Search Results 1-20 of 2863

  • TRPV1 and TRPA1 are cooperatively involved in the tooth movement-related pain.  [in Japanese]

    Adachi Kazunori , Yugawa Misato

    … In addition, the intraperitoneal administration of TRPV1 antagonist or the thermal stimulation (e.g., laser irradiation) to periodontium significantly inhibited orthodontic force-induced excitation of jaw-opening reflex and trigeminal ganglia. … however, trigeminal excitation was not inhibited. …

    Proceedings for Annual Meeting of The Japanese Pharmacological Society 94(0), 3-P1-04, 2021


  • Image Sensor with Hybirid Emission Filter for <i>in-vivo</i> Fluorescent Imaging  [in Japanese]

    Sasagawa Kiyotaka , Rustami Erus , Ohta Yasumi , Haruta Makito , Takehara Hironari , Tashiro Hiroyuki , Ohta Jun

    … A hybrid filter that combines an interference filter and an absorption filter enables a high excitation light removal performance in an implantable image sensor that does not use a lens. … In this study, a thin hybrid filter was successfully mounted on the image sensor using the transfer method by using a laser lift-off technique. … It was demonstrated that the prototype device exhibited high excitation light removal performance and was able to acquire a fluorescent image with high contrast.</p> …

    IEEJ Transactions on Sensors and Micromachines 141(3), 71-76, 2021


  • Remote Sensing of Plant Fluorescence Spectrum and Lifetime by Laser-induced Fluorescence Lidars

    SAITO Yasunori , OMASA Kenji

    … <p>We have developed two types of laser-induced fluorescence lidar, which are LIFS (laser-induced fluorescence spectrum) lidar and LIFL (laser-induced fluorescence lifetime) lidar. … The LIFS lidar consisted of a pulsed 355 nm laser for excitation of plant pigments, a spectrometer covered the entire range of plant fluorescence from 300 nm to 800 nm and a gated intensified CCD array for detection. …

    Journal of The Remote Sensing Society of Japan 41(Supplement), S1-S10, 2021


  • Effect of Plasma Gas and the Pressure on Spatially and Temporally Resolved Images of Copper Emission Lines in Laser Induced Plasma Optical Emission Spectrometry

    WENG Julian , KASHIWAKURA Shunsuke , WAGATSUMA Kazuaki

    … <p>This paper investigated two-dimensional spatial and temporal images of a copper emission line in laser-induced breakdown spectroscopy (LIBS), in order to clarify the excitation/de-excitation processes occurring in a laser-induced plasma. …

    Analytical Sciences 37(2), 367-375, 2021


  • Investigation of the Excitation Wavelength for Extension of Diagnostic Depth in 5-aminolevulinic Acid-based Photodynamic Diagnosis of Bladder Cancer  [in Japanese]

    Takishima Hiroki , Ihara Daisuke , Nishimura Takahiro , Hazama Hisanao , Awazu Kunio

    <p>膀胱癌に対するアミノレブリン酸光線力学診断(5-aminolevulinic acid-based photodynamic diagnosis: ALA-PDD)における診断深度の励起光波長の選択による拡張を検証した.膀胱組織中の光減衰とプロトポルフィリンIXの光吸収特性に基づく理論計算で,腫瘍の深さが0.9 mm以深では波長505 nmの緑色光励起で蛍光強度が最も高くなった. …

    Nippon Laser Igakkaishi 41(4), 297-306, 2021


  • Influence of Surface Condition of Concrete on Elastic Wave Excitation by Laser-Irradiation  [in Japanese]

    村瀬 春祐 , 橋本 勝文 , 塩谷 智基 , 河野 広隆 , 服部 篤史

    コンクリート構造物の補修,補強,アップグレード論文報告集 Proceedings of the Concrete Structure Scenarios, JSMS 20, 373-376, 2020-10

  • Spin selection in single-frequency two-photon excitation of alkali-metal atoms

    Krishnapriya Subramonian Rajasree , Ratnesh Kumar Gupta , Vandna Gokhroo , Fam Le Kien , Thomas Nieddu , Tridib Ray , Síle Nic Chormaic , Georgiy Tkachenko

    … We develop a theoretical framework for spin selection in single-frequency two-photon excitation of alkali-metal atoms as a function of polarization of the excitation light. … We verify the theory by experimentally probing the [Formula: see text] transition rate in ⁸⁷Rb in two configurations: paraxial light excitation of warm vapor and nonparaxial excitation of laser-cooled atoms. …

    Physical Review Research 2(3), 033341, 2020-08-31


  • Third-order nonlinear effects on femtosecond X-ray-absorption near-edge spectra

    Kitamura Hikaru

    … Reduced density matrix equations combined with a cluster molecular-orbital method are formulated to describe resonant core-valence electron excitation by an intense femtosecond x-ray pulse. … These trends are qualitatively consistent with nonlinear spectroscopy experiments using the SACLA x-ray free-electron laser. …

    Physical Review A 102(2), 2020-08


  • Role of virtual band population for high harmonic generation in solids

    Sanari Yasuyuki , Hirori Hideki , Aharen Tomoko , Tahara Hirokazu , Shinohara Yasushi , Ishikawa Kenichi L. , Otobe Tomohito , Xia Peiyu , Ishii Nobuhisa , Itatani Jiro , Sato Shunsuke A. , Kanemitsu Yoshihiko

    光と固体の量子力学的な相互作用による新たな光の発生機構を解明 --高次高調波光の発生機構の解明に向けた新たな知見--. 京都大学プレスリリース. 2020-07-30.

    Physical Review B 102(4), 2020-07-15


  • Low damage femto second laser processing using double pulse beam  [in Japanese]

    林 照剛 , 黒河 周平

    電気加工技術 44(136), 13-16, 2020-05-21

  • Two-photon selective excitation of phonon-mode in diamond using mid-infrared free-electron laser

    Sato Oji , Yoshida Kyohei , Zen Heishun , Hachiya Kan , Goto Takuya , Sagawa Takashi , Ohgaki Hideaki

    … Two-photon selective excitation of an infrared (IR)-inactive phonon mode by a mid-infrared tunable free-electron laser (FEL) was accomplished. … The mode-selective phonon excitation of IR-active mode by one-photon excitation using FEL (Yoshida et al. … (2013) [20]) was extended to the IR-inactive mode excitation. …

    Physics Letters A 384(10), 2020-04-09


  • Generation of cold Rydberg atoms at submicron distances from an optical nanofiber

    Krishnapriya Subramonian Rajasree , Tridib Ray , Kristoffer Karlsson , Jesse L. Everett , Síle Nic Chormaic

    … Using a two-photon ladder-type excitation in 87Rb, we demonstrate both coherent and incoherent Rydberg excitation at submicron distances from the nanofiber surface. … The 780-nm photon, near resonant to the 5S→5P transition, is mediated by the cooling laser, while the 482-nm light, near resonant to the 5P→29D transition, is mediated by the guided mode of the nanofiber. …

    Physical Review Research 2(1), 012038(R), 2020-02-14


  • Laser-induced plasma shock wave excitation technique with acoustic lens  [in Japanese]

    HOSOYA Naoki , YOSHIDA Yuki , MAEDA Shingo , KAJIWARA Itsuro , Ambroziński Łukasz , PIECZONKA Łukasz

    … <p>This paper proposes a methodology to adjust an excitation force amplitude generated by laser-induced plasma shock wave. … To realize a remote sensing technique, we investigate a non-contact method to vibrate target mechanical structures or infrastructures to be inspected using laser ablation or laser-induced plasma shock wave. …

    The Proceedings of the Dynamics & Design Conference 2020(0), 203, 2020


  • Fundamentals and Applications of Quantitative Measurement of Temperature using Laser Induced Thermal Grating Spectroscopy (LITGS)  [in Japanese]

    HAYAKAWA Akihiro , KONDO Hiromi

    … <p>Temperature is one of the important parameters for understanding the combustion phenomena, and various laser diagnostics for quantitative measurement of temperature have been developed. … However, there are physical factors which cause difficulties of laser diagnostics at high pressure conditions. …

    Journal of the Combustion Society of Japan 62(202), 325-332, 2020


  • Laser-induced exfoliation of epitaxial graphene layers on SiC(0001): Optical fabrication of monolayer graphene  [in Japanese]

    Horie Ryosuke , Ishida Kento , Kanasaki Jun'ichi , Kisoda Kenji , Takahashi Kazutoshi

    <p>SiC 基板上にエピタキシャル成長させたグラフェン原子層にフェムト秒レーザー光を照射し、グラフェン原子層の励起誘起構造変化をラマン散乱分光法により研究した。照射前後における2Dラマンピークの形状変化から、光励起により多層グラフェン領域が縮小し、反相関的に単層グラフェン領域が拡大していくことが判明した。講演では、励起強度を最適化することによるグラフェン単層膜創製の可能性について議論 …

    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science 2020(0), 276, 2020


  • Monitoring of Concrete Hardening by Laser Excitation and Measurement  [in Japanese]

    Sasaki Motoaki , Takemoto Yoshiaki , Saito Ryosuke , Kajiwara Itsuro

    Proceedings of the Japan Joint Automatic Control Conference 63(0), 1158-1161, 2020


  • Photoluminescence and structural similarity of crystals with oxide–fluoride stacking structure and oxyfluoride glass


    … The glass showed higher quantum yield (QY) than ceramic samples, i.e., the QY was 95 % for glass and 51 % for ceramics, by a 395 nm excitation. … The study results can contribute to the use of rare-earth ion-doped glasses in various applications such as laser and optical amplification, white light emitting diode (LED) lighting, and sensing technologies.</p> …

    Journal of the Ceramic Society of Japan 128(12), 1030-1037, 2020


  • Study on Internal Flow of Single Screw Pump with Narrow Gap:― Flow Visualization using Ultraviolet Excitation Fluorescent Particles ―  [in Japanese]

    長濱 正太 , 小田 靖久 , 堀江 昌朗

    … In this study, the internal flow was observed by the particle tracking methods which used ultraviolet excitation fluorescence particles and violet laser source. …

    The Proceedings of Conference of Kansai Branch 2020.95(0), 09_904, 2020


  • Laser Ultrasonic Technique to Non-Destructively Detect Cracks on a Ni-Based Self-Fluxing Alloy Fabricated Using Directed Energy Deposition (DED)

    Sato Harumichi , Ogiso Hisato , Yamashita Yorihiro , Funada Yoshinori

    … Here, we are developing a system that uses directed energy deposition (DED), which is a 3D-printing (additive manufacturing, AM) process, to fabricate thin jigs, and then uses laser ultrasonics (LU) to inspect the jigs. … However, using LU on such a small area has three problems: the effect of overlapping of the excitation and detection laser beams, difficulty in separating the multiple types of waves due to the simultaneous generation, and complexity of the acoustic field. …

    MATERIALS TRANSACTIONS 61(10), 1994-2001, 2020


  • Silver Nanoparticle–Phospholipid Self–Assembly Systems for Membrane Surface– Enhanced Raman Spectroscopy Analysis

    Miftah Faried , Suga Keishi , Okamoto Yukihiro , Umakoshi Hiroshi

    … Raman enhancements were observed, in measurements with excitation by green laser (532 nm) and by red laser (785 nm). …

    MEMBRANE 45(4), 187-192, 2020


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