論文 - 宇佐美 徳隆
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Silicon-based light emitters fabricated by embedding Ge self-assembled quantum dots in microdisks
J. S. Xia, K. Nemoto, Y. Ikegami, Y. Shiraki and N. Usami
Applied Physics Letters 91 巻 ( 1 ) 2007年7月
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SiGe double barrier resonant tunneling diodes on bulk SiGe substrates with high peak-to-valley current ratio
S. Tsujino, N. Usami, A. Weber, G. Mussler, V. Shushunova, D. Grutzmacher, Y. Azuma and K. Nakajima
Applied Physics Letters 91 巻 2007年7月
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Formation mechanism of parallel twins related to Si-facetted dendrite growth
K. Fujiwara, K. Maeda, N. Usami, G. Sazaki, Y. Nose and K. Nakajima
Scripta Materialia 57 巻 ( 2 ) 頁: 81-84 2007年7月
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Application of Czochralski-grown SiGe bulk crystal as a substrate for luminescent strained quantum wells
N. Usami, R. Nihei, I. Yonenaga, Y. Nose and K. Nakajima
Applied Physics Letters 90 巻 ( 18 ) 2007年4月
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Improvement in the conversion efficiency of single-junction SiGe solar cells by intentional introduction of the compositional distribution
M. Tayanagi, N. Usami, W. Pan, K. Ohdaira, K. Fujiwara, Y. Nose and K. Nakajima
Journal of Applied Physics 101 巻 ( 5 ) 2007年3月
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Influence of structural imperfection of Sigma 5 grain boundaries in bulk multicrystalline Si on their electrical activities
K. Kutsukake, N. Usami, K. Fujiwara, Y. Nose and K. Nakajima
Journal of Applied Physics 101 巻 ( 6 ) 2007年3月
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Step-induced anisotropic growth of pentacene thin film crystals on a hydrogen-terminated Si(111) surface
S. Nishikata, G. Sazaki, T. Takeuchi, N. Usami, S. Suto and K. Nakajima
Crystal Growth & Design 7 巻 ( 2 ) 頁: 439-444 2007年2月
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Modification of local structure and its influence on electrical activity of near (310) Sigma 5 grain boundary in bulk silicon
K. Kutsukake, N. Usami, K. Fujiwara, Y. Nose, T. Sugawara, T. Shishido and K. Nakajima
Materials Transactions 48 巻 ( 2 ) 頁: 143-147 2007年2月
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Effect of the compositional distribution on the photovoltaic power conversion of SiGe solar cells
N. Usami, W. Pan, K. Fujiwara, M. Tayanagi, K. Ohdaira and K. Nakajima
Solar Energy Materials and Solar Cells 91 巻 頁: 123-128 2007年1月
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Control of strain status in SiGe thin film by epitaxial growth on Si with buried porous layer
N. Usami, K. Kutsukake, N. Kazuo, S. Amtablian, A. Fave and M. Lemiti
Applied Physics Letters 90 巻 ( 3 ) 2007年1月
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Fabrication of Ge channels with extremely high compressive strain and their magnetotransport properties
K. Sawano, Y. Kunishi, K. Toyama, T. Okamoto, N. Usami, K. Nakagawa and Y. Shiraki
JOURNAL OF CRYSTAL GROWTH 301 巻 頁: 339-342 2007年
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Growth temperature dependence of lattice structures of SiGe/graded buffer structures grown on Si(110) substrates by gas-source MBE
K. Arimoto, J. Yamanaka, K. Nakagawa, K. Sawano, Y. Shiraki, N. Usami and K. Nakajima
J. Cryst. Growth 301 巻 頁: 343-348 2007年
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Annihilation of acceptor-hydrogen pairs in Si crystals due to electron irradiation
M. Suezawa, K. Koilma, A. Kasuya, I. Yonenaga and N. Usami
Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers 45 巻 ( 12 ) 頁: 9162-9166 2006年12月
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Strong resonant luminescence from Ge quantum dots in photonic crystal microcavity at room temperature
J. S. Xia, Y. Ikegami, Y. Shiraki, N. Usami and Y. Nakata
Applied Physics Letters 89 巻 ( 20 ) 2006年11月
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Magnetotransport properties of Ge channels with extremely high compressive strain
K. Sawano, Y. Kunishi, Y. Shiraki, K. Toyama, T. Okamoto, N. Usami and K. Nakagawa
Applied Physics Letters 89 巻 ( 16 ) 2006年10月
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Growth of structure-controlled polycrystalline silicon ingots for solar cells by casting
K. Fujiwara, W. Pan, N. Usami, K. Sawada, M. Tokairin, Y. Nose, A. Nomura, T. Shishido and K. Nakajima
Acta Materialia 54 巻 ( 12 ) 頁: 3191-3197 2006年7月
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High sensitive imaging of atomic arrangement of Ge clusters buried in a Si crystal by X-ray fluorescence holography
S. Kusano, S. Nakatani, K. Sumitani, T. Takahashi, Y. Yoda, N. Usami and Y. Shiraki
Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers 45 巻 ( 6A ) 頁: 5248-5253 2006年6月
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Suppression of structural imperfection in strained Si by utilizing SiGe bulk substrate
N. Usami, Y. Nose, K. Fujiwara and K. Nakajima
Applied Physics Letters 88 巻 2006年5月
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Realization of bulk multicrystalline silicon with controlled grain boundaries by utilizing spontaneous modification of grain boundary configuration
N. Usami, K. Kutsukake, T. Sugawara, K. Fujwara, W. Pan, Y. Nose, T. Shishido and K. Nakajima
Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers 45 巻 ( 3A ) 頁: 1734-1737 2006年3月
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High-efficiency concave and conventional solar cell integration system using focused reflected light
K. Ohdaira, K. Fujiwara, W. Pan, N. Usami and K. Nakajiima
Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers 45 巻 ( 3A ) 頁: 1664-1667 2006年3月