Papers - USAMI Noritaka
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Reflectance anisotropies of compressively strained Si grown on vicinal Si1-xCx(001)
R. E. Balderas-Navarro, N. A. Ulloa-Castillo, K. Arimoto, G. Ramirez-Melendez, L. F. Lastras-Martinez, H. Furukawa, J. Yamanaka, A. Lastras-Martinez, J. M. Flores-Camacho, N. Usami, D. Stifter and K. Hingerl
Applied Physics Letters Vol. 102 ( 1 ) 2013.1
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Evaluation of potential variations around grain boundaries in BaSi2 epitaxial films by Kelvin probe force microscopy Open Access
M.Baba, S.Tsurekawa, K.Watanabe, W.Du, K.Toko, K.O.Hara, N.Usami, T.Sekiguchi and T.Suemasu
Applied Physics Letters Vol. 103 page： 142113 2013
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Theory of open-circuit voltage and the driving force of charge separation in pn-junction solar cells
K.O. Hara, N.Usami
Journal of Applied Physics Vol. 114 ( 15 ) page： 153101 2013
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Silicon-Based Light-Emitting Devices Based on Ge Self-Assembled Quantum Dots Embedded in Optical Cavities
X. J. Xu, S. Narusawa, T. Chiba, T. Tsuboi, J. S. Xia, N. Usami, T. Maruizumi and Y. Shiraki
Ieee Journal of Selected Topics in Quantum Electronics Vol. 18 ( 6 ) page： 1830-1838 2012.12
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Influence of Thermal Annealing on the Carrier Extraction in Ge/Si Quantum Dot Solar Cells
T. Tayagaki, N. Usami and Y. Kanemitsu
Japanese Journal of Applied Physics Vol. 51 ( 10 ) 2012.10
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Dependence of crystal orientation in Al-induced crystallized poly-Si layers on SiO2 insertion layer thickness
A. Okada, K. Toko, K. O. Hara, N. Usami and T. Suemasu
Journal of Crystal Growth Vol. 356 page： 65-69 2012.10
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Large-Grain Polycrystalline Silicon Films Formed through Flash-Lamp-Induced Explosive Crystallization
K. Ohdaira, K. Sawada, N. Usami, S. Varlamov and H. Matsumura
Japanese Journal of Applied Physics Vol. 51 ( 10 ) 2012.10
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Realization of Large-Domain Barium Disilicide Epitaxial Thin Film by Introduction of Miscut to Si(111) Substrate
K. O. Hara, N. Usami, K. Toh, K. Toko and T. Suemasu
Japanese Journal of Applied Physics Vol. 51 ( 10 ) 2012.10
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Investigation of the recombination mechanism of excess carriers in undoped BaSi2 films on silicon Open Access
K. O. Hara, N. Usami, K. Toh, M. Baba, K. Toko and T. Suemasu
Journal of Applied Physics Vol. 112 ( 8 ) 2012.10
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Growth velocity and grain size of multicrystalline solar cell silicon
I. Brynjulfsen, K. Fujiwara, N. Usami and L. Amberg
Journal of Crystal Growth Vol. 356 page： 17-21 2012.10
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Epitaxy of Orthorhombic BaSi2 with Preferential In-Plane Crystal Orientation on Si(001): Effects of Vicinal Substrate and Annealing Temperature
K. Toh, K. O. Hara, N. Usami, N. Saito, N. Yoshizawa, K. Toko and T. Suemasu
Japanese Journal of Applied Physics Vol. 51 ( 9 ) 2012.9
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Enhanced carrier extraction from Ge quantum dots in Si solar cells under strong photoexcitation Open Access
T. Tayagaki, N. Usami, W. G. Pan, Y. Hoshi, K. Ooi and Y. Kanemitsu
Applied Physics Letters Vol. 101 ( 13 ) 2012.9
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Molecular Beam Epitaxy of BaSi2 Films with Grain Size over 4 mu m on Si(111)
M. Baba, K. Nakamura, W. J. Du, M. A. Khan, S. Koike, K. Toko, N. Usami, N. Saito, N. Yoshizawa and T. Suemasu
Japanese Journal of Applied Physics Vol. 51 ( 9 ) 2012.9
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Highly (111)-oriented Ge thin films on insulators formed by Al-induced crystallization
K. Toko, M. Kurosawa, N. Saitoh, N. Yoshizawa, N. Usami, M. Miyao and T. Suemasu
Applied Physics Letters Vol. 101 ( 7 ) 2012.8
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Quantum dot solar cells using 2-dimensional array of 6.4-nm-diameter silicon nanodisks fabricated using bio-templates and neutral beam etching
M. Igarashi, M. F. Budiman, W. G. Pan, W. G. Hu, N. Usami and S. Samukawa
Applied Physics Letters Vol. 101 ( 6 ) 2012.8
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Silicon-based current-injected light emitting diodes with Ge self-assembled quantum dots embedded in photonic crystal nanocavities Open Access
X. J. Xu, T. Tsuboi, T. Chiba, N. Usami, T. Maruizumi and Y. Shiraki
Optics Express Vol. 20 ( 13 ) page： 14714-14721 2012.6
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Investigation of grain boundaries in BaSi2 epitaxial films on Si(111) substrates using transmission electron microscopy and electron-beam-induced current technique
M. Baba, K. Toh, K. Toko, N. Saito, N. Yoshizawa, K. Jiptner, T. Sekiguchi, K. O. Hara, N. Usami and T. Suemasu
Journal of Crystal Growth Vol. 348 ( 1 ) page： 75-79 2012.6
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Simultaneous enhanced photon capture and carrier generation in Si solar cells using Ge quantum dot photonic nanocrystals
N. Usami, W. G. Pan, T. Tayagaki, S. T. Chu, J. S. Li, T. H. Feng, Y. Hoshi and T. Kiguchi
Nanotechnology Vol. 23 ( 18 ) 2012.5
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Room-Temperature Electroluminescence from Ge Quantum Dots Embedded in Photonic Crystal Microcavities
T. Tsuboi, X. J. Xu, J. S. Xia, N. Usami, T. Maruizumi and Y. Shiraki
Applied Physics Express Vol. 5 ( 5 ) 2012.5
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Upper limit of two-dimensional hole gas mobility in strained Ge/SiGe heterostructures
T. Tanaka, Y. Hoshi, K. Sawano, N. Usami, Y. Shiraki and K. M. Itoh
Applied Physics Letters Vol. 100 ( 22 ) 2012.5