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595 results on '"Sakoda, K."'

53. Tight-binding analysis of the electronic states in AlAs with N isoelectronic impurities.

Author

Jo, M., Mano, T., Sakuma, Y., and Sakoda, K.

Subjects
ATOMIC spectroscopy, ELECTRIC conductivity, OPTICAL devices, NONMETALS, PHOTOELECTRONS
Abstract

Incorporation of nitrogen (N) atoms into III-V semiconductors significantly changes their electronic structures. The aim of this study was to assess the electronic states in AlAs that contained N impurities. An sp3s* tight-binding model along with valence-force-field strain calculations were used to obtain the energy levels in N-doped AlAs. The calculations showed that an isolated N atom formed a resonant state above the conduction band edge in AlAs. In contrast, NN1[110] and NN4[220] pairs formed bound states inside the band gap. The formation of two bound states was consistent with the photoluminescence spectrum of N δ-doped AlAs. [ABSTRACT FROM AUTHOR]

Published
2014
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56. Shape control of quantum dots studied by cross-sectional scanning tunneling microscopy.

Author

Keizer, J. G., Bozkurt, M., Bocquel, J., Mano, T., Noda, T., Sakoda, K., Clark, E. C., Bichler, M., Abstreiter, G., Finley, J. J., Lu, W., Rohel, T., Folliot, H., Bertru, N., and Koenraad, P. M.

Subjects
QUANTUM dots, SCANNING tunneling microscopy, WETTING, INDIUM, GALLIUM arsenide
Abstract

In this cross-sectional scanning tunneling microscopy study we investigated various techniques to control the shape of self-assembled quantum dots (QDs) and wetting layers (WLs). The result shows that application of an indium flush during the growth of strained InGaAs/GaAs QD layers results in flattened QDs and a reduced WL. The height of the QDs and WLs could be controlled by varying the thickness of the first capping layer. Concerning the technique of antimony capping we show that the surfactant properties of Sb result in the preservation of the shape of strained InAs/InP QDs during overgrowth. This could be achieved by both a growth interrupt under Sb flux and capping with a thin GaAsSb layer prior to overgrowth of the uncapped QDs. The technique of droplet epitaxy was investigated by a structural analysis of strain free GaAs/AlGaAs QDs. We show that the QDs have a Gaussian shape, that the WL is less than 1 bilayer thick, and that minor intermixing of Al with the QDs takes place. [ABSTRACT FROM AUTHOR]

Published
2011
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57. Poissonian statistics of excitonic complexes in quantum dots.

Author

Abbarchi, M., Mastrandrea, C., Kuroda, T., Mano, T., Vinattieri, A., Sakoda, K., and Gurioli, M.

Subjects
QUANTUM dots, GALLIUM arsenide semiconductors, EXCITON theory, POISSON distribution, MATHEMATICAL physics
Abstract

We report a detailed experimental investigation of the power dependence of excitonic complexes (neutral exciton, neutral biexciton, and charged exciton) confined in single self-assembled GaAs/AlGaAs strain-free quantum dots grown by droplet epitaxy. By using the random population theory we show that, under stationary excitation, the power dependence of the excitonic complexes precisely follows the Poissonian statistics. This result allows us to determine with great accuracy the state filling condition of the quantum dots (QDs) and therefore to estimate the capture volume of the QDs. [ABSTRACT FROM AUTHOR]

Published
2009
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59. Treatment of a Vertebral Dissecting Aneurysm with a Balloon-Expandable Stent and Guglielmi Detachable Coils

Author

Toshinori Nakahara, Kaoru Kurisu, Sakoda K, and Yano T

Subjects
medicine.medical_specialty, business.industry, medicine.medical_treatment, Vertebral artery, Stent, Parent artery, Original Articles, Stent deformation, medicine.disease, 030218 nuclear medicine & medical imaging, Surgery, 03 medical and health sciences, 0302 clinical medicine, Balloon expandable stent, Aneurysm, Posterior inferior cerebellar artery, medicine.artery, cardiovascular system, medicine, cardiovascular diseases, Radiology, Surgical treatment, business, 030217 neurology & neurosurgery
Abstract

A 43-year-old man with dissecting vertebral artery aneurysm presented with subarachnoid haemorrhage. The vertebral angiography showed a fusiform dilatation at the right intracranial vertebral artery between the origin of posterior inferior cerebellar artery and the vertebral union. After failing conservative therapy, a balloon-expandable stent was placed at intracranial vertebral artery, in a manner such that the entire dissecting aneurysm was covered. On follow-up angiogram, we recognized regrowth of theresidual aneurysm and stent deformation. The parent artery was occluded completely with several Guglielmi detachable coils. Brainstem dysfunction or rebleeding of the aneurysm were not encountered. Recently stenting therapy was deployed for a patient with dissecting aneurysm of the extracranial carotid or vertebral artery who was not a candidate for surgical treatment. We discuss the feasibilities and limitations of stent therapy.

Published
1999

63. General lectures (II)

Author

Segawa, K., Nakazawa, S., Koide, N., Imai, K., Matsuo, N., Yamamoto, Y., Shiobara, M., Shimada, H., Kawai, K., Machida, K., Okabe, N., Hoshi, Y., Koizumi, Y., Watanuki, T., Hiroshima, Y., Matsusaka, Y., Katase, K., Sakuma, Y., Matoba, N., Murata, N., Toyama, Y., Murai, S., Nukaga, A., Ishimatsu, N., Watanabe, Y., Abe, M., Ono, Y., Hirai, K., Iwabuchi, S., Suzuki, K., Aoki, T., Masamura, K., Yoshida, K., Ikeuchi, J., Nagao, F., Kobayashi, A., Toriie, S., Nakajima, M., Kohli, M., Ida, K., Kawai, K., Masuda, M., Hattori, T., Fujita, S., Tamada, T., Inoue, K., Usui, T., Yamaya, S., Ohtsuka, K., Shiraki, Y., Fujishima, S., Tochikubo, O., Miyamoto, S., Ueda, A., Asano, K., Kunisada, M., Miyake, H., Fujii, Y., Yoshimoto, S., Hiramatsu, K., Nakano, S., Takeda, T., Kitamura, K., Horiguchi, Y., Okada, K., Okada, M., Kuwabara, T., Tanaka, M., Konno, K., Hattori, T., Isobe, K., Iwasaki, A., Unoura, T., Matsumoto, M., Yoshida, T., Takahashi, I., Abe, M., Maeda, H., Hayashi, T., Koizumi, H., Iwasaki, M., Takahashi, K., Honda, T., Ariga, K., Mohri, S., Suga, Y., Ono, T., Kobayashi, K., Mizuno, T., Sameshima, Y., Shiozaki, Y., Sasakawa, M., Hiramatsu, A., Ikehara, K., Nagata, T., Tatsumi, K., Abe, M., Aoki, M., Iwasaki, S., Aizawa, T., Kajiwara, K., Sata, K., Omata, S., Imamura, K., Kondo, K., Sajima, H., Sato, Y., Kiryu, H., Mimoto, S., Masuoka, T., Kira, K., Mizumoto, R., Kuratsuka, H., Honjo, I., Hojo, Y., Nakajima, H., Tosaka, T., Arai, O., Kobayashi, N., Obata, N., Ito, S., Takaoka, T., Uragami, Y., Kitamura, Y., Kishi, S., Fujii, S., Okuda, H., Hirano, K., Kano, H., Ogino, M., Ueda, Y., Nishiwaki, K., Iwamura, N., Aoki, T., Hiramatsu, K., Kamada, T., Suematsu, T., Fusamoto, H., Okuda, H., Abe, H., Katayama, S., Yamaguchi, K., Fukuda, M., Ishii, T., Kaito, I., Sato, S., Sasaki, H., Onodera, H., Yamanaka, M., Akagi, K., Miyazaki, S., Okumura, M., Omae, T., Nakamura, Y., Wada, M., Nakai, Y., Inoue, S., Arima, T., Yamasaki, S., Takano, T., Katsuta, Y., Yano, T., Isoda, K., Aramaki, T., Fukuda, N., Ichikawa, T., Okumura, H., Adachi, Y., Inoue, R., Iwasaki, Y., Tanaka, S., Yamamoto, T., Wakisaka, G., Nakaya, H., Takase, S., Ikegami, F., Takada, A., Kobayashi, K., Takeuchi, J., Kato, Y., Funayama, A., Kakumu, S., Ito, S., Okuyama, S., Taoka, Y., Endo, T., Chizuka, R., Yanagida, T., Chizuka, S., Usui, H., Ando, T., Takai, T., Wakahara, T., Kojima, M., Fukazawa, T., Takahashi, Y., Miyamura, S., Urakawa, T., Shima, T., Miyaji, K., Okazaki, T., Kashimura, S., Koyama, K., Yamauchi, H., Matsuo, Y., Takagi, Y., Muto, I., Owada, Y., Otowa, T., Sato, T., Naito, C., Okada, K., Sugawara, K., Nokiba, T., Fujii, Y., Kido, H., Sasaki, M., Sugai, Y., Nishimura, G., Nanbu, H., Kamiyama, Y., Yamada, T., Yamaoka, Y., Takeda, H., Ohsawa, T., Kamano, T., Mizukami, T., Kitamura, O., Ozawa, K., Takasan, H., Honjo, I., Miyasaki, R., Katayama, T., Amakawa, T., Hirose, K., Furukawa, Y., Noguchi, M., Okamoto, M., Maezawa, H., Tanaka, N., Yamada, S., Hisata, T., Hata, C., Sawa, J., Kato, Y., Mituda, Y., Oohira, S., Hayasaka, A., Okuyama, T., Fukui, S., Takeda, T., Furuichi, T., Yamamitsu, S., Yamauchi, K., Konishi, Y., Maeda, S., Setoyama, S., Otsuji, S., Ibata, T., Niu, H., Ogawa, A., Tujioka, E., Maeda, T., Takewa, M., Matumoto, T., Tamada, K., Maeda, A., Sumita, H., Iseki, Y., Yukawa, S., Nitta, Y., Isida, K., Nomoto, H., Setoyama, S., Maeda, S., Otsuji, S., Sato, R., Sato, G., Toyokawa, S., Yamamoto, G., Ohtomi, S., Haga, M., Ueno, Y., Fukuda, M., Endo, R., Yokota, T., Ohsawa, J., Kohno, A., Ohtoshi, E., Yasugi, H., Ichikawa, H., Mizumoto, R., Honjo, I., Ando, K., Suzuki, H., Nishiwaki, T., Kishimoto, T., Miki, T., Takeshige, K., Sawada, M., Hidemura, R., Yamamoto, S., Itoh, S., Kashiwagi, T., Kishida, M., Imamura, O., Suematus, T., Kamada, T., Sakoda, K., Kawada, T., Arima, Y., Kamimura, T., Takesue, M., Katsuki, T., Akita, H., Yakeishi, Y., Takehisa, I., Miyasato, K., Yoshida, H., Hidemura, R., Kubota, K., Aoki, S., Suzuki, S., Kishimoto, T., Miyahara, T., Ando, K., Nishiwaki, T., Miki, T., Takeshige, K., Sawada, M., Itoh, S., Yamamoto, S., Fujiwara, K., Sakai, T., Oda, T., Igarashi, S., Fukuhara, M., Tsujii, T., Tamura, T., Matsuoka, Y., Takahashi, H., Sakamoto, T., Fukuda, S., Oku, M., Matsui, T., Morita, T., Oyazato, Y., Kimura, K., Moriya, W., Fukui, S., Suzuki, K., Morimoto, S., Tsuiki, S., Shoji, K., Nakai, Y., Hata, M., Kubo, J., Yoshizawa, K., Nagayama, K., Ozawa, Y., Yoshida, M., Horiguchi, M., Machii, A., Nitta, Y., Aiso, Y., Kitahara, N., Kitazawa, E., Fukuda, K., Saiti, N., Murakami, Y., Nao, Y., Okazaki, I., Funatsu, K., Maruyama, K., Takagi, B., Yasuraoka, S., Ishii, K., Matsuzaki, S., Takahashi, H., Ishii, H., Kamegaya, K., Sambe, K., Ishikawa, H., Tajima, Y., Kuroda, A., Ishihara, Y., Sato, N., Ishikawa, I., Noro, T., Kakumoto, Y., Mekjian, H. S., Thomford, N. R., Yokomura, T., Adachi, S., Yamamoto, A., Saito, I., Kawamura, A., Miyata, M., Kasai, S., Kawanishi, N., Tamaki, A., Mito, M., Kasai, Y., Hasumi, A., Uchiyama, T., Tachikawa, Y., Takanashi, T., Kanke, T., Matsuda, K., Takanashi, T., Kanke, T., Matsuda, K., Hamana, G., Sakuma, M., Sugita, T., Tomita, K., Yamasaki, S., Tsuzuki, T., Uekusa, M., Matsuzaki, M., Takagi, B., Tsuchiya, M., Uchimura, M., Murohisa, T., Muto, Y., Ishigaki, J., Waki, S., Tsuchiya, R., Sho, M., Furukawa, M., Suzuki, N., Nagashima, H., Matsushiro, T., Saitoh, T., Nakamura, N., Hatanaka, T., Kobayashi, N., Nakamura, Y., Sato, T., Tooi, K., Tanaka, Y., Kadokura, N., Okada, Y., Yanakgi, I., Tanaka, N., Sekiya, V. M., Adachi, K., Miyashita, M., Moriyama, Y., Onda, M., Yoshioka, M., Teraoka, T., Shimizu, Y., Fujishima, G., Ookawa, K., Miki, M., Shirota, A., Aihara, K., Shiga, T., Sano, H., Hayashi, S., Hori, M., Sato, H., Chuman, Y., Tsukase, S., Nakahara, N., Ehira, S., Setoyama, S., Nishimata, H., Irisa, T., Tokutome, K., Nakashima, Y., Koga, H., Yokoyama, H., Otsuji, T., Chujo, Y., Yamamoto, T., Gotoda, S., Uchiyama, S., Kosaki, G., Ohkura, H., Mukojima, T., Hattori, N., Sasaki, O., Soejima, K., Inokuchi, K., Utsunomiya, J., Maki, T., Iwama, T., Matsunaga, Y., Shimomura, T., Nakajima, T., Ichikawa, S., Miyanaga, T., Sengoku, K., Hamaguchi, E., Aoki, N., Nomura, T., Matsuoka, A., Suzuki, N., Nagahama, A., Kazumi, T., Miyawaki, H., Sakamoto, T., Miyasaki, K., Kato, K., Miyazaki, Y., Harada, N., Yamada, K., Tashiro, S., Sakai, K., Ho, N., Murayama, H., Yada, M., Sakabe, T., Shimizu, H., Kuroki, M., Nishida, S., Kato, K., Ishiyama, S., Yukawa, K., Hayashi, M., Soh, K., Doi, K., Fukuda, M., Nakagawa, A., Yukawa, E., Uematsu, Y., Nara, K., Hattori, H., Watanabe, M., Yoshida, H., Sato, K., Okuse, S., Sato, K., Murotani, T., Takasu, S., Konta, M., Uchiya, T., Fujimaki, N., Yoshida, K., Yoshikawa, K., Uchida, M., Nakamura, N., Nagao, F., Kawana, S., Tamura, K., Hashimoto, T., Kobayashi, K., Hara, T., Nosaka, J., Fukui, O., Inaba, E., Otsukasa, S., Sanada, K., Hiraide, H., Senyo, G., Ootani, A., Nakayama, T., Takei, S., Miki, H., Tanaka, M., Minota, S., Nakayama, K., Nakagawa, K., Shiraishi, T., Kawauchi, H., Nagaya, H., Mizushima, K., Tachimi, Y., Namiki, M., Masuda, K., Mitsutani, N., Mukuta, T., Koizumi, T., Takeuchi, T., Nemoto, T., Takabayashi, H., Takagi, M., Hongo, Y., Kojima, H., Nishimura, M., Hino, S., Hirayama, J., Nakamura, M., Irisa, T., Koga, S., Hirayama, C., Kikuch, S., Ito, M., Hidano, S., Ooya, T., Banno, H., Tomura, A., Kato, K., Koyama, T., Takei, T., Tomimura, T., Yamauchi, M., Kobayashi, K., Nakaya, Y., Takase, S., Kato, Y., Takeuchi, J., Ikegami, F., Matsuda, Y., Takada, A., Udo, K., Kojima, M., Hukuda, N., Kametani, M., Miyagawa, T., Wakahara, T., Takahashi, Y., Imaeda, T., Senda, K., Fujita, S., Okubo, H., Kanoda, K., Miyashita, B., Ishizuka, H., Goto, T., Oto, K., Kaneda, H., Hase, M., Matsuda, J., Kawai, T., Ikehara, H., Baba, S., Ishii, M., Tozawa, T., Inoue, E., Mizuno, N., Saeki, S., Nakaji, T., Narabayashi, T., Okuno, T., Yamada, H., Tanno, M., Chiba, K., Iio, M., Shibata, K., Furuhashi, F., Mizuochi, K., Ohashi, S., Kato, K., Nakano, M., Otsuka, S., Irie, M., Akima, M., Maruyama, Y., Oyamada, F., Nagata, E., Kubo, Y., Arishima, T., Otsuyama, Y., Kaneto, A., Shimogawa, Y., Tanigawa, K., Okabe, N., Nakajima, K., Onishi, S., Kasahara, A., Shimizu, T., Ikehara, Y., Tajima, H., Okamoto, A., Komibuchi, T., Negoro, T., Nihonsugi, A., Ishii, M., Tozawa, T., Ogawa, Y., Otani, H., Ishida, M., Yashima, H., Shoji, K., Tsuiki, S., Morimoto, S., Nakai, Y., Ryo, M., Ozawa, Y., Tanaka, T., Horiguchi, M., Taketa, K., Watanabe, A., Yumoto, Y., Tanaka, A., Takesue, A., Aoe, H., Ueda, M., Shimamura, J., Kosaka, K., Kashiwara, E., Orita, K., Konaga, E., Suzuki, K., Tanaka, S., Kaneda, S., Ogawa, K., Tamura, H., Okanishi, S., Ueda, T., Horie, H., Kamachi, M., Asihara, T., Daido, R., Izumi, T., Kurihara, M., Sumida, M., Haraikawa, M., Hayakawa, H., Shirakabe, H., Yasui, A., Noguchi, M., Okamoto, M., Furukawa, Y., Miyasaki, R., Hirose, K., Katayama, T., and Maezawa, H.

Published
1974
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72. Fiber-optic magnetometry with randomly oriented spins

Author

Fedotov, I. V., primary, Doronina-Amitonova, L. V., additional, Sidorov-Biryukov, D. A., additional, Safronov, N. A., additional, Levchenko, A. O., additional, Zibrov, S. A., additional, Blakley, S., additional, Perez, H., additional, Akimov, A. V., additional, Fedotov, A. B., additional, Hemmer, P., additional, Sakoda, K., additional, Velichansky, V. L., additional, Scully, M. O., additional, and Zheltikov, A. M., additional

Published
2014
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79. Charge tuning in [111] grown GaAs droplet quantum dots

Author

Bouet, L., primary, Vidal, M., additional, Mano, T., additional, Ha, N., additional, Kuroda, T., additional, Durnev, M. V., additional, Glazov, M. M., additional, Ivchenko, E. L., additional, Marie, X., additional, Amand, T., additional, Sakoda, K., additional, Wang, G., additional, and Urbaszek, B., additional

Published
2014
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87. Self-assembly of triangular quantum dots on (111)A substrates by droplet epitaxy.

Author

Jo, M., Mano, T., Abbarchi, M., Kuroda, T., and Sakoda, K.

Subjects
NANOSTRUCTURED materials, GALLIUM arsenide, QUANTUM dots, MOLECULAR beam epitaxy, MOLECULAR self-assembly, SUBSTRATES (Materials science)
Abstract

We report the self-assembly of triangular GaAs quantum dots (QDs) on (111)A substrates using droplet epitaxy. Shape transition from hexagonal to triangular QDs is observed with increasing crystallizing temperature. The mechanism of the morphological change is discussed in terms of different growth rates of step edges on a (111)A substrate. [ABSTRACT FROM AUTHOR]

Published
2014
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96. Shape Control of QDs Studied by Cross-sectional Scanning Tunneling Microscopy

Author

Keizer, J. G., primary, Bozkurt, M., additional, Bocquel, J., additional, Koenraad, P. M., additional, Mano, T., additional, Noda, T., additional, Sakoda, K., additional, Clark, E. C., additional, Bichler, M., additional, Abstreiter, G., additional, Finley, J. J., additional, Lu, W., additional, Rohel, T., additional, Folliot, H., additional, and Bertru, N., additional

Published
2011
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