Sekika Yamamoto

Profile Information

Affiliation: Research Associate, Faculty of Science, Department of Physics, Hokkaido University

Degree: (BLANK)(Osaka University)
(BLANK)(Osaka University)

J-GLOBAL ID: 200901054277827400
researchmap Member ID: 1000181648

Research Areas

Natural sciences / Semiconductors, optical and atomic physics /

Education

- 1995

Osaka University
- 1995

Physics, Graduate School, Division of Natural Science, Osaka University
- 1990

Department of Physics, Faculty of Science, Okayama University
- 1990

Faculty of Science, Okayama University

Papers

Optical properties of ZnO nanocrystals under photo-induced electron doping

Sekika Yamamoto, Tenta Ushida

Journal of Applied Physics, Aug 14, 2024
Highly enhanced visible luminescence in Zn1-xMgxO nanocrystals

Sekika Yamamoto

Japanese Journal of Applied Physics, 53(3), Mar, 2014 Peer-reviewed
Photoluminescence quenching in cobalt doped ZnO nanocrystals

Sekika Yamamoto

Journal of Applied Physics, 111(9), May, 2012 Peer-reviewed
Observation of dark exciton luminescence from ZnO nanocrystals in the quantum confinement regime

Sekika Yamamoto, Tomobumi Mishina

Physical Review B - Condensed Matter and Materials Physics, 83(16), Apr 22, 2011 Peer-reviewed
Photo-enhanced band-edge luminescence in ZnO nanocrystals dispersed in ethanol

Sekika Yamamoto

Journal of Physical Chemistry C, 115(44) 21635-21640, Nov, 2011 Peer-reviewed
Enhanced band-edge photoluminescence from MgO passivated ZnO nanocrystals

Sekika Yamamoto

Journal of Luminescence, 131(4) 620-622, Apr, 2011 Peer-reviewed
Exciton luminescence dynamics in ZnO crystal observed under one and two-photon excitation

Sekika Yamamoto

japanese Journal of Applied Physics, 49(12), 2010 Peer-reviewed
Phonon screening in photochemically doped zinc oxide nanocrystals

Sekika Yamamoto

Journal of Applied Physics, 103(7) 74305, Apr, 2008 Peer-reviewed
Decay Dynamics of Ultraviolet Photoluminescence in ZnO Nanocrystals

Sekika Yamamoto

Journal of Luminescence, 126(1) 257-262, Sep, 2007 Peer-reviewed
Femtosecond pump-probe studies of phonons and carriers in bismuth under high pressure

M Kasami, T Ogino, T Mishina, S Yamamoto, J Nakahara

JOURNAL OF LUMINESCENCE, 119 428-432, Jul, 2006 Peer-reviewed
Femtosecond pump-probe studies of phonons and carriers in bismuth under high pressure

M Kasami, T Ogino, T Mishina, S Yamamoto, J Nakahara

JOURNAL OF LUMINESCENCE, 119 428-432, Jul, 2006 Peer-reviewed
Pressure dependence of local structure in liquid carbon disulfide

Sekika Yamamoto

Journal of Chemical Physics, 124(14) 144511, Apr, 2006 Peer-reviewed
Topological Change of Fermi Surface in Bismuth under High Pressure

M. Kasami, T. Ogino, T. Mishina, S. Yamamoto, J. Nakahara

Topology in Ordered Phases: Proceedings of the 1st International Symposium on Top 2005 Sapporo, 119-123, 2005 Peer-reviewed
Coherent longitudinal acoustic phonons in pyrite

M Kasami, T Mishina, S Yamamoto, J Nakahara

JOURNAL OF LUMINESCENCE, 108(1-4) 291-295, Jun, 2004 Peer-reviewed
Optical Kerr effect in carbon disulfide under high pressure

A Ishizumi, M Kasami, T Mishina, S Yamamoto, J Nakahara

HIGH PRESSURE RESEARCH, 23(3) 201-204, Sep, 2003 Peer-reviewed
Dynamical and Structural Properties of Liquid Carbon Disulfide under High Pressure

S. Yamamoto, T. Mishina, J. Nakahara

Proceedings of The 3rd International Symposium on New Trends of Physics, Hokkaido University, November 11-12, 2003, 2003 Peer-reviewed
Broad Raman scattering and luminescence in beta-carotene solution

R Nakamura, S Yamamoto, J Nakahara

JOURNAL OF CHEMICAL PHYSICS, 117(1) 238-247, Jul, 2002
Pressure dependence of low-frequency light scattering in carbon disulfide

A Ishizumi, S Yamamoto, J Nakahara

JOURNAL OF LUMINESCENCE, 94 687-690, Dec, 2001
Pressure dependence of the birefringence in AgGaS2

M Nakanishi, S Yamamoto, T Matsuhashi, D Goshima, J Nakahara

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 223(1) 325-329, Jan, 2001
Line shape of excitation spectra of photoluminescence in CdMnTe and its quantum wells

K Takamura, S Yamamoto, J Nakahara

PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II, 87 274-275, 2001 Peer-reviewed

Misc.

Size dependence of luminescence decay process in CsPbBr₃ nanocrystals

鈴木勇羅, 山本夕可

日本物理学会講演概要集(CD-ROM), 78(2), 2023
Energy transfer mechanism in Mn-doped lead halide perovskite nanocrystals

菅野泰平, 鈴木勇羅, 山本夕可

日本物理学会講演概要集(CD-ROM), 78(2), 2023
Luminescence decay process and exciton structure in CsPbBr₃ nanocrystals.

鈴木勇羅, 山本夕可

日本物理学会講演概要集(CD-ROM), 77(2), 2022
Size dependence in photocharged ZnO nanoparticles

牛田天太, 山本夕可

日本物理学会講演概要集(CD-ROM), 76(1), 2021
CsPbBr₃ナノ結晶の発光減衰特性の表面処理依存性

戸田健登, 山本夕可

日本物理学会講演概要集(CD-ROM), 74(2), 2019
単層チオールで修飾した金ナノ粒子の発光温度依存性

五十嵐晴子, 岩渕秀, 山本夕可

日本物理学会講演概要集(CD-ROM), 72(2), 2017
28aXB-12 Exciton dynamics in ZnO single crystal observed by time resolved two photon microscopy

Yamamoto Sekika, Sakuma Hikari, Mishina Tomobumi

Meeting abstracts of the Physical Society of Japan, 64(2) 685-685, Aug 18, 2009
22aPS-57 Structure and photoluminescence properties of ZnO:Mg nanocrystals

Yamamoto Sekika, Fujikawa Yosuke, Mishina Tomobumi

Meeting abstracts of the Physical Society of Japan, 63(2) 663-663, Aug 25, 2008
文系学生のための基礎自然科学実験の試み

池田昌隆, 佐藤久志, 山本夕可, 小野寺彰

大学の物理教育, 14(1) 42-44, Mar 15, 2008
19pPSA-36 Photoconductive properties of ZnO nanocrystal films II

Yamamoto Sekika, Yano Hiroyuki, Mishina Tomobumi, Nakahara Jun'ichiro

Meeting abstracts of the Physical Society of Japan, 62(1) 725-725, Feb 28, 2007
21pTR-11 Resonant Raman scattering in ZnO nanocrystal films

Yamamoto Sekika, Mishina Tomobumi

Meeting abstracts of the Physical Society of Japan, 62(2) 738-738, Aug 21, 2007
25aPS-68 Photoconductive properties of ZnO nanocrystal films

Yamamoto Sekika, Yano Hiroyuki, Mishina Tomobumi, Nakahara Jun'ichiro

Meeting abstracts of the Physical Society of Japan, 61(2) 613-613, Aug 18, 2006
19pXA-7 PL spectra of 4,4'-bis[9-dicarbazolyl]-2,2'-biphenyl (CBP) Single crystal and amorphous film

Son Kyung Soo, Adachi Chihaya, Kawamura Yuichiro, Mishina Tomobumi, Yamamoto Sekika, Nakahara Junichiro

Meeting abstracts of the Physical Society of Japan, 60(2) 680-680, Aug 19, 2005
20pPSB-6 Luminescence decay process in ZnO colloidal nanocrystal

Yamamoto Sekika, Yano Hiroyuki, Mishina Tomobumi, Nakahara Jun'ichiro

Meeting abstracts of the Physical Society of Japan, 60(2) 595-595, Aug 19, 2005
21aYD-5 The Study of Structural Phase Transition Dynamics in Bismuth under High Pressure with Pump-Probe Spectroscopy.

Kasami M., Aoki Y., Mishina T., Yamamoto S., Nakahara J.

Meeting abstracts of the Physical Society of Japan, 60(2) 609-609, Aug 19, 2005
19aYD-8 Carrier-dynamics in GaAs under high pressure

Aoki Y., Kasami M., Mishina T., Ymamoto S., Nakahara J.

Meeting abstracts of the Physical Society of Japan, 60(2) 565-565, Aug 19, 2005
25aXP-6 The High Excitation Effects of Photo-Excited Carriers and Coherent Phonons in Bismuth under High Pressure

Kasami M., Ogino T., Aoki Y., Mishina T., Yamamoto S., Nakahara J.

Meeting abstracts of the Physical Society of Japan, 60(1) 691-691, Mar 4, 2005
4,4’-bis[9-dicarbazolyl]-2,2’-biphenyl(CBP)のピコ秒時間分解発光スペクトル

SON Kyung Soo, 河村祐一郎, 安達千波矢, 三品具文, 山本夕可, 中原純一郎

応用物理学会学術講演会講演予稿集, 66th(3), 2005
13pPSA-64 Exciton relaxation in ZnO nano crystal dispersed in PMMA

Yano H., Yamamoto S., Mishina T., Nakahara J.

Meeting abstracts of the Physical Society of Japan, 59(2) 671-671, Aug 25, 2004
13pPSA-63 Atmosphere dependence of Photoluminescence properties of ZnO nanoparticles

Komatsu S., Yamamoto S., Mishina T., Nakahara J.

Meeting abstracts of the Physical Society of Japan, 59(2) 670-670, Aug 25, 2004

Presentations

Size dependece in photocharged ZnO nanoparticles

T. Ushida, S. Yamamoto

Mar 12, 2021
Surface treatment dependence of the luminescence decay profile of CsPbBr_3_ nano crystals

Kento Toda, Sekika Yamamoto

Sep 11, 2019
単層チオールで修飾した金ナノ粒子の発光温度依存性

五十嵐晴子, 岩渕秀, 山本夕可

日本物理学会講演概要集, Sep 23, 2017
28aXB-12 Exciton dynamics in ZnO single crystal observed by time resolved two photon microscopy

Yamamoto Sekika, Sakuma Hikari, Mishina Tomobumi

Meeting abstracts of the Physical Society of Japan, Aug 18, 2009
22aPS-57 Structure and photoluminescence properties of ZnO:Mg nanocrystals

Yamamoto Sekika, Fujikawa Yosuke, Mishina Tomobumi

Meeting abstracts of the Physical Society of Japan, Aug 25, 2008
文系学生のための基礎自然科学実験の試み

池田昌隆, 佐藤久志, 山本夕可, 小野寺彰

大学の物理教育, Mar 15, 2008
21pTR-11 Resonant Raman scattering in ZnO nanocrystal films

Yamamoto Sekika, Mishina Tomobumi

Meeting abstracts of the Physical Society of Japan, Aug 21, 2007
19pPSA-36 Photoconductive properties of ZnO nanocrystal films II

Yamamoto Sekika, Yano Hiroyuki, Mishina Tomobumi, Nakahara Jun'ichiro

Meeting abstracts of the Physical Society of Japan, Feb 28, 2007
25aPS-68 Photoconductive properties of ZnO nanocrystal films

Yamamoto Sekika, Yano Hiroyuki, Mishina Tomobumi, Nakahara Jun'ichiro

Meeting abstracts of the Physical Society of Japan, Aug 18, 2006
19pXA-7 PL spectra of 4,4'-bis[9-dicarbazolyl]-2,2'-biphenyl (CBP) Single crystal and amorphous film

Son Kyung Soo, Adachi Chihaya, Kawamura Yuichiro, Mishina Tomobumi, Yamamoto Sekika, Nakahara Junichiro

Meeting abstracts of the Physical Society of Japan, Aug 19, 2005
21aYD-5 The Study of Structural Phase Transition Dynamics in Bismuth under High Pressure with Pump-Probe Spectroscopy.

Kasami M, Aoki Y, Mishina T, Yamamoto S, Nakahara J

Meeting abstracts of the Physical Society of Japan, Aug 19, 2005
20pPSB-6 Luminescence decay process in ZnO colloidal nanocrystal

Yamamoto Sekika, Yano Hiroyuki, Mishina Tomobumi, Nakahara Jun'ichiro

Meeting abstracts of the Physical Society of Japan, Aug 19, 2005
19aYD-8 Carrier-dynamics in GaAs under high pressure

Aoki Y, Kasami M, Mishina T, Ymamoto S, Nakahara J

Meeting abstracts of the Physical Society of Japan, Aug 19, 2005
25aXP-6 The High Excitation Effects of Photo-Excited Carriers and Coherent Phonons in Bismuth under High Pressure

Kasami M, Ogino T, Aoki Y, Mishina T, Yamamoto S, Nakahara J

Meeting abstracts of the Physical Society of Japan, Mar 4, 2005
13pPSA-64 Exciton relaxation in ZnO nano crystal dispersed in PMMA

Yano H, Yamamoto S, Mishina T, Nakahara J

Meeting abstracts of the Physical Society of Japan, Aug 25, 2004
13pPSA-63 Atmosphere dependence of Photoluminescence properties of ZnO nanoparticles

Komatsu S, Yamamoto S, Mishina T, Nakahara J

Meeting abstracts of the Physical Society of Japan, Aug 25, 2004
13aXA-8 Development of a high sensitive THz-TDS system and application for layered compounds

Saito M, Kasami M, Mishina T, Yamamoto S, Nakahara J

Meeting abstracts of the Physical Society of Japan, Aug 25, 2004
12pXC-10 The Study of Photo-Excited Carrier and Phonon Dynamics in Bi under High Pressure

Kasami M, Ogino T, Ishibashi Y, Mishina T, Yamamoto S, Nakahara J

Meeting abstracts of the Physical Society of Japan, Aug 25, 2004
30aPS-44 Study of the Structural Phase Transition Dynamics in Water by Optical Kerr Effect

Baba A, Ogino T, Kasami M, Ishibashi Y, Mishina T, Yamamoto S, Nakahara J

Meeting abstracts of the Physical Society of Japan, Mar 3, 2004
Pressure dependence of the local structure of liquid carbon disulfide

Yamamoto S, Ishibashi Y, Nakahara J, Ishizumi A, Inamura Y, Katayama Y

Meeting abstracts of the Physical Society of Japan, Aug 15, 2003

Professional Memberships

Research Projects

半導体中の希薄不純物スピンによる低温電子散乱とスピンキャリアー相互作用

科学研究費助成事業, 奨励研究(A), 日本学術振興会, 1997 - 1998

山本夕可
EXCITED STATES OF 3d-ELECTRON AND LATTICE RELAXATION IN SEMIMAGNETIC-SEMICONDUCTORS

Grants-in-Aid for Scientific Research, Grant-in-Aid for General Scientific Research (B), Japan Society for the Promotion of Science, 1994 - 1995

NAKAHARA Junichiro, YAMAMOTO Sekika, WATANABE Junji
半導体の光物性
Optical properties of Semiconductors

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