Y
Yasuaki Masumoto
Researcher at University of Tsukuba
Publications - 369
Citations - 7459
Yasuaki Masumoto is an academic researcher from University of Tsukuba. The author has contributed to research in topics: Quantum dot & Photoluminescence. The author has an hindex of 40, co-authored 369 publications receiving 7212 citations. Previous affiliations of Yasuaki Masumoto include Chinese Academy of Sciences.
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Visible photoluminescence of Ge microcrystals embedded in SiO2 glassy matrices
TL;DR: In this paper, the average radius of the Ge microcrystals in SiO2 was determined by means of Raman spectroscopy and high resolution electron microscope, which is consistent with quantum confinement of electrons and holes.
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Microstructure and optical properties of free-standing porous silicon films: Size dependence of absorption spectra in Si nanometer-sized crystallites.
Yoshihiko Kanemitsu,Hiroshi Uto,Yasuaki Masumoto,Takahiro Matsumoto,Toshiro Futagi,Hidenori Mimura +5 more
TL;DR: Spectroscopic analysis strongly suggests that the photogeneration of carriers occurs in the c-Si core, whose band gap is modified by the quantum-confinement effect, while the strong PL comes from the near-surface region of small crystallites.
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Effect of ZnS shell thickness on the phonon spectra in CdSe quantum dots
Alexander V. Baranov,Yury P. Rakovich,John F. Donegan,Tatiana S. Perova,R. A. Moore,Dmitri V. Talapin,Andrey L. Rogach,Yasuaki Masumoto,Igor Nabiev +8 more
TL;DR: In this article, the evolution of the optical phonon spectra of colloidal core/shell CdSe/ZnS quantum dots with an increase of the shell thickness from 0.5 to 3.4 monolayers has been studied by resonant Raman spectroscopy.
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On the origin of visible photoluminescence in nanometer-size Ge crystallites
TL;DR: In this paper, the authors studied the origin of visible photoluminescence of Ge nanocrystals in SiO2 glassy matrix using high-resolution electron microscopic studies.
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Direct observation of the electron spin relaxation induced by nuclei in quantum dots.
P. F. Braun,Xavier Marie,Laurent Lombez,Bernhard Urbaszek,Thierry Amand,Pierre Renucci,V. K. Kalevich,K. V. Kavokin,Olivier Krebs,Paul Voisin,Yasuaki Masumoto +10 more
TL;DR: This efficient electron spin relaxation mechanism in semiconductor InAs/GaAs quantum dots can be suppressed by an external magnetic field as small as 100 mT.