Tamura, K.

AU - Kawasaki, M.

AU - Makino, T.

AU - Segawa, Y.

AU - Tang, Z. K.

AU - Wong, G. K.L.

AU - Matsumoto, Y.

AU - Koinuma, H.

PY - 2000/10/2

Y1 - 2000/10/2

N2 - 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.

AB - 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.

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DO - 10.1063/1.1315340

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JO - Applied Physics Letters

JF - Applied Physics Letters

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

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