M
Motoki Imamura
Researcher at Advantest
Publications - 33
Citations - 343
Motoki Imamura is an academic researcher from Advantest. The author has contributed to research in topics: Terahertz radiation & Terahertz spectroscopy and technology. The author has an hindex of 8, co-authored 33 publications receiving 295 citations.
Papers
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Journal ArticleDOI
Characterization of Dielectric Responses of Human Cancer Cells in the Terahertz Region
Keiichiro Shiraga,Yuichi Ogawa,Tetsuhito Suzuki,Naoshi Kondo,Akiyoshi Irisawa,Motoki Imamura +5 more
TL;DR: It is demonstrated that dielectric responses below 1.0 THz best characterize the particular water dynamics of cancer cells when compared with extracellular water, and could lead to a new procedure to digitally evaluate cellular activities or functions, in terms of intracellular water dynamics, and remove the veil from the mysterious intrACEllular milieu.
Journal ArticleDOI
Evaluation of the hydration state of saccharides using terahertz time-domain attenuated total reflection spectroscopy.
TL;DR: THz time-domain attenuated total reflection (THz TD-ATR) spectroscopy allowed to determine the complex refractive index of saccharide solutions and to experimentally characterize the global hydration state, indicating the global Hydration state is closely related to the number of hydrophilic groups and steric configuration of hydroxyl groups in saccharid molecules.
Patent
Optical characteristic measuring apparatus, the method thereof and recording medium
TL;DR: In this paper, the identification waveform detector detects when the waveform starts to change, and it is possible to obtain synchronization between an incidence side and an exit side of the optical fiber.
Journal ArticleDOI
Determination of the complex dielectric constant of an epithelial cell monolayer in the terahertz region
Keiichiro Shiraga,Yuichi Ogawa,Tetsuhito Suzuki,Naoshi Kondo,Akiyoshi Irisawa,Motoki Imamura +5 more
TL;DR: In this paper, the complex dielectric constant of a cell monolayer using terahertz time-domain attenuated total reflection spectroscopy combined with a two-interface model was determined.
Journal ArticleDOI
Pore-size dependent THz absorption of nano-confined water.
Chi-Kuang Sun,Borwen You,Yu-Ru Huang,Kao-Hsiang Liu,Shusaku Sato,Akiyoshi Irisawa,Motoki Imamura,Chung-Yuan Mou +7 more
TL;DR: Spectroscopy analysis of liquid water confined in mesoporous silica materials of two different pore sizes at room temperatures finds that stronger confinement with a smaller pore size causes reduced THz absorption, indicating reduced water mobility due to confinement.