Keiji Sasaki
Hokkaido University
270 Papers
2.1K Citations
Keiji Sasaki is an academic researcher from Hokkaido University. The author has contributed to research in topics: Laser & Plasmon. The author has an hindex of 42, co-authored 256 publications. Previous affiliations of Keiji Sasaki include Keio University & Shinshu University.
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Papers
Laser trapping, spectroscopy, and ablation of a single latex particle in water.
TL;DR: Simultaneous laser manipulation, spectroscopy, and ablation of a dye-doped poly(methyl methacrylate) latex particle in water was demonstrated in this paper, where a minute hole with its diameter and length of ≈sub μm and 4-7 μm, respectively, was fabricated on an optically trapped latex particle (4 − 7 μm diameter) by laser ablation.
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Efficiencies for the single-mode operation of a quantum optical nonlinear shift gate
TL;DR: In this paper, the single mode operation of a quantum optical nonlinear phase shift gate implemented by a single two-level atom in one-dimensional free space is investigated, and the authors obtain an optimal single mode transmittance per photon of 78% for the successful nonliner \pi phase shift operation.
Spatial Pattern Formation, Size Selection, and Directional Flow of Polymer Latex Particles by Laser Trapping Technique
TL;DR: In this article, polystyrene latex particles with the diameter of ≈ 1 μm in water were laser trapped in spatial images of a laser beam, and delicate tuning of t...
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Observation of the discrete transition of optically trapped particle position in the vicinity of an interface
TL;DR: In this paper, the authors observed discrete transitions in the position of a particle optically trapped in the vicinity of an interface using a nanometer position sensing system, attributed to interference effects due to reflection and scattering of the trapping laser beam from the interface and the particle.
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Nanopattern Fabrication of Gold on Hydrogels and Application to Tunable Photonic Crystal
Naonobu Shimamoto,Yoshito Tanaka,Hideyuki Mitomo,Ryuzo Kawamura,Kuniharu Ijiro,Keiji Sasaki,Yoshihito Osada +6 more
TL;DR: A polymer hydrogel consists of an elastic cross-linked polymer network with water in the interstitial spaces, giving hydrogels viscoelastic properties, which enables gel applications as stimuli-responsive soft, wet matter and enables dynamic control of the gel expansion and contraction.
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