Yoshiaki Araki

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The concept of band engineering dilute nitride semiconductors into nanowires is introduced. Using plasma-assisted molecular beam epitaxy, dilute nitride GaAsN/GaAs heterostructure nanowires are grown on silicon (111) substrates. Growth of the nanowires under high As overpressure results in a regular wire diameter of 350 nm with a length exceeding 3 μm. The(More)
In this paper, we investigate the common unfolding between regular tetrahedra and Johnson-Zalgaller solids. More precisely, we investigate the sets of all edge developments of Johnson-Zalgaller solids that fold into regular tetrahedra. We show that, among 92 Johnson-Zalgaller solids, only J17 (gyroelongated square dipyramid) and J84 (snub disphenoid) have(More)
Let Γ be a 3-dimensional Kleinian punctured torus group with accidental parabolic transformations. The deformation space of Γ in the group of Möbius transformations on the 2-sphere is well-known as the Maskit slice M1,1 of punctured torus groups. In this paper, we study deformations Γ of Γ in the group of Möbius transformations on the 3-sphere such that Γ(More)
Let Γ be a 3-dimensional Kleinian punctured torus group with accidental parabolic transformations. The deformation space of Γ in the group of Möbius transformations on the 2-sphere is well known as the Maskit slice M1,1 of punctured torus groups. In this paper, we study deformations Γ′ of Γ in the group of Möbius transformations on the 3-sphere such that Γ′(More)
This paper reports experiments of materializing recent new discovered mathematical surfaces, 3D quasi-Fuchsian fractals. Three different models in glass, plastic, and metal are created to realize rich mathematical properties including selfsimilarity, 3-embeddable, simply-connected, and complicated surface consisting of infinite number of cusps. Different(More)
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