YAMAMOTO Kohji

FacultyApplication terahertz technology to research for material science and sensing
Teacher OrganizationApplication terahertz technology to research for material science and sensing
Education and
 Research Organization
Research Center for Development of Far-Infrared Rigion
PositionAssociate Professor
Last Updated: 19/07/23 20:23

Researcher Profile & Settings

Name

    YAMAMOTO Kohji

Affiliation

  •  Application terahertz technology to research for material science and sensing Associate Professor

Education

  • Apr. 1996Mar. 2000The Graduate University for Advanced Studies 機能分子科学
  • Apr. 1994Mar. 1996Kyoto University 化学専攻

Research Activities

Published Papers

  • Aperture transmission measurements for characterization of focusing of subterahertz radiation
    Osamu Morikawa, Kohji Yamamoto, Kazuyoshi Kurihara, Masahiko Tani, Fumiyoshi Kuwashima, and Masanori Hangyo
    J. Opt. Soc. Am. B 33(7) 1456-1461 Jun.  2016 Refereed
  • Sub-terahertz imaging using time-domain signals obtained with photoconductive spiral antennas
    Osamu Morikawa, Kohji Yamamoto, Kazuyoshi Kurihara, Masahiko Tani, Fumiyoshi Kuwashima, and Masanori Hangyo
    J. Opt. Soc. Am. B 33(9) 1940-1948 Jun.  2016 Refereed
  • Low temperature-grown GaAs carrier lifetime evaluation by double optical pump terahertz time-domain emission spectroscopy
    Valynn Katrine Mag-usara, Stefan Funkner, Gudrun Niehues, Elizabeth Ann Prieto, Maria Herminia Balgos, Armando Somintac, Elmer Estacio, Arnel Salvador, Kohji Yamamoto, Muneaki Hase, and Masahiko Tani
    Opt. Express 24(23) 26175-26185 Nov.  2016 Refereed
  • Spectral Characteristics of Photoconductive Dipole Antennas Including Photocurrent and ReceivingAntenna Effects
    Katsunari Irie, Keisuke Takano, John C. Young, Kohji Yamamoto, Masahiko Tani, Takehito Suzuki
     1 20-24 Jan.  2015 Refereed
  • Terahertz surface emission from Cu2ZnSnSe4 thin film photovoltaic material excited by femtosecond laser pulses
    Zhenyu Zhao, Gudrun Niehues, Stefan Funkner, Elmer Estacio, Qifeng Han, Kohji Yamamoto, Jingtao Zhang, Wangzhou Shi, Qixin Guo, Masahiko Tani
     105 231104-(4) Dec.  2014 Refereed
  • レーザーカオスと金属V溝を用いたTHz時間領域分光法
    桒島史欣, 白尾拓也, 岸端俊宏, 奥山豪, 赤峰勇佑, 谷 正彦, 栗原一嘉, 山本晃司, 長島健, 萩行正憲
     1-6 Sep.  2014 Not refereed
  • Tin Oxide-Silver Composite Nanomaterial Coating for UV Protection and Its Bactericidal Effect on Escherichia coli (E. coli)
    Gil Nonato C. Santos, Eduardo B. Tibayan, Gwen B. Castillon, Elmer Estacio, Takashi Furuya, Atsushi Iwamae, Kohji Yamamoto, Masahiko Tani
    Coatings 4 320-328 May  2014 Refereed
  • Terahertz emission enhancement in low-temperature-grown GaAs with an n-GaAs buffer in reflection and transmission excitation geometries
    Elizabeth Ann P. Prieto, Sheryl Ann B. Vizcara, Sheryl Ann B. Vizcara, Arnel A. Salvador, Elmer S. Estacio, Christopher T. Que, Kohji Yamamoto, Masahiko Tani
     31(2) 291-295 Feb.  2014 Refereed
  • Highly sensitive electro-optic sampling of terahertz waves using field enhancement in a tapered waveguide structure
    Satoshi Tsuzuki, Daiki Takeshima, Tomoya Sakon, Tetsuya Kinoshita, Tomohiro Nagase, Kazuyoshi Kurihara, Kohji Yamamoto, Fumiyoshi Kuwashima, Takashi Furuya, Elmer Estacio, Kodo Kawase, Michael I. Bakunov, Masahiko Tani
     7 112401-(3) Oct.  2014 Refereed
  • Utilization of chirped laser pulses to measure stimulated Raman scattering of organic liquids in the terahertz regime
    Stefan Funkner, Katsuya Saito, Gudrun Niehues, Yoshiki Yazawa, Takashi Furuya, Kohji Yamamoto, Masahiko Tani
    Applied Physics Letters 105(2) 21103-(4) Jul.  2014 Refereed
  • Non-Destructive Evaluation Method of Pharmaceutical Tablet by Terahertz-Time-Domain Spectroscopy: Application to Sound-Alike Medicines
    Masaya Kawase, Kohji Yamamoto, Keita Takagi, Ryohei Yasuda, Masafumi Ogawa, Yasutoshi Hatsuda, Sonoyo Kawanishi, Yoshihiko Hirotani, Michiaki Myotoku, Yoko Urashima, Katsuhito Nagai, Kenji Ikeda, Hiroki Konishi, Junji Yamakawa, Masahiko Tani
    J. Infrared, Millimeter and Terahertz Waves 34 566-571 Aug.  2013 Refereed
  • Non-ellipsometric detection of terahertz radiation using heterodyne EO sampling in the Cherenkov velocity matching scheme
    Masahiko Tani, Tetsuya Kinoshita, Tomohiro Nagase, Kazuki Horita, Christopher T. Que, Elmer Estacio, Kohji Yamamoto, Michael I. Bakunov
    Optics Express 21(7) 9277-9288 Apr.  2013 Refereed
  • Fast-Scan Terahertz Time Domain Spectrometer Based on Laser Repetition Frequency Modulation
    Takashi Furuya, Elmer S. Estacio, Kazuki Horita, Christopher T. Que, Kohji Yamamoto, Fumiaki Miyamaru, Seiji Nishizawa, Masahiko Tani
    The Japanese Journal of Applied Physics 52 022401 (5 pages) Feb.  2013 Refereed
  • Lens Coupler and Magnetic Field Terahertz Emission Enhancement in InSb and InAs under 1.55-um Excitation
    Hidekazu Nakajima, Christopher T. Que, Elmer Estacio, Kohji Yamamoto, Masahiko Tani
    The Japanese Journal of Applied Physics 52 032201 (3 pages) Feb.  2013 Refereed
  • Terahertz emission from GaAs-AlGaAs core-shell nanowires on Si (100) substrate: effects of applied magnetic field and excitation wavelength
    Jasher John Ibanes, Ma. Herminia Balgos, Rafael Jaculbia, Arnel Salvador, Armando Somintac, Elmer Estacio, Christopher T. Que, Satoshi Tsuzuki, Kohji Yamamoto, Masahiko Tani
    Appl. Phys. Lett. 102(6) 063101 (3 pages) Feb.  2013 Refereed
  • Intense terahertz emission from MBE-grown GaAs/GaSb(001)
    Cyril Sadia, Aleena Maria Laganapan, Mae Agatha Tumanguil, Elmer Estacio, Armando Somintac, Arnel Salvador, Christopher Que, Kohji Yamamoto, Masahiko Tani
    J. Appl. Phys. 112(12) 123514 (5 pages) Dec.  2012 Refereed
  • Detection of Terahertz Pulsed Radiation by Using Heterodyne Electro-Optic Sampling Scheme
    Masahiko Tani, Michael Bakunov, Kohji Yamamoto, Kazuki Horita, Tetsuya Kinoshita, Tomohiro Nagase
    IEEJ Transactions on Fundamentals and Material 132(9) 727-733 Sep.  2012 Refereed
  • Photoconductive Emission and Detection of Terahertz Pulsed Radiation Using Semiconductors and Semiconductor Devices
    Masahiko Tani, Kohji Yamamoto, Elmer S. Estacio, Christopher T. Que, Hidekazu Nakajima, Masakazu Hibi, Fumiaki Miyamaru, Seizi Nishizawa, Masanori Hangyo
    Journal of Infrared, Millimeter, and Terahertz Waves 33(4) 393-404 Apr.  2012 Refereed
  • Terahertz emission from Indium Oxide films grown on MgO substrates using sub-bandgap photon energy excitation
    Elmer S. Estacio, Christopher T. Que, Fritz C.B. Awitan, Jan Issac Bugante, Francesca Isabel de Vera, Jonathan Azares, Jessica Afalla, Jeffrey de Vero, Armando S. Somintac, Roland V. Sarmago, Arnel A. Salvador, Kohji Yamamoto, Masahiko Tani
    Optics Express 20(4) 4518-4524 Feb.  2012 Refereed
  • Low-Frequency Coherent Raman Spectroscopy Using Spectral-Focusing of Chirped Laser Pulses
    Masahiko Tani, Masakazu Hibi, Kohji Yamamoto, Mariko Yamaguchi, Elmer S. Estacio, Christopher T. Que, Masanori Hangyo
    Vibrational Spectroscopy Chapter 7 153-168 Feb.  2012 Refereed
  • Efficient electro-optic sampling detection of terahertz radiation via Cherenkov phase Matching
    Masahiko Tani, Kazuki Horita, Tetsuya Kinoshita, Christopher T. Que, Elmer Estacio, Kohji Yamamoto, Michael I. Bakunov
    Optics Express 19(21) 19901-19906 Sep.  2011 Refereed
  • 電気光学結晶を用いたテラヘルツパルス波検出技術
    Masahiko Tani, Kohji Yamamoto
    OPTRONICS 2011(8) Aug.  2011 Not refereed
  • Development of Coherent Raman Spectroscopy in Terahertz Frequency Region Using Femtosecond Laser
    Masahiko Tani, Kohji Yamamoto, Masakazu Hibi, Mariko Yamaguchi
     40(8) pp.402(16)-408(22) Aug.  2011 Not refereed
  • フェムト秒レーザーを励起光源に用いたテラヘルツ帯コヒーレント・ラマン分光手法の開発
    Masahiko Tani, Kohji Yamamoto
    Optcal Aliance 22(2) 42134 Feb.  2011 Not refereed
  • Application of Terahertz Absorption Spectroscopy to Evaluation of Aging Variation of Medicine
    Masaya Kawase, Tadashi Saito, Masafumi Ogawa, Hideki Uejima, Yasutoshi Hatsuda, Sonoyo Kawanishi, Yoshihiko Hirotani, Michiaki Myotoku, Kenji Ikeda, Hiroki Konishi, Ikumi Iga, Junji Yamakawa, Seizi Nishizawa, Kohji Yamamoto, Masahiko Tani
    Analytical Sciences 27(2) 209-212 Feb.  2011 Refereed
  • Recognition of Sound-alike Medicine and Dynamics Study of Saturated Hydrocarbon by Terahertz-Time-Domain Spectroscopy
    Kohji Yamamoto, Keita Takagi, Ryouhei Yasuda, Hirokatsu Itoh, Itaru Torii, Kazutoshi Fukui, Masahiko Tani, Seizi Nishizawa, Masaya Kawase
    Proceedings of the 2nd THz-Bio International Workshop 31-33 Jan.  2011 Not refereed
  • Terahertz time-domain spectroscopy on biological samples
    Keisuke Tominaga, Naoki Yamamoto, Ohki Kamabara, Atsuo Tamura, Kohji Yamamoto
    Proceedings of 3rd Asia Pacific Symposium on Radiation Chemistry (APSRC 2010) Sep.  2010
  • The Complex Refractive Indices of the Liquid Crystal Mixture E7 in the THz Frequency Range
    Chan-Shan Yang, Chia-Jen Lin, Ru-Pin Pan, Christopher T. Que, Kohji Yamamoto, Masahiko Tani, Ci-Ling Pan
    J. Opt. Soc. Am. B 27(9) 1866 Sep.  2010 Refereed
  • Terahertz Time-Domain Spectroscopy on Biological Samples
    N. Yamamoto, O. Kambara, A. Tamura, K. Yamamoto, K. Tominaga
    Proceedings of 3rd Asian Pacific Symposium on Radiation Chemistry (APSRC-2010) and DAE BRNS 10th Biennial Trombay Symposium on Radiation & Photochemistry (TSRP-2010) 1 155-157 Sep.  2010 Not refereed
  • Time-Domain Coherent Anti-Stokes Raman Scattering Signal Detection for Terahertz Vibrational Spectroscopy Using Chirped Femtosecond Pulses
    Masahiko Tani, Toshiyuki Koizumi, Hisashi Sumikura, Mariko Yamaguchi, Kohji Yamamoto, Masanori Hangyo
    Applied Physics Express 3(7) 72401 Jul.  2010 Refereed
  • Microscopic Segregation of Ionic Liquid/Water Mixtures Studied by Terahertz Time-Domain Spectroscopy
    Kohji Yamamoto, Masahiko Tani, Masanori Hangyo
    Proceedings of the 3rd International Workshop on Far Infrared Technologies 2010(16A-6) Jun.  2010 Not refereed
  • Attempts to build a high-speed terahertz time-domain spectroscopic system
    Masahiko Tani, Takashi Furuya, Christopher T. Que, Kohji Yamamoto, Fumiaki Miyamaru, Seizi Nishizawa
    Proceedings of the 3 rd International Workshop on Far-Infrared Technologies 2010 (IW-FIRT2010)(16a-4) 101-105 Jun.  2010 Not refereed
  • High efficiency second harmonic generation from 1.55 ?m femtosecond laser by using BBO crystal
    Takashi Furuya, Christopher T. Que, Kazuki Horita, Kohji Yamamoto, Seizi Nishizawa, Fumiaki Miyamaru, Masahiko Tani
    Proceedings of the 3 rd International Workshop on Far-Infrared Technologies 2010 (IW-FIRT2010)(P-20) 246-249 Jun.  2010 Not refereed
  • Terahertz spectroscopy of proteins in aqueous solution
    Christopher T. Que, Alfonsina Ramundo Orlando, Kohji Yamamoto, Masahiko Tani
    Proceedings of the 3 rd International Workshop on Far-Infrared Technologies 2010 (IW-FIRT2010)(P-21) 250-253 Jun.  2010 Not refereed
  • Dependence of emission of terahertz radiation on geometrical parameters of dipole photoconductive antennas
    Fumiaki Miyamaru, Yu Saito, Kohji Yamamoto, Takashi Furuya, Seizi Nishizawa, Masahiko Tani
    Appl. Phys. Lett. 96 211104 May  2010 Refereed
  • Time-Domain Coherent Anti-Stokes Raman Scattering Signal Detection for THz Vibrational Spectroscopy Using Chirped Femtosecond-Pulses
    M. Tani, T. Koizumi, H. Sumikura, M. Yamaguchi, K. Yamamoto, M. Hangyo
    FIR-FU Center Report(FIR FU-103) May  2010 Not refereed
  • Terahertz time-domain spectroscopy of poly-L-lysine
    Atsuo Tamura, Takashi Uchino, Kohji Yamamoto, Ohki Kambara, Keisuke Tominaga
    Biopolymers 93(8) 735-739 Apr.  2010 Refereed
  • Low-frequency spectra of amino acids and short-chain peptides studied by terahertz time-domain spectroscopy
    Carlito S. Ponseca Jr., Ohki Kambara, Shintaro Kawaguchi, Kohji Yamamoto, Keisuke Tominaga
    Journal of Infrared Milli. Terahz. Waves 31 799-809 Mar.  2010 Refereed
  • Discrimination of Inflammable Liquids by Two-Dimensional Mapping of Complex Refractive Indices in the Terahertz Range
    Mariko Yamaguchi, Takeshi Ikeda, Kohji Yamamoto, Akira Matsushita, Michiaki Tatsuno, Yukio Minami, Masahiko Tani, Masanori Hangyo
    Jpn. J. Appl. Phys. 49 102401 Jan.  2010 Refereed
  • Terahertz Absorption Spectra of Original and Generic Ceftazidime
    Masaya Kawase, Tadashi Saito, Masafumi Ogawa, Hideki Uejima, Yasutoshi Hatsuda, Sonoyo Kawanishi, Yoshihiko Hirotani, Michiaki Myotoku, Kenji Ikeda, Keisuke Takano, Masanori Hangyo, Kohji Yamamoto, Masahiko Tani
    Analytical Sciences 25 1483-1485 Dec.  2009 Refereed
  • Terahertz Time-Domain Coherent Raman Spectroscopy and Its Possible Application to Analytical Measurement of Biomolecules
    Masahiko Tani, Kohji Yamamoto, Takashi Furuya, Christopher Que, Mariko Yamaguchi, Masanori Hangyo
    IEICE Technical Report ED2009-172 69-73 Nov.  2009 Not refereed
  • Terahertz characterization of semiconductor alloy AlInN: negative imaginary conductivity and its meaning
    T. T. Kang, M. Yamamoto, M. Tanaka, A. Hashimoto, A. Yamamoto, R. Sudo, A. Noda, D. W. Liu, K. Yamamoto
     34(16) 2507-2509 Aug.  2009 Refereed
  • テラヘルツ波による爆発物と引火性液体の探知
    Kohji Yamamoto
    Inspection Engineering 12(2) 42011 Feb.  2009 Not refereed
  • Low-frequency Dynamics in Condensed Phases Studied by Terahertz Radiation Spectroscopy
    O. Kambara, S. Kawaguchi, P. Dutta, C. S. Ponseca Jr., K. Ikeshima, S. Yamaguchi, S. Hirai, M. Banno, S. Naito, K. Yamamoto, K. Tominaga
     44-52 Sep.  2008
  • テラヘルツ分光分析の印刷分野応用の可能性
    Journal of Printing Science and Technology 45(3) 16-23 Jun.  2008 Not refereed
  • Terahertz time-domain spectroscopy and its application to molecular science
    EKISHO 12(2) 94-110 Apr.  2008 Refereed
  • Terahertz time-domain spectroscopy of imidazolium ionic liquids
    Kohji Yamamoto, Maasahiko Tani, Masanori Hangyo
    J. Phys. Chem. B 111(18) 4854-4859 May  2007 Refereed
  • Low-frequency dynamics of proteins studied by terahertz time-domain spectroscopy
    Mariko Yamaguchi, Kohji Yamamoto, Masahiko Tani, Masanori Hangyo
    Biophys. J. 160A-161A Jan.  2007
  • Effect of permanent dipole moments perpendicular to the molecular long axis on the terahertz absorption in liquid crystals
    S. Tanaka, Y. Okada, K. Yamamoto, Y. Takanishi, M. Tani, K. Ishikawa, M. Hangyo, and H. Takezoe
    Proceedings of SPIE 6487 648708 2007
  • Low-Frequency Spectra of Silica Glasses Studied by Terahertz Time-Domain Spectroscopy
    Kohji Yamamoto, Takashi Uchino, and Keisuke Tominaga
    Proceedings of Progress on Tunable Lasers for Ultrafast Processes and Applications (PTLUPA6) 50-51 2006
  • Terahertz time-domain spectroscopy of sulfur-containing biomolecules
    J. Opt. Soc. Am. B 22(11) 2417-2426 Nov.  2005 Refereed
  • Terahertz time-domain spectroscopy of amino acids and polypeptides
    Kohji Yamamoto, Keisuke Tominaga, Hiroaki Sasakawa, Atsuo Tamura, Hidetoshi Murakami, Hideyuki Ohtake, Noboru Sarukura
    Biophys. J. 89(3) L22-L24 Sep.  2005 Refereed
  • Application of terahertz time-domain spectroscopy to material analysis
    Kohji Yamamoto, Mariko Yamaguchi, Masahiko Tani, Masanori Hangyo
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 230 U333-U333 Aug.  2005
  • Investigation of inflammable liquids by terahertz spectroscopy
    Takeshi Ikeda, Akira Matsushita, Michiaki Tatsuno, Yukio Minami, Mariko Yamaguchi, Kohji Yamamoto, Masahiko Tani, Masanori Hangyo
    Appl. Phys. Lett. 87(3) 34105 Jul.  2005 Refereed
  • Low-frequency spectra of the hexamethylbenzene/tetracyanoethylene electron donor-acceptor complexes in solution studied by terahertz time-domain spectroscopy
    Kohji Yamamoto, Md. Humayun Kabir, Michitoshi Hayashi, Keisuke Tominaga
    Phys. Chem. Chem. Phys. 7(9) 1945-1952 Apr.  2005 Refereed
  • Terahertz absorption spectra of L-, D-, and DL-alanine and their application to determination of enantiometric composition
    6. Mariko Yamaguchi, Fumiaki Miyamaru, Kohji Yamamoto, Masahiko Tani, Masanori Hangyo
    Appl. Phys. Lett. 86(5) 53903 Jan.  2005 Refereed
  • Degradation diagnosis of ultrahigh-molecular weight polyethylene with terahertz-time-domain spectroscopy
    Kohji Yamamoto, Mariko Yamaguchi, Masahikjo Tani, Masanori Hangyo, Satoshi Teramura, Toshiro Isu, Naohide Tomita
    Appl. Phys. Lett. 85(22) 5194-5196 Nov.  2004 Refereed
  • Noninvasive inspection of C-4 explosive in mails by terahertz time-domain spectroscopy
    Kohji Yamamoto, Mariko Yamaguchi, Fumiaki Miyamaru, Masahiko Tani, Masanori Hangyo, Takeshi Ikeda, Akira Matushita, Kenji Koide, Michiaki Tatsuno, Yukio Minami
    Japanese Journal of Applied Physics 43(3B) L414-L417 Mar.  2004 Refereed
  • Terahertz Radiation Spectroscopy on Chloroform Confined in Porous Silica Glasses
    K. Yamamoto, T. Sato, H. Okuno, K. Tominaga, S. Saito, B. J. Loughnane, A. Scodinu, and J. T. Fourkas
    Materials Research Society Symposium Proceedings 790(29) 42010 2004 Refereed
  • Terahertz-time-domain spectroscopy on electron-donor-acceptor complex in solutions
    Kohji Yamamoto, Keisuke Tominaga
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 225 Mar.  2003
  • Far-infrared absorption measurements of polypeptides and cytochrome c by THz radiation
    Kohji Yamamoto, Keisuke Tominaga, Hiroaki Sasakawa, Atsuo Tamura, Hidetoshi Murakami, Hideyuki Ohtake, Nobuhiko Sarukura
    Bull. Chem Soc. Jpn 75(5) 1083-1092 May  2002 Refereed
  • Construction of novel nanosecond temperature jump apparatuses applicable to Raman measurements and direct observation of transient temperature
    Kohji Yamamoto, Yasuhisa Mizutani, Teizo Kitagawa
    Appl. Spectrosc. 54(11) 1591-1604 Nov.  2000 Refereed
  • Nanosecond temperature jump and time-resolved Raman study of thermal unfolding of Ribonuclease A
    Kohji Yamamoto, Yasuhisa Mizutani, Teizo Kitagawa
    Biophys. J. 79(1) 485-495 Jul.  2000 Refereed
  • Vacuum ultraviolet ellipsometer using inclined detector as analyzer to measure stokes parameters and optical constants ― With results for AlN optical constants
    T.Saito, K.Ozaki, K.Fukui, H.Iwai, Kohji.Yamamoto, H.Miyake, K.Hiramatsu
     571(3) 517-521 Nov.  2014 Refereed
  • Interruption-assisted epitaxy of faceted p-InAs on buffered GaSb for terahertz emitters
    Sadia, Cyril P.;Muldera, Joselito;Estacio, Elmer S.;Somintac, Armando S.;Salvador, Arnel A.;Que, Christopher T.;Yamamoto, Kohji;Tani, Masahiko
    APPLIED PHYSICS EXPRESS 8(3) Feb.  2015 Refereed
  • Confined photocarrier transport in InAs pyramidal quantum dots via terahertz time-domain spectroscopy
    Presto, Jorge Michael M.;Prieto, Elizabeth Ann P.;Omambac, Karim M.;Afalla, Jessica Pauline C.;Lumantas, Deborah Anne O.;Salvador, Arnel A.;Somintac, Armando S.;Estacio, Elmer S.;Yamamoto, Kohji;Tani, Masahiko
    OPTICS EXPRESS 23(11) 14532-14540 Jun.  2015 Refereed
  • Dynamics of Optically-Generated Carriers in Si (100) and Si (111) Substrate-Grown GaAs/AlGaAs Core-Shell Nanowires
    delos Santos, Ramon;Ibanes, Jasher John;Balgos, Maria Herminia;Jaculbia, Rafael;Afalla, Jessica Pauline;Bailon-Somintac, Michelle;Estacio, Elmer;Salvador, Arnel;Somintac, Armando;Que, Christopher;Tsuzuki, Satoshi;Yamamoto, Kohji;Tani, Masahiko
    NANOSCALE RESEARCH LETTERS 10 10:337-(5) Dec.  2015 Refereed
  • Terahertz emission characteristics of GaMnAs dilute magnetic semiconductor under 650 mT external magnetic field
    De los Reyes, Alexander;Prieto, Elizabeth Ann;Omambac, Karim;Porquez, Jeremy;Lopez, Lorenzo, Jr.;Gonzales, Karl Cedric;Vasquez, John Daniel;Tumanguil, Mae Agatha;Muldera, Joselito;Yamamoto, Kohji;Tani, Masahiko;Somintac, Armando;Estacio, Elmer;Salvador, Arnel
    CURRENT APPLIED PHYSICS 17(4) 522-526 Apr.  2017 Refereed
  • Influence of OH-group concentration on optical properties of silica glass in terahertz frequency region
    Tsuzuki Satoshi;Kuzuu Nobu;Horikoshi Hideharu;Saito Katsuya;Yamamoto Kohji;Tani Masahiko
    Appl. Phys. Express 8(7) 072402-(4) Jun.  2015 Refereed
    We evaluated the optical properties of various types of silica glass with different OH-group concentrations by using terahertz (THz) time-domain spectroscopy. The results show that the absorption coefficient in the THz frequency region varied with the OH-group concentration and that the variation depended only on the OH-group concentration, irrespective of the glass-manufacturing process. On the other hand, the refractive index did not depend on the OH-group concentration. Thus, the THz optical properties of silica glass can be predicted based on the OH-group concentration in the glass, and vice versa.

Conference Activities & Talks

  • Low Temperature-Grown GaAs Carrier Lifetime Measurements Using "Double Optical Pump" Terahertz Time-Domain Emission Spectroscopy
    Valynn Katrine Mag-usara, Stefan Funkner, Gudrun Niehues, Elizabeth Ann Prieto, Armando Somintac, Elmer Estacio, Arnel Salvador, Kohji Yamamoto, Muneaki Hase, Masahiko Tani
     Sep.  2015
  • Nonlinear responses of the vibrational bands in L-histidine via a monocycle intense THz pulse irradiation
    Ali Khumaeni, Hideaki Kitahara, Daiki Gotoh, Takashi Furuya, Kohji Yamamoto, Masahiko Tani
     Nov.  2016
  • レ-ザ-カオスと超集束効果を用いたTHz-TDS装置における金属V溝幅の影響
    桒島史欣, 白尾拓也, 赤峰勇佑, 岩尾憲幸, 大井真夏, 坂上直哉, 白崎拓郎, 合田汐里, 谷正彦, 栗原一嘉,山本晃司, 森川治, 北原英明, 長島健, 中嶋誠
     Mar.  2017
  • Saturated absorption of vibrational band in antibiotic via an intense terahertz emission generated by tilted-pump-pulse-front scheme
    Ali Khumaeni, Hideaki Kitahara, Daiki Gotoh, Takashi Furuya, Kohji Yamamoto, Jessica Afalla, Masahiko Tani
     Mar.  2017
  • Non-ellipsometric electro-optic sampling detection of THz pulses based on Cherenkov phase-matching
    Masahiko Tani, Shogo Azuma, Satoshi Tsuzuki, Takashi Furuya, Hideaki Kitahara, Elmer S. Estacio, Kazuyoshi Kurihara, Kohji Yamamoto, and Michael Bakunov
    5th EOS Topical Meeting on Terahertz Science & Technology (TST 2016) May  2016
  • High-efficient THz Time Domain Spectroscopy using Laser Chaos and Super Focusing with Metal V-grooved Waveguide
    Kazuyuki Iwao, Yusuke Akamine, Manatsu Oi, Shiori Gouda, Naoya Sakaue, Takurou Shirasaki, Fumiyoshi Kuwashima, Masahiko Tani, Kazuyoshi Kurihara, Kohji Yamamoto, Takeshi Nagashima, Makoto Nakazima, Masanori Hangyo
    XXXVI Dynamics Days Europe Jun.  2016
  • Techniques of electro-optics sampling for efficient detection of terahertz waves
    Masahiko Tani, Takuro Yasumoto, Daiki Goto, Valynn Katrine Mag-usara, Takashi Furuya, Hideaki Kitahara, Ali Khumaeni, Elmer S. Estacio, Kazuyoshi Kurihara, Kohji Yamamoto, and Michael Bakunov
    The 34th Samahang Pisika ng Pilipinas (SPP, Physics Society of the Philippines) Aug.  2016
  • Influence of spectral filtering in heterodyne terahertz electro-optic sampling
    Daiki Goto, Hiroyuki Kato, Takuro Yasumoto, Hideaki Kitahara, TakashiFuruya, Kohji Yamamoto, Elmer Estacio, Michael I. Bakunov, Masahiko Tani
    The 34th Samahang Pisika ng Pilipinas (SPP, Physics Society of the Philippines) Aug.  2016
  • Heterodyne electro-optic sampling of terahertz waves with divergent probe beam
    Takuro Yasumoto, Hiroyuki Kato, Daiki Goto, Hideaki Kitahara, Kohji Yamamoto, Takashi Furuya, Michael Bakunov, and Elmer S. Estacio
    The 34th Samahang Pisika ng Pilipinas (SPP, Physics Society of the Philippines) Physics Conference and Annual Meeting Aug.  2016
  • Terahertz emission from InSb and GaAs under 650 mT magnetic field
    A. E. De Los Reyes, L. Lopez, Jr., J. Muldera, E. A. Prieto, A. Somintac, A. Salvador, K. Yamamoto, M. Tani, E. Estacio
    The 34th Samahang Pisika ng Pilipinas (SPP, Physics Society of the Philippines) Physics Conference and Annual Meeting Aug.  2016
  • Improvement Of Heterodyne THz Electro-Optic Sampling Technique
    Masahiko Tani, Takuro Yasumoto, Daiki Gotoh, Hideaki Kitahara, Takashi Furuya, Kohji Yamamoto, Michael Bakunov
    41st International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2016
  • Plasmonic Superfocusing Modes of THz Waves in Metallic V-groove Tapered Waveguide Considered by Quasi-Separation of Variables
    Kazuyoshi Kurihara, Fumiyoshi Kuwashima, Osamu Morikawa, Kohji Yamamoto, Masahiko Tani
    41st International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2016
  • High Efficient MLD-THz-TDS Systems Using Laser Chaos And Super Focusing With Metal V-grooved Waveguide
    Fumiyoshi Kuwashima, Takuya Shirao, Toshihiro Kishibata, Yusuke Akamine, Kazuyuki Iwao, Manatsu Ooi, Naoya Sakaue, Takuro Shirasaki, Siori Gouda, Masahiko tani, Kazuyosi Kurihara, Kohji Yamamoto, Takeshi Nagashima, Makoto Nakajima, Masanori Hangyo
    41st International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2017
  • Cherenkov-type Generation And Detection Of Terahertz Radiation In A GaAs With Metal-coat Structure
    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, Elmer Estacio
    41st International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2016
  • Heterodyne Terahertz Electro-optic Sampling Using DAST Crystal
    Hideaki Kitahara, Takuro Yasumoto, Kohji Yamamoto, Takashi Furuya, Takashi Notake, Hiroaki Minamide, Michael Bakunov, Masahiko Tani
    41st International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2016
  • Terahertz Coherent Raman Spectroscopy Of Dimethyl Sulfoxide And Water Mixtures Using Frequency Chirped Pulses
    Shun Nakae, Stefan Funkner, Kazuko Mizuno, Satoshi Nagata, Gudrun Niehues, Takashi Furuya, Hideaki Kitahara, Kohji Yamamoto, Masahiko Tani
    41st International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2016
  • Electro-optic sampling detection of THz pulses based on Cherenkov phase-matching
    Masahiko Tani, Takashi Furuya, Hideaki Kitahara, Elmer S. Estacio, Kazuyoshi Kurihara, Kohji Yamamoto, Daiki Gotoh, Takuro Yasumoto, Takashi Notake, Hiroaki Minamide, and Michael Bakunov
    SPIE/COS Photonics Asia 2016, Infrared, Millimeter-Wave, and Terahertz Technologies IV Oct.  2016
  • High efficient THz-TDS system using laser chaos and super focusing with metal V-grooved waveguides
    Fumiyoshi Kuwashima, Takuya Shirao, Toshihiro Kishibata, Yusuke Akamine, Kazuyuki Iwao, Manatu Ooi, Masahiko Tani, Kazuyoshi Kurihara, Kohji Yamamoto, Takeshi Nagashima
    2016 International Symposium on Nonlinear Theory and its Applications (NOLTA2016) Nov.  2016
  • Development of Sub-Terahertz Time-Domain Spectroscopy and its Application to Molecular Science
    Keisuke Tominaga, Naoki Yamamoto, Feng Zhang, Miki Iinuma, Mariko Nakatsuka, Takafumi Nara, Hideaki Kitahara, Kohji Yamamoto, and Masahiko Tani
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • High efficient THz-TDS system Using Laser chaos and Super focusing with Metal V-grooved Wave Guides
    Fumiyoshi Kuwashima, Takuya Shirao,Toshihiro Kishibata, Yusuke Akamine, Kazuyuki Iwao, Manatu Ooi, Naoya Sakaue, Takurou Sirasaki, Siori Gouda, Masahiko Tani, Kazuyoshi Kurihara, Kohji Yamamoto, Osamu Morikawa, Takeshi Nagashima, and Makoto Nakajima
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • GHz-TDS Imaging for Materials NDT
    Dmitry S. Bulgarevich, Mitsuharu Shiwa, Makoto Watanabe, Takashi Furuya, Hideaki Kitahara, Kohji Yamamoto and Masahiko Tani
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • Characterization of Focusing of Sub-THz Radiation Using Insulator Aperture
    Osamu Morikawa, Kohji Yamamoto, Kazuyoshi Kurihara, Fumiyoshi Kuwashima and Masahiko Tani
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • Analysis of Dissociation Mechanism of Amyloid Fibrils by Using Terahertz-Time Domain Spectroscopy
    Takayasu Kawasaki Hideaki Kitahara, Takashi Furuya, Kohji Yamamoto, Masahiko Tani, Gaku Ohori, Tomoyuki Chiba and Koichi Tsukiyama
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • Effect of pump pulse width in generating highly-intense terahertz pulses using tilted-pump-pulse-front (TPPF) scheme at 800 nm
    Ali Khumaeni, Hideaki Kitahara1, Daiki Gotoh, Takashi Furuya, Kohji Yamamoto, and Masahiko Tani
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • Terahertz Coherent Raman Spectroscopy Using Terahertz Radiation by Zinc Telluride Crystal
    Shun Nakae, Stefan Funkner, Gudrun Niehues, Takashi Furuya, Hideaki Kitahara, Kohji Yamamoto, Masahiko Tani
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • Characteristics of THz plasmonic superfocusing in metallic V-groove tapered waveguides
    Kiwamu Kusama, Kazuyoshi Kurihara, Fumiyoshi Kuwashima, Osamu Morikawa, Kohji Yamamoto, and Masahiko Tani
    The 6th International Workshop on Far-Infrared Technologies (IW-FIRT 2017) and The 2nd International Symposium on Development of High Power Terahertz Science and Technology (DHP-TST 2017) Mar.  2017
  • Terahertz Superfocusing Using a Metal Tapered Parallel Waveguide and Its Application to Terahertz Time-Domain Spectroscopy of Hollow Plastic Tube
    Kohji Yamamoto, Hironori Iwasaki, Shinsei Tsuji, Ryouhei Yasuda, Kazutoshi Fukui, Kazuyoshi Kurihara, Fumiyoshi Kuwashima, Masahiko Tani
    The 37th International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2012
  • Terahertz Time-Domain Spectroscopy of CVD Diamond
    Kohji Yamamoto, Hironori Iwasaki, Shinsei Tsuji, Ryouhei Yasuda, Kazutoshi Fukui, Masahiko Tani, Takashi Shimozuma, Satoshi Ito, Teruo Saito
    The 37th International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2012
  • Analysis and Estimation of Spectrum Characteristics for Dipole Photoconductive Antenna that includes Photocurrent and Receiving Antenna Effects
    Katsunari Irie, Mikio Saigusa, Keisuke Takano, Masanori Hangyo, John Young, Kohji Yamamoto, Masahiko Tani, Takehito Suzuki
    The 37th International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2012
  • Generation of wide range and stable THz waves using an optical fiber and a laser chaos
    Fumiyoshi Kuwashima, Takuya Shirao, Masahiko Tani, Kazutoshi Fukui, Kazuyoshi Kurihara, Kohji Yamamoto, Masanori Hangyo, Takeshi Nagashima, Hiroshi Iwasawa
    The 37th International Conference on Infrared, Millimeter and Terahertz Waves Sep.  2012
  • Surface properties of transferred graphene on SiO2 investigated by AFM and LFM
    T. Yamaguchi, D. Tsunemi, T.Ishida, D. Tamakawa, Y. Kurisu, S. Tanaka, Akihiro Hashimoto, Kazutoshi Fukui, Kohji Yamamoto
    IUMRS International Conference on Electronic Materials (IUMRS-ICEM2012) Sep.  2012