+"Photoluminescence quenching in cobalt doped ZnO nanocrystals"~ Sekika Yamamoto~ 投稿中 +"Photo-enhanced band-edge luminescence in ZnO nanocrystals dispersed in ethanol"~ Sekika Yamamoto~ J. Phys. Chem. C 115, 21635–21640 (2011). +"Observation of Dark Exciton Luminescence from ZnO Nanocrystals in Quantum Confinement Regime"~ Sekika Yamamoto and Tomobumi Mishina,~ Phys. Rev. B 83, 165435 (2011). +"Enhanced band-edge photoluminescence from MgO passivated ZnO nanocrystals"~ Sekika Yamamoto and Tomobumi Mishina,~ J. Luminescence 131, 620 (2011). +"Exciton luminescence dynamics in ZnO crystal observed under one and two-photon excitation"~ Sekika Yamamoto, Hikari Sakuma and Tomobumi Mishina,~ Jpn. J. Appl. Phys. 49, 121102 (2010). +"Phonon screening in photochemically doped zinc oxide nanocrystals"~ Sekika Yamamoto, Tomobumi Mishina,~ J. Appl. Phys. 103 (2008) 74305. +"Decay Dynamics of Ultraviolet Photoluminescence in ZnO Nanocrystals"~ Sekika Yamamoto, Hiroyuki Yano, Tomobumi Mishina, Jun'ichiro Nakahara,~ J. Luminescence 126 (2007) 257-262. +"Pressure dependence of local structure in liquid carbon disulfide"~ Sekika Yamamoto, Yasuhiko Ishibashi, Yasuhiro Inamura, Yoshinori Katayama, Tomobumi Mishina, Jun'ichiro Nakahara,~ J. Chem. Phys. 124(2006)144511. +"Femtosecond pump-probe studies of phonons and carriers in bismuth under high pressure"~ M. Kasami, T. Ogino, T. Mishina, S. Yamamoto, J. Nakahara,~ J. Luminescence 119-120, 428-432 (2006). +"Topological Change of Fermi Surface in Bismuth under High Pressure"~ M. Kasami, T. Ogino, T. Mishina, S. Yamamoto, and J. Nakahara~ Topology in Ordered Phases: Proceedings of the 1st International Symposium on Top 2005 Sapporo, Japan 7 - 10 March 2005, 119-123 +"Coherent longitudinal acoustic phonons in pyrite"~ M. Kasami, T. Mishina, S. Yamamoto, J. Nakahara~ J.Luminescence 108 (2004) 291-295 +"OPTICAL KERR EFFECT IN CARBON DISULFIDE UNDER HIGH PRESSURE"~ A. Ishizumi, M. Kasami, T. Mishina, S. Yamamoto and J. Nakahara~ High Pressure Research vol.23 No.3 201-204 (2003) +"Dynamical and Structural Properties of Liquid Carbon Disulfide under High Pressure"~ S. Yamamoto, T. Mishina, and J. Nakahara~ Proceedings of The 3rd International Symposium on New Trends of Physics, Hokkaido University, November 11-12, 2003 +"Broad Raman scattering and luminescence in beta-carotene solution"~ R. Nakamura, S. Yamamoto, and J. Nakahara~ Journal of Chemical Physics 117 (2002) 238-247 +"Pressure dependence of low-frequency light scattering in carbon disulfide"~ A. Ishizumi, S. Yamamoto, J. Nakahara~ Journal of Luminescence 94-95 (2001) 687-690 +"Pressure Dependence of the Birefringence in AgGaS$_2$"~ M. Nakanishi, S. Yamamoto, T. Matsuhashi, D. Goshima, and J. Nakahara~ phys. stat. sol (b) 223 (2001) 325 +"Optical Properties of Chalcopyrite: Especially Related to f-electrons"~ J. Nakahara, K. Itoh, S. Yamamoto, and A. Ishizumi~ Ternary and Multinary Compounds in the 21st Century IPAP Books 1(2001)251-255 +"Line shape of excitation spectra of photoluminescence in CdMnTe and its quantum wells "~ K. Takamura, S. Yamamoto, and J. Nakahara~ Proc. 25th Intl. Conf. Phys. Semicond. 1(2001)274 +"Photoluminescence spectra of CuAlS$_2$ doped with Er"~ J. Nakahara, K. Itoh, K. Sato, S. Yamamoto~ J. Luminescece 87-89 (2000) 1112-1114 +"Energy Transfer between Mn Ions in Semimagnetic Semiconductors"~ S. Yamamoto, K. Takamura, J. Nakahara~ phys. stat. sol. (b) 211 (1999) 111-116 +"Decay Process of Photoluminescence in CdMnTe"~ J. Nakahara, K. Takamura, and S. Yamamoto~ phys. stat. sol.(b) 211 (1999) 223 +"Pressure Dependence of Photoluminescence Spectra in CuAlS$_2$ Doped with Lanthanide"~ K. Itoh, S. Yamamoto, K. Sato and J. Nakahara~ Rev. High Pressure Sci. Technol. 7 (1998) 769-771 +"Energy Relaxation between Quantum Levels and 3d-Multiplet States in Barriers of CdMnTe/CdTe Quantum Wells"~ J. Nakahara, K. Takamura, and S. Yamamoto~ Proc. 24th Intl. Conf. Phys. Semicond. (1998) VIII Defects and Impurities C-1 +"Polarized Photoluminescence with Long Lifetime in AgGaS$_2$"~ J. Nakahara, Y. Narita, K. Itoh, E. Niwa, K. Masumoto and S. Yamamoto~ phys. stat. sol (b) 210 (1998) 479 +"Excitation Spectra in CdMnTe"~ K. Takamura, S. Yamamoto, J. Watanabe, and J. Nakahara~ Proc. 11th Int. Conf. Ternary and Multinary Compounds.~ Inst. Phys. Conf. Ser. 152 (1998) 453-456 +"Optical Properties in zing-blende MnTeSb films"~ K. Takamura, S. Miyanishi, S. Yamamoto, H. Akinaga and J. Nakahara~ Proc. 11th Int. Conf. Ternary and Multinary Compounds.~ Inst. Phys. Conf. Ser. 152 (1998) 613-616 +"Decay profiles of Mn photoluminescence in CdMnTe"~ S. Yamamoto, J. D. Park and J. Nakahara~ Proc. 11th Int. Conf. Ternary and Multinary Compounds.~ Inst. Phys. Conf. Ser. 152 (1998) 457-460~ +"Electron Scattering by Mn Impurities in Si Detected by Cyclotron Resonance Measurement"~ Sekika Yamamoto, and Tyuzi Ohyama~ Jpn. J. Appl. Phys. 36 (1997) 1112-1118 +"Decay Profiles of Mn2+ Photoluminescence in CdMnTe"~ Jae Dong Park, Sekika Yamamoto, Junji Watanabe, Koji Takamura, and Jun'ichiro nakahara~ J. Phys. Soc. Jpn. 66 (1997) 3289-3293 +"Mn Concentration Dependence of Excitation Spectrum of Infrared Photo-luminescence in CdMnTe"~ K. Takamura, S. Yamamoto, J. Watanabe and J. Nakahara~ The 2nd Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors (1997) 19-22 +"Decay Profiles of Mn$^{2+}$ Photoluminescence in CdMnTe"~ J. D. Park, K. Takamura, S. Yamamoto, J. Watanabe and J. Nakahara~ The 2nd Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors (1997) 15-18 +"Temperature Dependence of Mn$^{2+}$ Optical Transition in Mn Based Semimagnetic Semiconductors"~ K. Takamura, S. Yamamoto, S. Miyanishi, H. Akinaga and J. Nakahara~ Proc. 3nd Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors (1997) 144-147 +"Pressure Dependence of Photoluminescence Spectra in CuAlS$_2$ Doped with Lanthanide"~ K. Itoh, S. Yamamoto, K. Sato and J. Nakahara~ Proc. Int. Conf. on High Pressure Sci. Tech.(AIRPT16) (1997) 769-771 +"Excitation Spectrum of infrared photoluminescence in CdMnTe"~ K. Takamura, J. D. Park, S. Yamamoto and J. Nakahara~ Transaction of the Materials Research Society of Japan Vol.20 (1996) 762-765 +"Electron Scattering by Transition Metal Impurities in Silicon"~ Sekika Yamamoto, Tyuzi Ohyama~ Proceedings of 23rd Intl. Conf. Phys. Semicond. 4 (1996) 2721-2724 +"Decay Process of CdMnTe with Variation of Excitation Power"~ J. D. Park, K. Takamura, S. Yamamoto, J. Watanabe and J. Nakahara~ Symposium on the Physics and Application of Spin-Related Phenomena in Semiconduc tors (1995) 87-88 +"Electron Scattering by Magnetic Impurity in Semiconductor"~ S. Yamamoto, T. Ohyama and J. Nakahara~ Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors (1995) 97-100 +"Influence of Interface Barrier on Lateral Transport Properties for Metal/Semiconductor Systems"~ Sekika Yamamoto, Tyuzi Ohyama, Eizo Otsuka, Syouichi Yamauchi, and Motohiro Iwami~ Jpn. J. Appl. Phys. 33 (1994) 3971-3978 +"Construction of a Soft X-Ray Emission Spectroscopy(SXES) Apparatus and Its Application for Study of Electronic and Atomic Structures of a Multilayer System."~ Motohiro Iwami, Masaaki Hirai, Masahiko Kusaka, Mosaru Kubota, Sekika Yamamoto,~ Hatsuo Nakamura, Hirokuni Watanabe, Masao Kawai, and Hiroyoshi Soezima~ Jpn. J. Appl. Phys. 29 (1990) 1353-1356