Y
Y. Segawa
Publications - 46
Citations - 3426
Y. Segawa is an academic researcher. The author has contributed to research in topics: Photoluminescence & Exciton. The author has an hindex of 27, co-authored 46 publications receiving 3333 citations.
Papers
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Journal ArticleDOI
Band gap engineering based on MgxZn1−xO and CdyZn1−yO ternary alloy films
Takahiro Makino,Y. Segawa,Masashi Kawasaki,Akira Ohtomo,R. Shiroki,K. Tamura,Tadashi Yasuda,Hideomi Koinuma +7 more
TL;DR: In this paper, the structural and optical properties of II-VI oxide alloys, MgxZn1−xO and CdyZn 1−yO, grown by pulsed-laser deposition, were described.
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Structure and optical properties of zno/mg0.2zn0.8o superlattices
TL;DR: In this paper, a superlattice structure with a period ranging from 8 to 18 nm was clearly verified by cross-sectional transmission electron microscopy, Auger depth profile, and x-ray diffraction.
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Single crystalline ZnO films grown on lattice-matched ScAlMgO4(0001) substrates
Akira Ohtomo,K. Tamura,K. Saikusa,Kunio Takahashi,Takahiro Makino,Y. Segawa,Hideomi Koinuma,Masashi Kawasaki +7 more
TL;DR: In this paper, lattice-matched (Δa/a=0.09%) ScAlMgO4(0001) substrates were employed to grow single crystalline quality ZnO films by laser molecular-beam epitaxy.
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Correlation between the photoluminescence lifetime and defect density in bulk and epitaxial ZnO
Takashi Koida,Shigefusa F. Chichibu,Akira Uedono,Atsushi Tsukazaki,Masashi Kawasaki,T. Sota,Y. Segawa,Hideomi Koinuma +7 more
TL;DR: In this article, the influence of point defects on the nonradiative processes in ZnO was studied using steady-state and time-resolved photoluminescence (PL) spectroscopy making a connection with the results of positron annihilation measurement.
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Enhancement of exciton binding energies in ZnO/ZnMgO multiquantum wells
Handong Sun,Takayuki Makino,Y. Segawa,Masashi Kawasaki,Akira Ohtomo,K. Tamura,Hideomi Koinuma +6 more
TL;DR: In this article, the effect of confinement on the exciton binding energies has been systematically investigated for two series of ZnO/ZnMgO multiquantum wells with various well widths and barrier heights.