Search Results - "Kaji, Ryosaku"

A flexible proximity sensor formed by duplex screen/screen-offset printing and its application to non-contact detection of human breathing by Nomura, Ken-ichi, Kaji, Ryosaku, Iwata, Shiro, Otao, Shinobu, Imawaka, Naoto, Yoshino, Katsumi, Mitsui, Ryosuke, Sato, Junya, Takahashi, Seiya, Nakajima, Shin-ichiro, Ushijima, Hirobumi

“…We describe a flexible capacitance-type sensor that can detect an approaching human without contact, fabricated by developing and applying duplex…”
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Characterization of non-contact measurements of electrolyte concentrations using a printed mutual-capacitive sensor film by Iwata, Shiro, Imawaka, Naoto, Yoshino, Katsumi, Nomura, Ken-ichi, Horii, Yoshinori, Kaji, Ryosaku, Ushijima, Hirobumi

“…We have characterized a non-contact measurement system to concentrations of electrolytic solutions using a sensor film that is pasted on the outer surface of…”
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Gated-mode single-photon detection at 1550 nm by discharge pulse counting by Yoshizawa, Akio, Kaji, Ryosaku, Tsuchida, Hidemi

“…Gated-mode single-photon detection using an avalanche photodiode is characterized by charge and discharge pulses, which are attributable to capacitive…”
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A New DC Electric Field Sensor and Direct Measurements of Ionosphere Sq Electric Fields by Tsutsui, Minoru, Kaji, Ryosaku

“…A new type of DC electric field sensor has been developed. It is not mill type electric field sensor whose principle is to measure electric potentials in the…”
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10.5 km Fiber-Optic Quantum Key Distribution at 1550 nm with a Key Rate of 45 kHz by Yoshizawa, Akio, Kaji, Ryosaku, Tsuchida, Hidemi

“…High-speed single-photon detectors are crucial for efficiently performing quantum key distribution. We demonstrate fiber-optic quantum key distribution at 1550…”
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A Method of Discarding After-Pulses in Single-Photon Detection for Quantum Key Distribution by Yoshizawa, Akio, Kaji, Ryosaku, Tsuchida, Hidemi

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Two-photon Interference at 1550 nm Using Two Periodically Poled Lithium Niobate Waveguides by Yoshizawa, Akio, Kaji, Ryosaku, Tsuchida, Hidemi

“…Authors observed two-photon interference at 1550 nm using two periodically poled LiNbO3 waveguides. Two In-GaAs gated-mode single-photon detectors were used…”
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Two-coherent-state quantum key distribution using a large reference pulse for security enhancement by YOSHIZAWA, Akio, KAJI, Ryosaku, TSUCHIDA, Hidemi

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Quantum interference phenomena in an electron-wave directional coupler with finite coupling length by KAJI, R, KOSHIBA, M

“…A new type of quantum field effect directional coupler with finite coupling length is studied with the equivalent network approach. The coupler analyzed is…”
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Evaluation of keyrates in unconditionally secure quantum key distribution taking account of the afterpulse effect of single-photon detectors by Kaji, Ryosaku, Yoshizawa, Akio, Tsuchida, Hidemi

“…In order to clarify how the generation of afterpulses in single‐photon detectors based on InGaAs avalanche photodiodes affects quantum key distribution based…”
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Continuous Output Beam Steering in Vertical-Cavity Surface-Emitting Lasers with Two p-Type Electrodes by Controlling Injection Current Profile by Ide, Toshihide, Shimizu, Mitsuaki, Mukai, Seiji, Ogura, Mutsuo, Kikuchi, Takuya, Suzuki, Yoshihiro, Kaji, Ryosaku, Itoh, Hideo, Watanabe, Masanobu, Yajima, Hiroyoshi, Nemoto, Toshio

“…Using vertical-cavity surface-emitting lasers with two p-type electrodes, continuous output beam steering was achieved for the first time by controlling the…”
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Combination of beam propagation method and mode expansion propagation method for bidirectional optical beam propagation analysis by Hayashi, K., Koshiba, M., Tsuji, Y., Yoneta, S., Kaji, R.

“…A combined method of the beam propagation method (BPM) and the mode expansion propagation method (MEPM) is proposed for the analysis of reflections of both…”
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Equivalent network approach for multistep discontinuities in electron waveguides by Kaji, R., Koshiba, M.

“…An analysis method is described for multistep discontinuities in electron waveguides composed of semiconductor heterostructures. The method is based on a…”
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A comprehensive analysis of multilayer channel waveguides by Osman, N., Koshiba, M., Kaji, R.

“…Using a simple approach based on the scalar finite element method, propagation characteristics of multilayer channel waveguides are calculated. The effective…”
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Equivalent network approach for guided electron waves obliquely incident on step discontinuities in planar heterostructures by Kaji, R., Koshiba, M.

“…An equivalent network approach is developed for the analysis of the guided electron wave obliquely incident on step discontinuities in planar heterostructures…”
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Finite element solution of electron waveguide discontinuities and its application to quantum field effect directional couplers by Gotoh, H., Koshiba, M., Kaji, R.

“…A numerical approach based on the finite element method is described for the solution of electron waveguide discontinuities with arbitrary potential and…”
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A complete set of normal modes in three-layered electron waveguides by Kaji, R., Koshiba, M.

“…Mathematical expressions are given for guided and radiation modes including nonpropagating parts in three-layered electron waveguides, in addition to gaining a…”
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Equivalent network approach for guided electron waves in quantum-well structures and its application to electron-wave directional couplers by Kaji, R., Koshiba, M.

“…By utilizing an analogy in electromagnetic wave propagation, an equivalent network procedure is described for guided electron waves in quantum-well structures…”
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