"Optical properties of ZnO nanocrystals under photo-induced electron doping"
Sekika Yamamoto and Tenta Ushida,
J. Appl. Phys. 136, 064302 (2024).
"Size dependence of luminescence decay process in CsPbBr3 nanocrystals"
Yura Suzuki and Sekika Yamamoto,
J. Appl. Phys. 135, 083107 (2024).
"Highly enhanced visible luminescence in Zn1-xMgxO nanocrystals"
Sekika Yamamoto and Koji Takamura
Jpn. J. Appl. Phys. 53, 035001 (2014).
"Photoluminescence quenching in cobalt doped ZnO nanocrystals"
Sekika Yamamoto
J. Appl. Phys. 111, 094310 (2012).
"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
"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
"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)
"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
"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
"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
"Temperature Dependence of Mn2+ Optical Transition in Mn Based Semimagnetic Semiconductors"
K. Takamura, Sekika Yamamoto, el al.
The 3rd Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors, 144 - 147 (1997)
"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
"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
"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
"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
"Electron Scattering by Transition Metal Impurities in Silicon"
Sekika Yamamoto, Tyuzi Ohyama
Proceedings of 23rd Intl. Conf. Phys. Semicond. 4 (1996) 2721-2724
"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 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
"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
"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