Study on dynamic fluctuation by terahertz and FIR spectroscopy using metal parallel-plate waveguide

• Project/Area Number: 16K05649
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: University of Fukui
• Principal Investigator: Yamamoto Kohji 福井大学, 遠赤外領域開発研究センター, 准教授 (70432507)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2018: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2017: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
• Keywords: テラヘルツ分光 / 遠赤外分光 / 金属導波路 / テラヘルツ / 遠赤外 / テラヘルツ/赤外材料・素子 / 化学物理 / 誘電体物性 / 生物物理 / 応用光学・量子光工学

Outline of Final Research Achievements

We investigated transmission properties of terahertz waves through a metal parallel-plate waveguide sandwiching a plastic tube. We have taken a forward step in developing terahertz spectroscopy using a minute fluid channel. We showed that loss attenuation peaks observed in this system can be applied in terahertz spectroscopy from terahertz spectroscopic experimental results as well as those obtained by computer simulations based on the finite element method.
We experimentally investigated dynamical fluctuations of human adult hemoglobin (Hb A) originating cotroling oxygen affinity. We obtained fluctuation properties of the main chain of Hb A in high and low oxygen affinity.

Academic Significance and Societal Importance of the Research Achievements

金属導波路を用いて微量液体流路をカップルさせた金属導波路の開発を進めることができ、タンパク質の「機能発現」と「テラヘルツ領域の揺らぎ」との相関に関する新たな知見を得ることに成功し、テラヘルツ分光が動的揺らぎの研究の進展に寄与することを示した。

Research Products

• [Journal Article] Study on irradiation effect of mid-infrared free electron laser on hen egg-white lysozyme by using terahertz-time domain spectroscopy and synchrotron radiation vacuum-ultraviolet circular-dichroism spectroscopy (2019)
  • Author(s): T. Kawasaki, Y. Izumi, G. Ohori, H. Kitahara, T. Furuya, K. Yamamoto, K. Matsuo, M. Tani, K. Tsukiyama
  • Journal Title: Journal of Infrared, Millimeter, and Terahertz Waves Volume: 40 Issue: 10 Pages: 998-1009
  • DOI: 10.1007/s10762-019-00626-9
  • Peer Reviewed
• [Journal Article] Metal-Coated <100>-Cut GaAs Coupled to Tapered Parallel-Plate Waveguide for Cherenkov-Phase-Matched Terahertz Detection: Influence of Crystal Thickness (2018)
  • Author(s): delos Santos Ramon、Mag-usara Valynn、Tuico Anthony、Copa Vernalyn、Salvador Arnel、Yamamoto Kohji、Somintac Armando、Kurihara Kazuyoshi、Kitahara Hideaki、Tani Masahiko、Estacio Elmer
  • Journal Title: Journal of Infrared, Millimeter, and Terahertz Waves Volume: 39 Issue: 6 Pages: 514-520
  • DOI: 10.1007/s10762-018-0487-1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Terahertz emission characteristics of GaMnAs dilute magnetic semiconductor under 650 mT external magnetic field (2017)
  • Author(s): Alexander De Los Reyes, Elizabeth Ann Prieto, Karim Omambac, Jeremy Porquez, Lorenzo Lopez Jr., Karl Cedric Gonzales, John Daniel Vasquez, Mae Agatha Tumanguil, Joselito Muldera, Kohji Yamamoto, Masahiko Tani, Armando Somintac, Elmer Estacio, and Arnel Salvador
  • Journal Title: Curr. Appl. Phys. Volume: 17 Issue: 4 Pages: 522-526
  • DOI: 10.1016/j.cap.2017.01.021
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Heterogeneity between Two α Subunits of α2β2 Human Hemoglobin and O2 Binding Properties: Raman, 1H Nuclear Magnetic Resonance, and Terahertz Spectra (2017)
  • Author(s): Shigenori Nagatomo, Kazuya Saito, Kohji Yamamoto, Takashi Ogura, Teizo Kitagawa, and Masako Nagai
  • Journal Title: Biochemistry Volume: 56 Issue: 46 Pages: 6125-6136
  • DOI: 10.1021/acs.biochem.7b00733
  • Peer Reviewed
• [Journal Article] テラヘルツ時間領域分光で迫る物質の性質 (2017)
  • Author(s): 山本晃司
  • Journal Title: 照明学会誌 Volume: 101 Pages: 500-503
  • Peer Reviewed
• [Journal Article] Defect-related temperature dependence of THz emission from GaAs/AlGaAs MQWs grown on off- and on-axis substrates (2017)
  • Author(s): Jessica P. C. Afalla1, Alexander de los Reyes, Valynn Katrine Mag-usara, Lorenzo P. Lopez Jr., Kohji Yamamoto, Masahiko Tani, Armando S. Somintac, Arnel A. Salvador, and Elmer S. Estacio
  • Journal Title: AIP Advances Volume: 7 Issue: 12 Pages: 125210-125210
  • DOI: 10.1063/1.5004597
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] External magnetic field distribution mapping using terahertz emission from indium antimonide (2017)
  • Author(s): Valynn Katrine Mag-usara, Dmitry S. Bulgarevich, Mitsuharu Shiwa, Makoto Watanabe, Masahiko Tani
  • Journal Title: Japanese Journal of Applied Physics Volume: 56 Issue: 2 Pages: 028001-028001
  • DOI: 10.7567/jjap.56.028001
  • Peer Reviewed
• [Journal Article] Aperture transmission measurements for characterization of focusing of sub-THz radiation (2016)
  • Author(s): .Osamu Morikawa, Kohji Yamamoto, Kazuyoshi Kurihara, Masahiko Tani, Fumiyoshi Kuwashima, and Masanori Hangyo
  • Journal Title: Journal of the Optical Society of America B Volume: 33 Issue: 7 Pages: 1456-1461
  • DOI: 10.1364/josab.33.001456
  • Peer Reviewed
• [Journal Article] Sub-terahertz imaging using a low-cost system with photoconductive spiral antennas and a multimode laser diode (2016)
  • Author(s): Osamu Morikawa, Kohji Yamamoto, Kazuyoshi Kurihara, Masahiko Tani, Fumiyoshi Kuwashima, and Masanori Hangyo
  • Journal Title: Journal of the Optical Society of America B Volume: 33 Pages: 1940-1948
  • Peer Reviewed
• [Journal Article] Cherenkov-phase-matched nonlinear optical detection and generation of terahertz radiation via GaAs with metal-coating (2016)
  • Author(s): Ramon delos Santos, Shinpei Ozawa, Valynn Mag-usara, Syougo Azuma, Anthony Tuico, Vernalyn Copa, Arnel Salvador, Kohji Yamamoto, Armando Somintac, Kazuyoshi Kurihara, Hideaki Kitahara, Masahiko Tani and Elmer Estacio
  • Journal Title: Optics Express Volume: 24 Issue: 22 Pages: 24980-24988
  • DOI: 10.1364/oe.24.024980
  • Peer Reviewed
• [Journal Article] Low temperature-grown GaAs carrier lifetime evaluation by double optical pump terahertz time-domain emission spectroscopy (2016)
  • Author(s): Valynn Katrine Mag-usara, Stefan Funkner, Gudrun Niehues, Elizabeth Ann Prieto, Maria Herminia Balgos, Armando Somintac, Elmer Estacio, Arnel Salvador, Kohji Yamamoto, Muneaki Hase, Tani, Masahiko
  • Journal Title: Optics Express Volume: 24 Issue: 23 Pages: 26175-26185
  • DOI: 10.1364/oe.24.026175
  • Peer Reviewed
• [Presentation] Transmittance of terahertz wave through a metal parallel plate waveguide coupled with a metal taper investigated by FDTD simulation (2019)
  • Author(s): 103.Kohshi Inomata, Kohji Yamamoto, Kazutoshi Fukui, and Masahiko Tani
  • Organizer: The 7th International Workshop on Far-Infrared Technologies 2019 (IW-FIRT 2019)
  • Int'l Joint Research
• [Presentation] Sensitivity Improvement of Heterodyne Electro-Optic Sampling (2018)
  • Author(s): Hideaki Kitahara, Takuro Yasumoto, Daiki Goto, Hiroyuki Kato, Masaki Shiihara, Jessica Afalla, Valynn Mag-usara, Kohji Yamamoto, Takashi Furuya, Elmer Estacio, Michael Bakunov, and Masahiko Tani
  • Organizer: 2018 43rd International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2018)
  • Int'l Joint Research
• [Presentation] Enhancement Of Electric Field In E-plane Sectoral Horn Antennas Reconsidered By Plasmonic Theory (2018)
  • Author(s): Kazuyoshi Kurihara, Kiwamu Kusama, Fumfiyoshi Kuwashima, Osamu Morikawa, Kohji Yamamoto, Hideaki Kitahara, Masahiko Tani
  • Organizer: 2018 43rd International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2018)
  • Int'l Joint Research
• [Presentation] FDTD法による金属テーパー構造導波路のテラヘルツ帯透過解析 (2017)
  • Author(s): 田畑 寛明, 北原 英明, 山本 晃司, 福井 一俊, 栗原 一嘉, 森川 治, 桑島 史欣,谷 正彦
  • Organizer: 第78回応用物理学会 秋季学術講演会
• [Presentation] ヘモグロビンの酸素親和性制御に関係する大振幅ヘリックス揺らぎの実験的検証：テラヘルツ（THz）分光による研究 (2017)
  • Author(s): 長友 重紀, 山本 晃司, 長井 雅子, 北川 禎三
  • Organizer: 日本生物物理学会第55回年会
• [Presentation] Application of a metal parallel-plate waveguide to terahertz spectroscopy (2017)
  • Author(s): Kohji Yamamoto, Hiroaki Tahata, Itsuki Kurata, Kazuyoshi Kurihara, Fumiyoshi Kuwashima, Osamu Morikawa, Ohki Kambara, Kazutoshi Fukui, and Masahiko Tani
  • Organizer: Molecular Photoscience Research Center International Symposium
  • Place of Presentation: Takigawa Memorial Hall （Kobe University, Kobe)
  • Invited
• [Presentation] 金属平行平板を用いたテラヘルツ分光とその定量解析 (2016)
  • Author(s): 山本晃司、田畑 寛明、倉田 樹、福井 一俊、神原 大、栗原 一嘉、森川 治、桑島史欣、谷正彦
  • Organizer: 分子科学討論会2016
  • Place of Presentation: 神戸ファッションマート（兵庫県・神戸）
  • Year and Date: 2016-09-13