著者 Takasugi, Shota| Watanabe, Keita| Misawa, Masaaki| Tsuruta, Kenji|
備考 This fulltext is available in Feb. 2022.|
発行日 2021-02-22
出版物タイトル Japanese Journal of Applied Physics
60巻
SD号
出版者 IOP Publishing
開始ページ SDDA01
ISSN 0021-4922
NCID AA12295836
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
論文のバージョン author
DOI 10.35848/1347-4065/abe2e5
Web of Science KeyUT 000621475200001
関連URL isVersionof https://doi.org/10.35848/1347-4065/abe2e5
著者 Iida, Takumi | Ishikawa, Atsushi| Tanaka, Takuo| Muranaka, Atsuya| Uchiyama, Masanobu| Hayashi, Yasuhiko| Tsuruta, Kenji|
備考 This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Takumi Iida et. al. Super-chiral vibrational spectroscopy with metasurfaces for high-sensitive identification of alanine enantiomers. Appl. Phys. Lett. 117, 101103 (2020) and may be found at https://doi.org/10.1063/5.0012331. </br>This fulltext is available in Sep. 2021.|
発行日 2020-09-09
出版物タイトル Applied Physics Letters
117巻
10号
出版者 American Institute of Physics
開始ページ 101103
ISSN 0003-6951
NCID AA00543431
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
論文のバージョン publisher
DOI 10.1063/5.0012331
Web of Science KeyUT 000571581400002
関連URL isVersionOf https://doi.org/10.1063/5.0012331
フルテキストURL fulltext.pdf
著者 Suichi, Takahiro| Ishikawa, Atsushi| Tanaka, Takuo| Hayashi, Yasuhiko| Tsuruta, Kenji|
発行日 2020-04-16
出版物タイトル Scientific Reports
10巻
1号
出版者 Nature
開始ページ 6486
ISSN 2045-2322
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © The Author(s) 2020
論文のバージョン publisher
PubMed ID 32300158
DOI 10.1038/s41598-020-63591-7
Web of Science KeyUT 000562142100005
関連URL isVersionOf https://doi.org/10.1038/s41598-020-63591-7
フルテキストURL JJAP_59.pdf
著者 Watanabe, Keita| Fujita, Mikiya| Tsuruta, Kenji|
備考 This fulltext is available in Apr. 2021.|
発行日 2020-04-06
出版物タイトル Japanese Journal of Applied Physics
59巻
SK号
出版者 Japan Society of Applied Physics
開始ページ SKKA06
ISSN 0021-4922
NCID AA12295836
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © 2020 The Japan Society of Applied Physics
論文のバージョン author
DOI 10.35848/1347-4065/ab7e3e
Web of Science KeyUT 000546613200005
オフィシャル URL https://iopscience.iop.org/article/10.35848/1347-4065/ab7e3e|
フルテキストURL fulltext.pdf
著者 Hada, Masaki| Yamaguchi, Daisuke| Ishikawa, Tadahiko| Sawa, Takayoshi| Tsuruta, Kenji| Ishikawa, Ken| Koshihara, Shin-Ya| Hayashi, Yasuhiko| Kato, Takashi|
発行日 2019-09-13
出版物タイトル Nature Communications
10巻
出版者 Nature Publishing Group
開始ページ 4159
ISSN 2041-1723
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © The Author(s) 2019
論文のバージョン publisher
PubMed ID 31519876
DOI 10.1038/s41467-019-12116-6
Web of Science KeyUT 000485685200005
関連URL isVersionOf https://doi.org/10.1038/s41467-019-12116-6
JaLCDOI 10.18926/46999
フルテキストURL mfe_36_1_041_049.pdf
著者 Totsuji, Hiroo| Kishimoto, Tokunari| Totsuji, Chieko| Tsuruta, Kenji|
抄録 The ground state of spherical clusters of charged particles of one species confined by the three-dimensional parabolic potential is investigated by molecular dynamics simulations with the system size from N = 5000 to N = 1.2 × 10(5) . The cohesive energy per particle is compared between the shell-structured clusters and spherical finite bcc lattices with relaxed surfaces, the former and the latter being the ground states for small systems and for the large enough systems, respectively. It is shown that, when N > N(c)(N(c) > N), finite bcc lattices with relaxed surfaces (the shell structures) have stronger cohesion than the shell structures (finite bcc lattices with relaxed surfaces) and the critical value of the transition N(c) is estimated to be 10(4) < N(c) < 1.4 × 10(4) . The nucleation of the bcc lattice in the shell-structured cluster of 2 × 10(4) ions is observed.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 41
終了ページ 49
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80015112663
JaLCDOI 10.18926/46968
フルテキストURL mfe_37_1_011_014.pdf
著者 Totsuji, Chieko| Limant, Muhammad S.| Tsuruta, Kenji| Totsuji, Hiroo|
抄録 A theoretical approach which has been successful in reproducing results of molecular-dynamics simulations on dusty plasmas is applied to estimate the screening length and the electric charge of two-dimensional dust crystals of melamine particles in the discharge chamber experiment. It has been found that the screening length is of the same order of magnitude as the inter-particle distance and the electric charge decreases on increasing number density of dust particles.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2002-11
37巻
1号
開始ページ 11
終了ページ 14
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80015784816
JaLCDOI 10.18926/46950
フルテキストURL mfe_38_1-2_033_037.pdf
著者 Liman, M. Sanusi| Totsuji, Chieko| Tsuruta, Kenji| Totsuji, Hiroo|
抄録 The dynamic structure factor and the spectrum of the momentum-density fluctuations of 2D Yukawa liquids are analyzed in the domain of weak and intermediate coupling and screenlng parameters. The dispersion relations of the longitudinal and transverse collective excitations are obtained and compared with the random phase approximation (RPA) and harmonic approximation for triangular lattice.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2004-03
38巻
1-2号
開始ページ 33
終了ページ 37
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80016863329
JaLCDOI 10.18926/46949
フルテキストURL mfe_38_1-2_029_032.pdf
著者 Totsuji, Hiroo| Totsuji, Chieko| Ogawa, Takafumi| Tsuruta, Kenji|
抄録 The structure of dust particles in dusty plasmas under microgravity has been analyzed by molecular dynamics simulation. The charge neutrality condition satisfied by the system composed of dust particles and ambient plasma is properly taken into account. It is shown that dust particles form shell structures at low temperatures and the number of shells are obtained as a phase diagram in the plane of two parameters characterizing the system: the number of particles and the strength of screening. It is also shown that these structures are almost independent of the strength of screening.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2004-03
38巻
1-2号
開始ページ 29
終了ページ 32
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80016863328
著者 Totsuji, Hiroo| Liman, M. Sanusi| Totsuji, Chieko| Tsuruta, Kenji|
発行日 2004-7
出版物タイトル Physical Review E
70巻
1号
資料タイプ 学術雑誌論文
著者 Totsuji, Hiroo| Ogawa, Takafumi| Totsuji, Chieko| Tsuruta, Kenji|
発行日 2005-9
出版物タイトル Physical Review E
72巻
3号
資料タイプ 学術雑誌論文
著者 Totsuji, Hiroo| Totsuji, Chieko| Ogawa, Takafumi| Tsuruta, Kenji|
発行日 2005-4
出版物タイトル Physical Review E
71巻
4号
資料タイプ 学術雑誌論文
JaLCDOI 10.18926/19954
フルテキストURL Mem_Fac_Eng_OU_44_7.pdf
著者 Maetani Noriaki| Kurose Tomoyuki| 鶴田 健二|
抄録 The lens effect of acoustic waves in a two-dimensional (2D) phononic crystal is studied by numerical simulation based on the finite-difference time-domain (FDTD) method. We calculate the phonon band structure of 2D phononic crystals, consisting of metal cylinders placed periodically in water. Lens effect is observed by the negative refraction of acoustic waves, which results in refocusing of the waves at the point outside the crystal. To increase the focal intensity, we introduce a 2D phononic crystal shield with a different composition of material, which returns the incident waves back to the lens via the perfect reflection. Also, the dependence on filling fraction of metal in the crystal is studied.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2010-01
44巻
開始ページ 7
終了ページ 12
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002309019
JaLCDOI 10.18926/19953
フルテキストURL Mem_Fac_Eng_OU_44_1.pdf
著者 Nagai Shinji| Umeda Ryosuke| 鶴田 健二|
抄録 In this paper, we investigate a light-confinement phenomenon in the structure which has triangular latice composed of Double NeGative Metamaterial (DNGM). In geometrical optics consideration, this structure is expected to confine lights completely by sequential refractions in the structure. We demonstrate it by using the two dimensional finite-difference time-domain simulations. We introduce Drude-Lorentz model for dielectric and magnetic dispersion of the material at optical frequencies. We analyze quantitatively the effects of energy loss in the DNGM on the light-confinement efficiency.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2010-01
44巻
開始ページ 1
終了ページ 6
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002309117
JaLCDOI 10.18926/19674
フルテキストURL Mem_Fac_Eng_OU_33_2_71.pdf
著者 鶴田 健二| 東辻 浩夫| 東辻 千枝子|
抄録 A parallel tight-binding molecular dynamics with an order-N [O(N))] algorithm is implemented to perform large-scale simulation of nanostructured materials. The algorithm is based on the Fermi-operator expansion of an electronic energy and force, and we present its basic formalisms. Accuracy necessary for molecular-dynamics simulations can be obtained by a proper truncation in the expansion. Parallel efficiency on a parallel PC cluster shows nearly ideal scaling behavior with respect to the number of processors. Applicability of the method to a silicon-carbide system is examined.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1999-04-27
33巻
2号
開始ページ 71
終了ページ 77
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309027
JaLCDOI 10.18926/19673
フルテキストURL Mem_Fac_Eng_OU_33_2_61.pdf
著者 東辻 浩夫| 鶴田 健二| 東辻 千枝子|
抄録 The behavior of multicomponent plasmas in the Penning-Malmberg traps is discussed with the parameters corresponding to experiments with antiprotons and cryogenic electrons. The relaxation times for the energy transfer antiprotons to electrons and between parallel and perpendicular components of electrons are estimated. It is shown that, depending on the values of parameters, both the former and the latter can be the bottleneck in the cooling process.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1999-04-27
33巻
2号
開始ページ 61
終了ページ 69
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309106
JaLCDOI 10.18926/19671
フルテキストURL Mem_Fac_Eng_OU_33_2_51.pdf
著者 東辻 浩夫| 鶴田 健二| 東辻 千枝子|
抄録 Density functional molecular dynamics method is applied to hydrogen plasma in the domain of liquid metallic hydrogen. Tentative results for the proton-proton pair distribution function and the electron-proton pair distribution function are obtained. It is shown that with the increase of the parameter γ(s), we have increasingly strong screening of proton charge by electrons and the decrease of electron density in the domain between protons.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1999-04-27
33巻
2号
開始ページ 51
終了ページ 59
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309192
JaLCDOI 10.18926/17831
フルテキストURL Mem_Fac_Eng_OU_43_22.pdf
著者 東辻 浩夫| Chai Hong| 東辻 千枝子| 鶴田 健二|
抄録 For the transfer of quantum information and the creation of entangled states, the application of tuned spin chains, systems of spins with the nearest-neighbor coupling tuned so as to give high efficiency, has been proposed and some examples of high performance have been given by several authors. In this article, the effect of deviations from tuned values and the effect of resultant asymmetry are investigated through numerical simulations and theoretical analyses. It is shown that there exists a system where the transfer efficiency is comparable with exactly tuned ones and, at the same time, robust to noises in the coupling constants. It is also shown that the effect of asymmetry on the efficiency of entanglement creation is of the second order when the asymmetry is small.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 22
終了ページ 26
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002308966
JaLCDOI 10.18926/17829
フルテキストURL Mem_Fac_Eng_OU_43_16.pdf
著者 Kurose Tomoyuki| 鶴田 健二| 東辻 千枝子| 東辻 浩夫|
抄録 The finite-difference time-domain (FDTD) method has been applied to the calculation of the phonon band structure of two-dimensional (2D) phononic crystals, consisting of metal cylinders placed periodically in liquid. By comparing several combinations of materials for metal cylinder and liquid, we analyze the dependence of the band structures on sound speed and density of liquid media. Moreover, the negative refraction of the acoustic waves is observed at the interfaces between phononic crystal slab and the liquid. We find that an acoustic“lens effect”with the slab appears due to the negative refractions. The relationship between the focal intensity in the lens effect and the band structure is discussed.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 16
終了ページ 21
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002308928
JaLCDOI 10.18926/17826
フルテキストURL Mem_Fac_Eng_OU_43_8.pdf
著者 Umeda Ryosuke| 東辻 千枝子| 鶴田 健二| 東辻 浩夫|
抄録 Metamaterial which has negative permittivity and permeability is investigated via computer simulations. Effects of the nanostructure on dielectric and magnetic properties of the material are taken into account by introducing the Drude-Lorentz model in the materials dispersion. We include multi-band process in the dielectric response in order to reproduce accurately experimental values of bulk Au thin film. Size effect on the dispersion is examined by comparing the model with that of a noble metal particle. Based on the dispersion model constructed, we analyze the electromagnetic response of nanostructured metamaterials to evanescent waves at microwave and optical frequencies via finite-difference time-domain simulatioins on parallel computer. A re- focusing and an amplification of the evanescent waves propagating through a metamaterial, consisting of metal slab/vacuum stacking, is demonstrated for the frequencies of 30GHz and 744THz.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2009-01
43巻
開始ページ 8
終了ページ 15
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002308833