Search Results - "KOGUCHI, N"

Fabrication of Multiple Concentric Nanoring Structures by Somaschini, C, Bietti, S, Koguchi, N, Sanguinetti, S

“…We present the fabrication of GaAs/AlGaAs Multiple (from three to five) concentric nanoring structures by an innovative growth method based on droplet epitaxy…”
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Nanometer-scale GaAs ring structure grown by droplet epitaxy by Mano, T., Koguchi, N.

“…Nanometer-scale GaAs ring structure is self-assembly realized by droplet epitaxy in a lattice-matched system. By changing the As 4 flux intensity during the…”
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Optical transitions in quantum ring complexes by KURODA, T, MANO, T, OCHIAI, T, SANGUINETTI, S, SAKODA, K, KIDO, G, KOGUCHI, N

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Shape control via surface reconstruction kinetics of droplet epitaxy nanostructures by Somaschini, C., Bietti, S., Koguchi, N., Sanguinetti, S.

“…We present the fabrication and discuss the growth dynamics of two classes of GaAs quantum nanostructures fabricated by droplet epitaxy, namely, double rings…”
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Self-assembly of laterally aligned GaAs quantum dot pairs by Yamagiwa, M., Mano, T., Kuroda, T., Tateno, T., Sakoda, K., Kido, G., Koguchi, N., Minami, F.

“…The authors report the fabrication of self-assembled, strain-free Ga As ∕ Al 0.27 Ga 0.73 As quantum dot pairs which are laterally aligned in the growth plane,…”
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Ring-shaped GaAs quantum dot laser grown by droplet epitaxy: Effects of post-growth annealing on structural and optical properties by Mano, T., Kuroda, T., Mitsuishi, K., Yamagiwa, M., Guo, X.-J., Furuya, K., Sakoda, K., Koguchi, N.

“…We investigated the effects of post-growth annealing on structural and optical properties of self-assembled ring-shaped GaAs quantum dots (QDs) by…”
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Spectral diffusion and line broadening in single self-assembled GaAs∕AlGaAs quantum dot photoluminescence by Abbarchi, M., Troiani, F., Mastrandrea, C., Goldoni, G., Kuroda, T., Mano, T., Sakoda, K., Koguchi, N., Sanguinetti, S., Vinattieri, A., Gurioli, M.

“…We experimentally and theoretically investigate the photoluminescence broadening of different excitonic complexes in single self-assembled GaAs∕AlGaAs quantum…”
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Self-assembled GaAs islands on Si by droplet epitaxy by Somaschini, C., Bietti, S., Koguchi, N., Montalenti, F., Frigeri, C., Sanguinetti, S.

“…We presented an innovative fabrication technique for the self-assembly of GaAs islands on Si substrates by droplet epitaxy. The islands show highly tunable…”
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Lasing in GaAs∕AlGaAs self-assembled quantum dots by Mano, T., Kuroda, T., Yamagiwa, M., Kido, G., Sakoda, K., Koguchi, N.

“…The authors have demonstrated photopumped laser action of self-assembled ring-shaped GaAs quantum dots (QDs) grown by droplet epitaxy. Morphological control of…”
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Concentric Multiple Rings by Droplet Epitaxy: Fabrication and Study of the Morphological Anisotropy by Somaschini, C, Bietti, S, Fedorov, A, Koguchi, N, Sanguinetti, S

“…We present the Molecular Beam Epitaxy fabrication of complex GaAs/AlGaAs nanostructures by Droplet Epitaxy, characterized by the presence of concentric…”
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Outer zone morphology in GaAs ring/disk nanostructures by droplet epitaxy by Somaschini, C., Bietti, S., Fedorov, A., Koguchi, N., Sanguinetti, S.

“…We present the molecular beam epitaxy (MBE) fabrication of GaAs ring/disk nanostructures. In this system, a central quantum ring is surrounded by a flat outer…”
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Photocatalytic properties of titanium dioxide sputtered on a nanostructured substrate by Turkevych, I., Pihosh, Y., Goto, M., Kasahara, A., Tosa, M., Kato, S., Takehana, K., Takamasu, T., Kido, G., Koguchi, N.

“…The effective one-step physical approach is demonstrated for the fabrication of anatase titanium dioxide nanotubes through r.f. magnetron sputtering of TiO 2…”
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Individual GaAs quantum emitters grown on Ge substrates by Cavigli, L., Abbarchi, M., Bietti, S., Somaschini, C., Sanguinetti, S., Koguchi, N., Vinattieri, A., Gurioli, M.

“…We report on the nucleation of low density and defect-free GaAs quantum dots (QDs) on Ge substrates. The growth of III-V nanostructures was realized via…”
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Temperature dependence of the photoluminescence of InGaAs/GaAs quantum dot structures without wetting layer by Sanguinetti, S., Mano, T., Oshima, M., Tateno, T., Wakaki, M., Koguchi, N.

“…We analyze the photoluminescence temperature behavior of InGaAs/GaAs quantum dots grown by heterogeneous droplet epitaxy. Morphologically, these dots are…”
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Self-assembled GaAs local artificial substrates on Si by droplet epitaxy by Bietti, S., Somaschini, C., Koguchi, N., Frigeri, C., Sanguinetti, S.

“…The fabrication of submicrometer GaAs islands directly on Si substrates by droplet epitaxy is presented. Islands parameters, like density and size, are fully…”
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Modified droplet epitaxy GaAs/AlGaAs quantum dots grown on a variable thickness wetting layer by Sanguinetti, S., Watanabe, K., Tateno, T., Gurioli, M., Werner, P., Wakaki, M., Koguchi, N.

“…We show that the use of modified droplet epitaxy allows to tune the wetting layer thickness in GaAs quantum dot structures. Morphological observations…”
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Excitonic and biexcitonic decoherence in self-assembled GaAs quantum dots as observed by phase-locked interferography by Kuroda, K., Kuroda, T., Sakoda, K., Watanabe, K., Koguchi, N., Kido, G.

“…We observe single-photon interferograms for emission of a single self-assembled GaAs quantum dot. A phase stabilizer is applied to the interferometer, enabling…”
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Final-state readout of exciton qubits by observing resonantly excited photoluminescence in quantum dots by Kuroda, K., Kuroda, T., Watanabe, K., Mano, T., Sakoda, K., Kido, G., Koguchi, N.

“…The authors report on an approach to detect excitonic qubits in semiconductor quantum dots by observing spontaneous emissions from the relevant qubit level…”
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Effects of post-growth annealing on the optical properties of self-assembled GaAs/AlGaAs quantum dots by Sanguinetti, S, Watanabe, K, Kuroda, T, Minami, F, Gotoh, Y, Koguchi, N

“…Photoluminescence spectroscopy is used to analyze the effects of post-growth thermal annealing on the electronic properties and capture processes of…”
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Role of the wetting layer in the carrier relaxation in quantum dots by Sanguinetti, S., Watanabe, K., Tateno, T., Wakaki, M., Koguchi, N., Kuroda, T., Minami, F., Gurioli, M.

“…We present picosecond time resolved photoluminescence measurements of GaAs/AlGaAs quantum dot structures—grown by modified droplet epitaxy—where no wetting…”
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