Papers - Taguchi, Yoshihiro

Development of Near-Field Infrared Thermometry

Miura H., Taguchi Y.

International Conference on Optical MEMS and Nanophotonics (International Conference on Optical MEMS and Nanophotonics)  2018-July 2018.09

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© 2018 IEEE. Nanoscale thermometry is important for the thermal design of micro and nanodevices. In the measurement, a non-contact, non-destructive method is effective. Our method provides a nanoscale infrared thermometry with a tapered highly efficient near-field fiber probe.

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Development of Electrothermal Fresnel Mirror for Use in Micro Optical Diffusion Sensing Platform

Nakagawa T., Taguchi Y., Nagasaka Y.

International Conference on Optical MEMS and Nanophotonics (International Conference on Optical MEMS and Nanophotonics)  2018-July 2018.09

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© 2018 IEEE. A novel micro optical diffusion sensor enabling a high-speed and a small sample volume measurement has been developed. The proposed electrothermal actuators can achieve a miniaturization of the optical diffusion sensor. In this paper, a design of MEMS mirror with a long working distance is reported, and the validity of the mirror is discussed.

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Design of an optofluidic diffusion sensor by transient grating using dielectrophoresis

Kamata M., Taguchi Y., Nagasaka Y.

Optics Express (Optics Express)  26 ( 13 ) 16970 - 16983 2018.06

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© 2018 Optical Society of America. An optofluidic diffusion sensor using laser-induced dielectrophoresis in a device with a sputtered a-Si:H layer is presented. Diffusion sensors enabling high-speed measurement have important potential uses as bio-sensors and for quantitative analysis of nano-sized products. The present sensor was developed for measurement in a few seconds by optic observations of the sample diffusion from transient grating formed by laser-induced dielectrophoresis. As a photoconductive layer for the proposed device, we used a sputtered a-Si:H film. The optical (refractive index and extinction coefficient), structural (Raman and IR spectroscopy), and optoelectronic properties of this film, as well as its applicability to the proposed device are characterized. Nano-sized beads were measured by the fabricated device, and its performance as a diffusion sensor was validated.

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簡易・迅速なin situ測定を実現する光学式ハンドヘルド粘性センサの開発

TAGUCHI Yoshihiro

日本機械学会論文集 84 ( 360 ) 17-00572/1 - 17-00572/13 2018

Research paper (scientific journal), Joint Work, Accepted

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Motion Tracking System for Robust Non-Contact Blood Perfusion Sensor

Hashimoto, M., and Taguchi, Y.,

Sensors (Sensors (Switzerland))  18 ( 277 )  2018

Research paper (scientific journal), Joint Work, Accepted

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© 2018 by the authors. Licensee MDPI, Basel, Switzerland. We propose a motion-robust laser Doppler flowmetry (LDF) system that can be used as a non-contact blood perfusion sensor for medical diagnosis. Endoscopic LDF systems are typically limited in their usefulness in clinical contexts by the need for the natural organs to be immobilized, as serious motion artifacts due to the axial surface displacement can interfere with blood perfusion measurements. In our system, the focusing lens moves to track the motion of the target using a low-frequency reference signal in the optical data, enabling the suppression of these motion artifacts in the axial direction. This paper reports feasibility tests on a prototype of this system using a microfluidic phantom as a measurement target moving in the direction of the optical axis. The frequency spectra detected and the perfusion values calculated from those spectra show that the motion tracking system is capable of suppressing motion artifacts in perfusion readings. We compared the prototype LDF system’s measurements with and without motion feedback, and found that motion tracking improves the fidelity of the perfusion signal by as much as 87%.

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Motion-robust blood perfusion sensing by LDF with focus control

Masaaki H., Yoshihiro T.

International Heat Transfer Conference (International Heat Transfer Conference)  2018-August   585 - 590 2018

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© 2018 International Heat Transfer Conference. All rights reserved. For endoscopic Laser Doppler flowmetry (LDF), motion artifacts present a serious challenge for clinical applications. We propose a motion-robust LDF method that eliminates motion artifacts by controlling the lens positon with a feedback signal representing tissue motion. This method could be applied to an endoscopic device with micro-electro-mechanical-systems (MEMS) technology. To demonstrate the feasibility of the proposed method, a bench-top apparatus was constructed, and a blood flow phantom was used as the measurement target. Experimental tests shows that the controlled lens was moved to the target position under phantom movement, and the detected perfusion signal were stabilized by the focus control.

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Nanoscale Optical Thermometry using a Time-correlated Single-photon Counting in an Illumination-collection mode

Seto, D., Nikka, R., Nishio, S., Taguchi, Y., Saiki, T. and Nagasaka, Y.,

Applied Physics Letters 110 ( 3 ) 033109 - 1-4 2017.01

Research paper (scientific journal), Joint Work, Accepted

Decay Time Control of Mass Diffusion in a Transient Grating using a Fringe-tunable Electrothermal Fresnel Mirror

Kiuchi, Y., Taguchi, Y., and Nagasaka, Y.,

Journal of Thermal Science and Technology 12 ( 2 ) 17-00301/1 - 17-00301/11 2017

Research paper (scientific journal), Joint Work, Accepted

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Fringe-tunable electrothermal Fresnel mirror for use in compact and high-speed diffusion sensor

Kiuchi, Y., Taguchi, Y., and Nagasaka, Y.,

Optics Express 25 ( 2 ) 758 - 767 2017

Research paper (scientific journal), Single Work, Accepted

Measurement of Out-of-plane Thermal Conductivity of Epitaxial YBa2Cu3O7- Thin Films in the Temperature Range from 10 K to 300 K by Photothermal Reflectance

Murakami, Y., Goto, H., Taguchi, Y., and Nagasaka, Y.,

International Journal of Thermophysics  2017

Research paper (scientific journal), Joint Work, Accepted

スパッタ成膜a-Si:Hを用いたレーザー誘起誘電泳動による光MEMS拡散センサーの開発

TAGUCHI Yoshihiro

熱物性 30 ( 2 ) 74 - 79 2016

Research paper (scientific journal), Accepted

Optical Observation of DNA Translocation through Al2O3 Sputtered Silicon Nanopores in Porous Membrane

Yamazaki, H., Ito, S., Esashika, K., Taguchi, Y., and Saiki, T.,

Applied Physics A 122 ( 3 ) 216 - 1-6 2016

Research paper (scientific journal), Joint Work, Accepted

Micro optical diffusion sensor using a comb-driven micro Fresnel mirror

Matoba, Y., Taguchi, Y., and Nagasaka, Y.

Opt. Express (Opt. Express)  23 ( 1 ) 477 - 483 2015.01

Research paper (scientific journal), Joint Work, Accepted

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走査型プローブ顕微鏡を用いたナノスケール温度・熱物性計測技術

TAGUCHI Yoshihiro

計測と制御 54 ( 5 ) 321 - 326 2015

Research paper (scientific journal), Single Work, Accepted

スパッタ成膜a-Si:Hを用いたレーザー誘起誘電泳動による光MEMS拡散センサーの開発

TAGUCHI Yoshihiro

熱物性  2015

Research paper (scientific journal), Joint Work, Accepted

Thermal conductivity of semiclathrate hydrates and their solutions of tetra-n-butylammonium bromide (TBAB) and tetra-n-butylammonium chloride (TBAC) by the transient hot-wire using parylene-coated probe

Fujiura, K., Nakamoto, Y., Taguchi, Y., Ohmura, R., and Nagasaka, Y.

Fluid Phase Equilibria 413   129 - 136 2015

Research paper (scientific journal), Joint Work, Accepted

オーガナイズドセッション　MEMS技術を用いた熱物性デバイス

TAGUCHI Yoshihiro

熱物性 29 ( 1 ) 51 2015

Research paper (scientific journal), Joint Work, Accepted

Numerical analysis of the temperature dependence of near-field polarization for nanoscale thermometry using a triple-tapered near-field optical fiber probe

Nitta, J., Taguchi, Y., Saiki, T., and Nagasaka, Y.

J. Opt. (J. Opt.)  16   035001/1 - 7 2014.02

Research paper (scientific journal), Joint Work, Accepted

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Report on 7th U.S.-Japan Joint Seminar on Nanoscale Transport Phenomena - Science and Engineering-

Cola, B., Daiguji, H., Dames, C., Fang, N., Fushinobu, K., Inoue, S., Kikugawa, G., Kohono, M., Kumar, S., Li, D.Y., Malen, J.A., McGaughey, A., Nakabeppu, O., Pipe, K., Shen, S., Shi, L., Shibahara, M., Taguchi, Y., Takahashi, K., Yamamoto, T., Zolotoukhina, T.

Nanoscale and Microscale Thermophysical Engineering    25-49 2013.04

Research paper (conference, symposium, etc.), Joint Work, Accepted

FDTD法を用いた近接場フォトサーマル効果のナノスケール温度分布解析

福山祥平, 田口良広

日本機械学会論文集（B編） 79 ( 806 ) 2254-2263 2013

Research paper (scientific journal), Joint Work, Accepted