T
Toshiaki Tamamura
Researcher at Nippon Telegraph and Telephone
Publications - 253
Citations - 9216
Toshiaki Tamamura is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Resist & Grating. The author has an hindex of 44, co-authored 253 publications receiving 9067 citations. Previous affiliations of Toshiaki Tamamura include Nikon & NEC.
Papers
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Highly ordered nanochannel-array architecture in anodic alumina
TL;DR: In this paper, a long-range ordered channel array with dimensions on the order of millimeters with a channel density of 1010 cm−2 was obtained, and the aspect ratio was over 150.
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Superprism Phenomena in Photonic Crystals
Hideo Kosaka,Takayuki Kawashima,Akihisa Tomita,Masaya Notomi,Toshiaki Tamamura,Takashi Sato,Shojiro Kawakami +6 more
TL;DR: In this article, a super-prism phenomenon was demonstrated at optical wavelength in photonic crystals with three-dimensional-periodic structure fabricated on Si substrate, where the incident-angle dependence including negative refraction and multiple beam branching was interpreted from highly anisotropic dispersion surfaces derived by photonic band calculation.
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Self-collimating phenomena in photonic crystals
Hideo Kosaka,T. Kawashima,Akihisa Tomita,Masaya Notomi,Masaya Notomi,Toshiaki Tamamura,Toshiaki Tamamura,Takashi Sato,Shojiro Kawakami +8 more
TL;DR: In this article, self-determining collimated light is generated in a photonic crystal fabricated on silicon and the divergence of the collimated beam is insensitive to that of the incident beam and much smaller than the divergence generated in conventional Gaussian optics.
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Square and Triangular Nanohole Array Architectures in Anodic Alumina
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Photonic crystals for micro lightwave circuits using wavelength-dependent angular beam steering
Hideo Kosaka,T. Kawashima,Akihisa Tomita,Masaya Notomi,Masaya Notomi,Toshiaki Tamamura,Toshiaki Tamamura,Takashi Sato,Shojiro Kawakami +8 more
TL;DR: In this article, a light-beam steering that is extremely wavelength dependent has been demonstrated by using photonic crystals fabricated on Si. The scanning span reached 50° with only a 1% shift of incident wavelength at around 1 μm.