Research Activities

Original papers

  1. K. Yoshioka, I. Katayama, Y. Minami, M. Kitajima, S. Yoshida, H. Shigekawa, and J. Takeda, "Real-Space Coherent Manipulation of Electrons in a Single Tunnel Junction by Single-Cycle Terahertz Electric Fields", Nature Photonics 10, pp. 762-765 (2016). (IF=31.167)

  2. M. Kobayashi, Y. Minami, C. L. Johnson, P. D. Salmans, N. R. Ellsworth, J. Takeda, J. A. Johnson, and I. Katayama, "High-Acquisition-Rate Single-Shot Pump-Probe Measurements Using Time-Stretching Method", Sci. Rep. 6, 37614: pp. 1-6 (2016). (IF=5.228)

  3. Y. Minami, K. Horiuchi, K. Masuda, J. Takeda, and I. Katayama, "Terahertz Dielectric Response of Photoexcited Carriers in Si Revealed via Single-Shot Optical-Pump and Terahertz-Probe Spectroscopy", Appl. Phys. Lett. 107, 171104: pp. 1-4 (2015). (IF=3.302)

  4. Y. Minami, K. Araki, T. D. Dao, T. Nagao, M. Kitajima, J. Takeda, and I. Katayama, "Terahertz-Induced Acceleration of Massive Dirac Electrons in Semimetal Bismuth", Sci. Rep. 5, 15870:pp. 1-6 (2015). (IF=5.578)

  5. Y. Ikegaya, H. Sakaibara, Y. Minami, I. Katayama and J. Takeda, "Real-Time Observation of Phonon-Polariton Dynamics in Ferroelectric LiNbO3 in Time-Frequency Space", Appl. Phys. Lett. 107, 062901: pp. 1-5 (2015). (IF=3.302)

  6. M. Hada, W. Oba, M. Kuwahara, I. Katayama, T. Saiki, J. Takeda, and K. G. Nakamura, "Ultrafast Time-Resolved Electron Diffraction Revealing the Nonthermal Dynamics of Near-UV Photoexcitation-Induced Amorphization in Ge2Sb2Te5", Sci. Rep. 5, 13530: pp. 1-9 (2015). (IF=5.578)

  7. J. Takeda, Y. Minami, and I. Katayama, "Time-Frequency Two-Dimensional Imaging Spectroscopy Using a Reflective Echelon Mirror", Rev. Laser Eng. 43, pp. 208-212 (2015) (in Japanese).

  8. K. Yoshioka, Y. Minami, K. Shudo, T. D. Dao, T. Nagao, M. Kitajima, J. Takeda, and I. Katayama, "Terahertz-field-induced Nonlinear Electron Delocalization in Au Nanostructures", Nano Letters 15, pp. 1036-1040 (2015). (IF=12.94)

  9. K. Sato, K. Tahara, Y. Minami, I. Katayama, M. Kitajima, H. Kawai, K. Yanagi, and J. Takeda, "Resonant Enhancement of First- and Second-Order Coherent Phonons in Metallic Single-Walled Carbon Nanotubes", Phys. Rev. B 90, 235435: pp.1-5 (2014). (IF=3.664)

  10. Y. Minami, J. Takeda, T. D. Dao, T. Nagao, M. Kitajima, and I. Katayama, "Nonlinear Electron Dynamics of Gold Ultrathin Films Induced by Intense Terahertz Waves", Appl. Phys. Lett. 105, 241107: pp.1-4 (2014). (IF=3.794)

  11. J. Takeda, I. Katayama, K. Shudo, and M. Kitajima, "Coherent phonon and surface-enhanced Raman scattering dynamics in solids", J. Lumin., 152, pp. 23-27 (2014). (IF=2.144)

  12. J. Takeda, W. Oba, Y. Minami, T. Saiki and I. Katayama, "Ultrafast Crystalline-to-Amorphous Phase Transition in Ge2Sb2Te5 Chalcogenide Alloy Thin Film Using Single-Shot Imaging Spectroscopy", Appl. Phys. Lett. 104, 261903: pp. 1-4 (2014). (IF=3.794)

  13. M. Ashida, E. Matsubara and I. Katayama, "Ultra-broadband IR and THz generation and detection with ultrashort pulses", Proc. SPIE 8964, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII, 896409, (1-15) (February 20, 2014).

  14. Y. Minami, M. Yamaki, I. Katayama and J. Takeda, "Broadband Pump-Probe Imaging Spectroscopy Applicable to Ultrafast Single-Shot Events", Appl. Phys. Exp., 7, 022402: pp. 1-3 (2014). (IF=2.731)

  15. T. Kawano, I. Katayama, J. Ohara, M. Ashida and J. Takeda, "Intermolecular THz Vibrations Relevant to Optically and Thermally Induced Magnetic Phase Transitions in the Strongly Correlated Organic Radical TTTA", J. Phys. Soc. Jpn., 014713: pp.1-6 (2014).(IF=2.087)

  16. I. Katayama, K. Sato, S. Koga, J. Takeda, S. Hishita, H. Fukidome, M. Suemitsu and M. Kitajima, "Coherent Nanoscale Optical-Phonon Wavepacket in Graphene Layers", Phys. Rev.B. 88, 245406: pp. 1-5 (2013). (IF=3.767)

  17. K. Shudo, Shimatsu, Satake and J. Takeda, "Electronic Excited States in Strongly Correlated Organic Radical 1,3,5-trithia-2,4,6-triazapentalenyl (TTTA) Adsorbed on Si(001) Surface", Phys. Chem. Chem. Phys., 15, pp. 19213-19220 (2013). (IF=3.829)

  18. Y. Minami, Y. Hayashi, J. Takeda and I. Katayama, "Single-Shot Measurement of a Terahertz Electric-Field Waveform Using a Reflective Echelon Mirror", Appl. Phys. Lett. 103, 051103: pp. 1-4 (2013). (IF=3.794)

  19. I. Katayama, R. Akai, M. Bito, E. Matsubara, and M. Ashida,“Electric Field Detection of Phase-Locked Near-Infrared Pulses Using Photoconductive Antenna”, Opt. Exp. 21, pp. 16248-16254 (2013). (IF=3.546)

  20. I. Katayama, S. Koga, J. Takeda, S. Hishita, D. Fujita and M. Kitajima, "Electron-Phonon Coupling and Defect Scatterings in Ar+-ion Implanted Graphite", J. Cer. Soc. Jpn., 121, pp. 291-294 (2013). (IF=0.736)

  21. J. Takeda and I. Katayama (Invited Paper), "Single-Shot Time-Frequency Imaging of Ultrafast Laser Pulses and Phonon-Polariton Propagation in Ferroelectric Materials", Review of Laser Engineering, 40, pp. 598-602 (2012). (in Japanese) (IF=-)

  22. M. Ando, M. Yazaki, I. Katayama, H. Ichida, S. Wakaiki, Y. Kanematsu, and J. Takeda, "Photoluminescence Dynamics due to Biexcitons and Exciton-Exciton Scattering in Layered-Type Semiconductor PbI2", Phys. Rev. B., 86, 155206: pp.1-6 (2012). (IF=3.691) 

  23. K. Yokota, J. Takeda, C. Dang, G. Han, D. N. McCarthy, T. Nagao, S. Hishita, M. Kitajima, and I. Katayama, "Surface Metallic States in Ultrathin Bi(001) Films Studied with Terahertz Time-Domain Spectroscopy", Appl. Phys. Lett., 100, 251605: pp.1-5 (2012).(IF=3.844)

  24. I. Katayama, H. Shimosato, M. Bito, K. Furusawa, M. Adachi, M. Shimada, H. Zen, S. Kimura, N. Yamamoto, M. Hosaka, M. Katoh, and M. Ashida, "Electric Field Detection of Coherent Synchrotron Radiation in a Storage Ring Generated Using Laser Bunch Slicing", Appl. Phys. Lett., 100, 111112: pp. 1-4 (2012).(IF=3.844)

  25. I. Katayama, H. Aoki, J. Takeda, H. Shimosato, M. Ashida, R. Kinjo, I. Kawayama, M. Tonouchi, M. Nagai and K. Tanaka, "Ferroelectric Soft Mode in a SrTiO3 Thin-Film Impulsively Driven to the Anharmonic Regime Using Intense Picosecond Terahertz Pulses", Phys. Rev. Lett., 108, 097401: pp. 1-5(2012). (IF=7.37)

  26. H. Sakaibara, Y. Ikegaya, I. Katayama and J. Takeda, "Single-Shot Time-Frequency Imaging Spectroscopy Using an Echelon Mirror", Opt. Lett., 37, pp. 1118-1120 (2012).(IF=3.399)

  27. T. Manaka, T. Aoki and K. Shudo, "One-dimensional Growth of Titanium Disilicide Nanocrystals on Si(113) Surface", Surf. Sci., in press (2012). (IF=2.011)

  28. I. Katayama, H. Sakaibara, and J. Takeda, "Real-Time Time?Frequency Imaging of Ultrashort Laser Pulses Using an Echelon Mirror", Jpn. J. Appl. Phys., 50, 102701: pp. 1-5 (2011). *Selected for 'spotlights' paper (http://jjap.jsap.jp/spotlights/index.html). (IF=1.058)

  29. I. Katayama, S. Koga, K. Shudo, J. Takeda, T. Shimada, A. Kubo, S. Hishita, D. Fujita, and M. Kitajima, "Ultrafast Dynamics of Surface-Enhanced Raman Scattering Due to Au Nanostructures", Nano Letters, 11, pp. 2648-2654 (2011). (IF=13.198)

  30. S. Koga, I. Katayama, S. Abe, H. Fukidome, M. Suemitsu, M. Kitajima and J. Takeda, "High-Frequency Coherent Phonons in Graphene on Silicon", Appl. Phys. Express, 4, 045101: pp. 1-3 (2011). *Selected for Virtual Journal of Ultrafast Science, 10, issue 5 (2011). (IF=3.013)

  31. H. Takahashi, Y. Kamihara, H. Koguchi, T. Atou, H. Hosono, I. Katayama, J. Takeda, M. Kitajima and K. G. Nakamura, "Coherent Optical Phonons in the Iron Oxypnictide SmFeAsO1?xFx (x=0.075)", J. Phys. Soc. Jpn. (Letter), 80, 013707: pp. 1-4 (2011). (IF=2.364)

  32. T. Kawano, I. Katayama, T. Shin, J. Wolfson, K. A. Nelson and J. Takeda, "Ultrafast Photoinduced Phase Conversion to a Metallic State in Quasi-One-dimensional Platinum Complexes under Extremely High-Density Excitation", Ultrafast Phenomena XVII (Oxford University Press, New York, 2010), pp. 311-313 (2011).

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