IMURA, Kohei

J-GLOBAL         Last updated: Dec 4, 2018 at 21:26
 
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Name
IMURA, Kohei
E-mail
imurawaseda.jp
URL
http://www.chem.waseda.ac.jp/imura/
Affiliation
Waseda University
Section
Faculty of Science and Engineering School of Advanced Science and Engineering
Job title
Professor
Research funding number
80342632

Research Areas

 
 

Published Papers

 
Imaeda Keisuke, Hasegawa Seiju, Imura Kohei
JOURNAL OF PHYSICAL CHEMISTRY LETTERS   9(14) 4075-4081   Jul 2018   [Refereed]
Kamura Yoshio, Imura Kohei
APPLIED PHYSICS LETTERS   112(24)    Jun 2018   [Refereed]
Takahata Ryo, Yamazoe Seiji, Koyasu Kiichirou, Imura Kohei, Tsukuda Tatsuya
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   140(21) 6640-6647   May 2018   [Refereed]
Imaeda Keisuke, Hasegawa Seiju, Imura Kohei
JOURNAL OF PHYSICAL CHEMISTRY C   122(13) 7399-7409   Apr 2018   [Refereed]
Mizobata, Hidetoshi; Hasegawa, Seiju; Imura, Kohei
Journal of Physical Chemistry C   121(21) 11733-11739   Jun 2017   [Refereed]
© 2017 American Chemical Society. We developed an aperture-type near-field reflection spectral imaging method to obtain optical properties of materials with a nanometer spatial resolution. We adopted a phase-stepping technique to extract genuine n...
Mizobata, Hidetoshi; Ueno, Kosei; Misawa, Hiroaki; Misawa, Hiroaki; Okamoto, Hiromi; Imura, Kohei
Optics Express   25(5) 5279-5289   Mar 2017   [Refereed]
© 2017 Optical Society of America.We examine the far-field and near-field properties of complementary screens made of nanostructured gold thin films, a rectangular nanowire and a nanovoid, using an aperturetype scanning near-field optical microsco...
M. K. Hossain, M. Kitajima, K. Imura, H. Okamoto
JOURNAL OF PHYSICAL CHEMISTRY C   121(4) 2344-2354   Feb 2017   [Refereed]
Interstitials to be active or inactive depend on the characteristics of nanoaggregate. In this perspective, near-field scanning optical microscopy has been utilized to probe well-defined monomer, dimer, tetramer, and small assembly of gold nanopar...
K. Imaeda, K. Imura
Frontiers of Plasmon Enhanced Spectroscopy Volume 2   6 121-137   2016
We investigated the surface-enhanced Raman scattering activity and spatio-temporal characteristics of plasmons excited on a rough gold film using ultrafast near-field optical microscopy. Near-field nonlinear excitation images showed a number of op...
Uchida, Takako; Yoshikawa, Takayasu; Tamura, Mamoru; Iida, Takuya; Imura, Kohei
Journal of Physical Chemistry Letters   7(18) 3652-3658   Sep 2016   [Refereed]
© 2016 American Chemical Society.Optical properties of a gold nanoparticle trimer assembly coupled with gold-coated hexagonally close-packed polystyrene microspheres were investigated by linear and nonlinear spectroscopy. The observed reflection s...
Imura, Kohei;Mizobata, Hidetoshi;Makita, Yoshihiko
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   89(12) 1518-1522   Dec 2016   [Refereed]
<p>We propose photobleaching-assisted near-field optical spectroscopy to obtain the absorption properties of nanomaterials. We used bis(3-sulfopropyl)-5,5′,6,6′-tetrachloro-11′-dioctylbenzimidacarbocyanine (C8S3) double-wall tubular J-aggregates f...
Imaeda, Keisuke; Imura, Kohei
Chemical Physics Letters   646 179-184   Nov 2015   [Refereed]
© 2016 Elsevier B.V.We performed dye-assisted two-photon-excitation imaging of plasmon modes in single gold nanoplates using a scanning near-field optical microscope. We observed that the fluorescence from the dye molecules was excited by the two-...
Nishiyama, Yoshio; Imura, Kohei; Okamoto, Hiromi; Okamoto, Hiromi
Nano Letters   15(11) 7657-7665   Nov 2015   [Refereed]
© 2015 American Chemical Society.The generation and dynamics of plasmon wave packets in single gold nanorods were observed at a spatiotemporal scale of 100 nm and 10 fs via time-resolved near-field optical microscopy. Following simultaneous excita...
K. Imura, K. Ueno, H. Misawa, H. Okamoto, D. McArthur, B. Hourahine,F. Papoff
OPTICS EXPRESS   22(10) 12189-12199   2014
Optical properties of single gold nanodiscs were studied by scanning near-field optical microscopy. Near-field transmission spectra of a single nanodisc exhibited multiple plasmon resonances in the visible to near-infrared region. Near-field trans...
M. Hossain, M. Kitajima, K. Imura, H. Okamoto
Advanced Materials Research   938 118-122   2014
Near-field scanning optical microscopy (NSOM) is known to be a technique of choice to investigate nanometric materials and their properties beyond far-field diffraction limit resulting high spatial, spectral and temporal resolution. Here in this r...
Uchida, Takako; Ichikawa, Yoichi; Imura, Kohei
Chemical Physics Letters   638 253-257   Oct 2015   [Refereed]
© 2015 Elsevier B.V. All rights reserved. We studied optical properties of hexagonally arranged gold nanoparticle trimer assembly using optical microscopy. We found that the scattering spectrum showed multiple resonances in the visible region. We ...
Hossain, Mohammad Kamal;Kitajima, Masahiro;Imura, Kohei;Okamoto, Hiromi
PLASMONICS   10(2) 447-454   Apr 2015   [Refereed]
Okamoto, Hiromi;Narushima, Tetsuya;Nishiyama, Yoshio;Imura, Kohei
PHYSICAL CHEMISTRY CHEMICAL PHYSICS   17(9) 6192-6206   Mar 2015   [Refereed]
Nishiyama, Yoshio;Imaeda, Keisuke;Imura, Kohei;Okamoto, Hiromi
JOURNAL OF PHYSICAL CHEMISTRY C   119(28) 16215-16222   Jul 2015   [Refereed]
© 2015 American Chemical Society. We applied time-resolved near-field optical microscopic measurements with ultrashort light pulses of ∼16 fs duration to observe plasmon dephasing processes in single gold nanorods. The correlation widths of the ti...
Imaeda K, Imura K
Optics express   21(22) 27481-27489   Nov 2013   [Refereed]
Imura, Kohei;Ueno, Kosei;Misawa, Hiroaki;Okamoto, Hiromi
JOURNAL OF PHYSICAL CHEMISTRY C   117(6) 2449-2454   Feb 2013   [Refereed]
Kim, Seongyong;Imura, Kohei;Lee, Minwoo;Narushima, Tetsuya;Okamoto, Hiromi;Jeong, Dae Hong
PHYSICAL CHEMISTRY CHEMICAL PHYSICS   15(12) 4146-4153   Mar 2013   [Refereed]
Shimada, Toru;Imura, Kohei;Okamoto, Hiromi;Kitajima, Masahiro
PHYSICAL CHEMISTRY CHEMICAL PHYSICS   15(12) 4265-4269   Mar 2013   [Refereed]
Okamoto, Hiromi;Imura, Kohei
JOURNAL OF PHYSICAL CHEMISTRY LETTERS   4(13) 2230-2241   Jul 2013   [Refereed]
Imaeda, Keisuke;Imura, Kohei
OPTICS EXPRESS   21(22) 27481-27489   Nov 2013   [Refereed]
Time-domain plasmon dynamics measurements by optical nanoscopy
Okamoto, Hiromi;Nishiyama, Yoshio;Narushima, Tetsuya;Imura, Kohei
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   246    Sep 2013   [Refereed]
K. Sawada, H. Nakamura, T. Maruoka, Y. Tamura, K. Imura
Plasma and Fusion Research: Regular Articles   5 S2110   2010
The optical properties of a gold nanorod were investigated by Imura et al. [J. Chem. Phys. 122, 154701 (2005)] using an apertured-type scanning near-field optical microscope (SNOM). The observed transmission image showed an oscillating pattern alo...
Wu, Hui Jun;Nishiyama, Yoshio;Narushima, Tetsuya;Imura, Kohei;Okamoto, Hiromi
APPLIED PHYSICS EXPRESS   5(6)    Jun 2012   [Refereed]
PHYS 433-Electric-field distribution at interstitial sites in linear nanohole array structures of gold revealed by near-field two-photon excitation
Kim Su Il, Imura Kohei, Okamoto Hiromi, Kim Sehun
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   236    Aug 2008   [Refereed]
Kim, Su Il;Imura, Kohei;Kim, Sehun;Okamoto, Hiromi
JOURNAL OF PHYSICAL CHEMISTRY C   115(5) 1548-1555   Feb 2011   [Refereed]
Imura Kohei;Ueno Kosei;Misawa Hiroaki;Okamoto Hiromi
Nano Letters   11(3) 960-965   Mar 2011   [Refereed]
:We report an anomalous light transmission phenomenon for a nanoaperture on an opaque screen when the aperture is covered with an opaque cap. In conventional optics, light transmission must decrease when the aperture is capped. However, we found t...
M.-K. Hossain, T. Shimada, M. Kitajima, K. Imura, H. Okamoto
JOURNAL OF MICROSCOPY-OXFORD   229(2) 327-330   2008
We have studied electromagnetic field on the surface of two-dimensional nanostructure of gold nanoparticles through two-photon-induced photoluminescence images by using scanning near-field optical microscope and far-field surface-enhanced Raman sc...
Harada, Yosuke;Imura, Kohei;Okamoto, Hiromi;Nishijima, Yoshiaki;Ueno, Kosei;Misawa, Hiroaki
JOURNAL OF APPLIED PHYSICS   110(10)    Nov 2011   [Refereed]
K. Imura, H. Okamoto
PHYSICAL REVIEW B   77(4) 41401   Jan 2008   [Refereed]
Ultrafast transient responses in single gold nanorods are visualized in real space by femtosecond pump-probe measurements using a near-field optical microscope. The observed transient images show characteristic features, and the features are stron...
Okamoto, Hiromi;Imura, Kohei;Shimada, Toru;Kitajima, Masahiro
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY   221(2-3) 154-159   Jun 2011   [Refereed]
T. Shimada, K. Imura, M. K. Mohammad, H. Okamoto, M. Kitajima
JOURNAL OF PHYSICAL CHEMISTRY C   112(11) 4033-4035   Mar 2008   [Refereed]
We. clarified the relationship between near-field optical properties and the local structure in monolayer assembly of gold nanoparticles by using scanning near-field optical microscopy (SNOM) and scanning electron microscopy (SEM). The success of ...
K. Imura, H. Okamoto
Bulletin of the Chemical Society of Japan   81(6) 659-675   Jun 2008   [Refereed]
We have developed novel methods of near-field microspectroscopy by combining near-field optical microscopy with linear and non-linear optical techniques. The developed near-field microscope achieves high spatial resolution and high time resolution...
A. Sakamoto, K. Mori, K. Imura, H. Okamoto
JOURNAL OF PHYSICAL CHEMISTRY C   115(14) 6190-6194   Apr 2011   [Refereed]
We have succeeded in nanoscale polymerization of Langmuir-Blodgett (LB) films of cadmium 10,12-pentacosadiynoate (CdPA) by near-field two-photonexcitation with femtosecond pulses. The LB films of CdPA were excited locally through an aperture of a ...
H. Okamoto, K. Imura
Japanese Journal of Applied Physics   47(7) 6055-6062   Jul 2008   [Refereed]
Near-field optical microscopy enables spectroscopic and imaging measurements with a spatial resolution far beyond the diffraction limit of light. We show in this review that spatial structures of plasmonic wavefunctions and those of enhanced optic...
M. K. Hossain, T. Shimada, M. Kitajima, K. Imura, H. Okamoto
LANGMUIR   24(17) 9241-9244   Sep 2008   [Refereed]
Spatial distribution of surface enhanced Raman activity is visualized for two-dimensional (2D) nearly close-packed and well-ordered monolayer array ofgold nanoparticles by using scanning near-field optical microscope. The 2D arrays exhibit highly ...
H. Okamoto, K. Imura
PROGRESS IN SURFACE SCIENCE   84(7-8) 199-229   Jul 2009   [Refereed]
In this article, studies on noble metal nanostructures using near-field optical microscopic imaging are reviewed. We show that near-field transmission imaging and near-field two-photon excitation imaging provide valuable methods for investigation ...
K. Imura, Y. C. Kim, S. Y. Kim, D. H. Jeong, H. Okamoto
PHYSICAL CHEMISTRY CHEMICAL PHYSICS   11(28) 5876-5881   Jul 2009   [Refereed]
We report a near-field two-photon excitation imaging technique for silver nanostructures to visualize optical fields in the vicinity of nanostructures. We have found that the excitation image of an isolated wire shows an oscillating feature along ...
Imura Kohei
Mol. Sci.   1(1) A0006 (J-STAGE)   2007
We studied single gold nanoparticles and aggregates by linear and non-linear optical methods combined with near-field optical microscopy. Near-field images of gold nanorods obtained show peculiar spatial patterns, and are strongly dependent on wav...
K. Imura, H. Okamoto
Proceeding SPIE 6471   6471 647103   2007
We investigated near-field optical properties and images of single gold nanorods by using a near-field optical microscope. Observed transmission spectra show distinct transverse and longitudinal surface plasmon resonances. Transmission images obse...
K. Imura, H. Okamoto
JOURNAL OF PHYSICAL CHEMISTRY C   113(27) 11756-11759   Jul 2009   [Refereed]
We investigated properties of photoluminescence from single gold nanorods induced by near-field two-photon excitation, using scanning near-field optical microscopy. Photoluminescence spectrum showed two peaks around 550 and 650 nm in wavelengths r...
K. Imura, H. Okamoto, M.K. Hossain, M. Kitajima
Nano Letters   6(10) 2173-2176   Oct 2006   [Refereed]
We demonstrate visualization of localized intense electromagnetic fields in real space in well-tailored dimeric and trimeric gold nanospheres by using near-field optical techniques. With two-photon induced luminescence and Raman measurements, we s...
H. Okamoto, K. Imura
Proceeding SPIE   6642 66420A   2007   [Refereed]
We report in this paper the near-field microscopic studies on localized plasmon resonances in gold nanoparticles and their assemblies (nanorods, triangular nanoplates, and assembled nanospheres). We have utilized near-field measurements of linear ...
K. Imura, H. Okamoto, M. K. Hossain, M. Kitajima
CHEMISTRY LETTERS   35(1) 78-79   2006
We observed near-field images of aggregates of gold nanospheres, by detecting TPI-PL from gold and Raman scattering from Rhodamine 6G adsorbed oil the nanoparticles. The results were analyzed in relation to the localized Raman active site (hot Spo...
K. Imura, T. Nagahara, H. Okamoto
APPLIED PHYSICS LETTERS   88(2) 023104 -1-023104 -3   2006
We have investigated two-photon-induced photoluminescence (PL) properties of single gold nanoplates by using an apertured scanning near-field optical microscope. The nanoplates show PL much stronger than nanorods. The near-field PL images show cha...
K. Imura, H. Okamoto
OPTICS LETTERS   31(10) 1474-1476   May 2006   [Refereed]
We experimentally investigated the reciprocity of scanning near-field optical microscopy between illumination and collection modes. Near-fieldtransmission images of single gold spheres and nanorods observed by the two modes are found to be equival...
K. Imura, T. Nagahara, H. Okamoto,
Journal of Chemical Physics   121(15) 154701   Apr 2005   [Refereed]
H. Okamoto, K. Imura
JOURNAL OF MATERIALS CHEMISTRY   16(40) 3920-3928   2006   [Refereed]
Scanning near- field optical microscopes enable optical measurements and observations with a spatial resolution far beyond the diffraction limit of light. This allows us to spatially resolve the positions in nanoparticles and at the same time to i...
K. Imura, T. Nagahara, H. Okamoto
The Journal of Physical Chemistry B   109(27) 13214-13220   Jul 2005   [Refereed]
We investigated the two-photon-induced photoluminescence properties of single gold nanorods by scanning near-field spectroscopy. The process was found to be initiated by a sequential one-photon absorption for creating a pair of an electron and a h...
N. Horimoto, K. Imura, H. Okamoto
CHEMICAL PHYSICS LETTERS   467(1-3) 105-109   Dec 2008   [Refereed]
We investigated the enhancement and quenching of dye fluorescence by single gold nanoparticles using an aperture-type scanning near-field optical microscope to evaluate the shape dependence. Enhancement or reduction of fluorescence was found to be...
Y. Jiang, N. N. Horimoto, K. Imura, H. Okamoto, K. Matsui, R. Shigemoto
Advanced Materials   21(22) 2309-2313   2008   [Refereed]
Cell imaging with two-photon-induced photoluminescence is demonstrated using gold nanoparticles (either triangular nanoplates or nanosphere aggregates) as imaging agents. On being conjugated to yeast cells, gold nanoplates exhibit visible two-phot...
J. K. Lim, K. Imura, T. Nagahara, S. K. Kim, H. Okamoto
Chemical Physics Letters   412(1-3) 41-45   2005
Surface plasmons of silver nanorods were investigated by using scanning near-field optical microscopy. Near-field transmission images showed spatially oscillatory patterns in nanorods. The oscillatory features of images are attributable to plasmon...
T. Nagahara, K. Imura, H. Okamoto, A. Oguro, H. Imahori
The Journal of Physical Chemistry B   109(42) 19839-19844   Oct 2005   [Refereed]
We fabricated porphyrin thin films on mica surfaces from acidic aqueous solutions of the preorganized H-aggregates of amphiphilic porphyrins by the simple spin-coating method. The morphological and spectroscopic properties of the film were investi...
Pump-Probe Near-Field Optical Microscopy of Molecular Aggregates Using Supercontinuum
T. Nagahara, K. Imura, H. Okamoto
Ultrafast Phenomena XIV, Springer Verlag   79 434-436   2005
A novel apparatus for femtosecond pump-probe near-field optical microscopy is described. Probe pulses in visible to near-infrared regions are generated by focusing laser pulses in microstructure fiber. Excited-state dynamics of porphyrin J-aggrega...
Ultrafast Near-Field Microscope Imaging of Electron and Phonon Relaxation in Single Gold Nanoparticle
K. Imura, T. Nagahara, H. Okamoto
Ultrafast Phenomena XIV, Springer Verlag   79 655-657   2005
We investigated near-field optical properties of single gold nanorods. Transmission images observed near the surface plasmon resonances agree with calculated local density of states. Ultrafast temporal responses of single rods have been imaged by ...
Tetsuhiko Nagahara, Kohei Imura, Kohei Imura, Hiromi Okamoto, Hiromi Okamoto
Springer Series in Chemical Physics   79 434-436   Dec 2004
A novel apparatus for femtosecond pump-probe near-field optical microscopy is described. Probe pulses in visible to near-infrared regions are generated by focusing laser pulses in microstructure fiber. Excited-state dynamics of porphyrin J-aggrega...
K. Imura, T. Nagahara, H. Okamoto
Springer Series in Chemical Physics   79 655-657   Dec 2004
We investigated near-field optical properties of single gold nanorods. Transmission images observed near the surface plasmon resonances agree with calculated local density of states. Ultrafast temporal responses of single rods have been imaged by ...
Tetsuhiko Nagahara, Kohei Imura, Kohei Imura, Hiromi Okamoto, Hiromi Okamoto
Scanning   26    Nov 2004
Mesoscopic properties of J-aggregates of water-soluble [tetrakis(4- sulfonatophenyl)porphyrin] and water-insoluble [tetrakis(4-methoxyphenyl) porphyrin and tetraphenylporphyrin] tetraphenylporphyrin derivatives in thin films have been investigated...
Kohei Imura, Kohei Imura, Tetsuhiko Nagahara, Hiromi Okamoto, Hiromi Okamoto
Journal of the American Chemical Society   126 12730-12731   Oct 2004
Near-field spectroscopy of water-soluble and water-insoluble porphyrin J-aggregates.
Nagahara T, Imura K, Okamoto H
Scanning   26(5 Suppl 1) I10-5   Sep 2004   [Refereed]
Kohei Imura, Kohei Imura, Hiroshi Ohoyama, Toshio Kasai, Toshio Kasai
Chemical Physics   301 183-187   Jun 2004
The transition metal-benzene (1:1) complexes are synthesized by laser evaporation method followed by the size and structure selection with 2-m long electrostatic hexapole field. Electric dipole moments of half-sandwich type binary complexes for a ...
K. Imura, T. Nagahara, H. Okamoto,
The Journal of Physical Chemistry B   108 16344-16347   2004
K. Imura, T. Nagahara, H. Okamoto,
Journal of American Chemical Society   126 12730-12731   2004
Near-Filed Spectroscopy of Water-Soluble and Water-Insoluble Porphyrin J-Aggregates
T. Nagahara, K. Imura, H. Okamoto
Scanning   26(1) 1-10   2004
T. Nagahara, K. Imura, H. Okamoto
Review of Scientific Instruments   75(11) 4528-4533   2004
A novel apparatus for time-resolved near-field optical microscopy is described. The apparatus consists of a mode-locked Ti:sapphire laser, a microstructure fiber, and a scanning near-field optical microscope equipped with an apertured optical fibe...
K. Imura, T. Nagahara, H. Okamoto
Chemical Physics Letters   400(4-6) 500-505   2004
We investigate the interaction between evanescent wave and a single gold nanoparticle in near-field by utilizing an aperture-probe scanning near-field optical microscope. A characteristic spectral feature, consisting of transmission enhancement an...
Tetsuhiko Nagahara, Kohei Imura, Kohei Imura, Hiromi Okamoto, Hiromi Okamoto
Chemical Physics Letters   381 368-375   Nov 2003
Mesoscopic properties of water-insoluble tetrakis(4-methoxyphenyl) porphyrin J-aggregate in thin film have been investigated by time-resolved scanning near-field optical microscopy. The film was found to be composed of planar microcrystallines wit...
Kohei Imura, Kohei Imura, Hiroshi Ohoyama, Toshio Kasai, Toshio Kasai
Chemical Physics Letters   369 55-59   Feb 2003
Supersonic beam of size-selected Ti-C6H6metal-ligand binary complex was generated by a laser evaporation method followed by the size selection with 2-m long electrostatic hexapole field. The dependence of the beam intensity upon the hexapole field...
Kohei Imura, Kohei Imura, Naoki Kishimoto, Koichi Ohno
Journal of Physical Chemistry A   106 3759-3765   Apr 2002
Penning ionization of HCl upon collision with metastable He*(23S) atoms was studied by two-dimensional (collision-energy/electron energy resolved) Penning ionization electron spectroscopy and by classical trajectory calculations. Collision energy ...
Kohei Imura, Naoki Kishimoto, Koichi Ohno
Journal of Physical Chemistry A   105 10781-10790   Dec 2001
Two-dimensional (collision-energy/electron-energy-resolved) Penning ionization electron spectroscopy (2DPIES) have been applied to the reaction of 1,3,5-C6H3F3 and C6F6 with metastable He (23S) atoms. Collision energy dependence of the partial ion...
Kohei Imura, Naoki Kishimoto, Koichi Ohno
Journal of Physical Chemistry A   105 9111-9122   Oct 2001
Ionization of dichlorobenzenes with metastable He*(23S) atoms was studied by two-dimensional (collision-energy/electron-energy-resolved) Penning ionization electron spectroscopy. Collision energy dependence of the partial ionization cross sections...
K. Imura, K. Imura, T. Kawashima, H. Ohoyama, T. Kasai, T. Kasai
Journal of the American Chemical Society   123 6367-6371   Oct 2001
The supersonic beams of the (1-1) metal-ligand complexes of Al-CH3CN and Al-NH3were produced by a laser evaporation method. Nondestructive structure selection of the complexes and the dipole moment determination were performed by using a 2-m elect...
K. Imura, T. Kawashima, H. Ohoyama, T. Kasai, A. Nakajima, K. Kaya
Physical Chemistry Chemical Physics   3 3593-3597   Oct 2001
A supersonic cluster beam containing isomers of Al(C6H6) complexes was generated by laser evaporation, and non-destructively selected using a 2 m long electrostatic hexapole. The focusing curve shows clear evidence that there are two kinds of Al(C...
Kohei Imura, Naoki Kishimoto, Koichi Ohno
Journal of Physical Chemistry A   105 6378-6385   Jul 2001
Penning ionization of C2H5X (X = Cl, F) upon collision with metastable He*(23S) atoms was studied by two-dimensional (collision-energy/electron energy resolved) Penning ionization electron spectroscopy. Partial ionization cross sections are found ...
Kohei Imura, Naoki Kishimoto, Koichi Ohno
Journal of Physical Chemistry A   105 6073-6083   Jun 2001
Penning ionization of difluorobenzenes upon collision with metastable He*(23S) atoms was studied by two- dimensional (collision-energy/electron-energy-resolved) Penning ionization electron spectroscopy. Collision energy dependence of the partial i...
Kohei Imura, Naoki Kishimoto, Koichi Ohno
Journal of Physical Chemistry A   105 4189-4199   May 2001
Penning ionization of C6H5X (X = F, Cl, Br, I) upon collision with metastable He*(23S) atoms was studied by two-dimensional (collision-energy/electron-energy-resolved) Penning ionization electron spectroscopy. Partial ionization cross sections are...
Kohei Imura, Kohei Imura, Hiroshi Ohoyama, Toshio Kasai, Toshio Kasai
Chemistry Letters   1136-1137   Jan 2001
Penning ionization of Ne(3P) metastable atom with size-selected HCl dimer was studied by using an electrostatic hexapole field and chemiluminescence detection. We found that the HCl dimer can also produce HCl+(A) ions in the reaction with Ne(3P) j...
K. Imura, H. Ohoyama, R. Naaman, D. C. Che, M. Hashinokuchi, T. Kasai
Journal of Molecular Structure   552 137-145   Sep 2000
The tunneling motion in (HCl)2 hydrogen bonded dimer and its deuterate was probed by a 2 m long electrostatic hexapole field. The focusing curves of the dimers confirmed the existence of homo and heterodimers in the cluster beam. The homodimer, ei...
K. Imura, K. Imura, M. Veneziani, T. Kasai, T. Kasai, R. Naaman
Journal of Chemical Physics   111 4025-4031   Sep 1999
The reaction of O(1D) with water and water clusters was re-examined. We monitored the nascent product state distributions in the reaction photo-initiated by the dissociation of N2O at 193 and 212.8 nm, and the corresponding photo-initiated intracl...
K. Imura, T. Kasai, H. Ohoyama, R. Naaman
Journal of Chemical Physics   110 355-358   Jan 1999
The focusing of HCl and DCl dimers was observed using a 2-m-long electrostatic hexapole field. The results indicate the existence of two types of species. The first is the homodimers, either the H35Cl-H35Cl or the D35Cl-D35Cl, for which the data i...
Ryotaro Midorikawa, Hiroshi Ohoyama, Kohei Imura, Toshio Kasai
Bulletin of the Chemical Society of Japan   70 1261-1265   Jan 1997
An active control for changing the relative population of the 3P0 fine-state of Ar* in a supersonic beam was investigated in a glow discharge by adding a small amount of foreign gases to pure Ar gas. The Ar* mean velocity was determined to be cons...
K. Imura, T. Kasai, H. Ohoyama, H. Takahashi, R. Naaman
Chemical Physics Letters   259 356-360   Sep 1996
HCl dimers were prepared in a pulsed supersonic beam of neat HCl. The dimers were focused in an electrostatic hexapole field. Using computer simulation, the focusing curve could be fit, assuming contributions from both first and second order Stark...
Kohei Imura, Ryotarou Midorikawa, Toshio Kasai, Hiroshi Ohoyama, Dock Chil Che
Chemistry Letters   299-300   Jan 1996
The formation ratio of the two spin-orbit states, 3P0/ 3P2, of the metastable argon, Ar*, was investigated by the glow discharge of a pulsed Ar supersonic beam. The 3P0 / 3P2 ratio decreased with the increase of the glow discharge potential Vg, by...
井村考平,岡本裕巳
日本分光学会誌   2006(55) 161-172

Misc

 
今枝佳祐, 長谷川誠樹, 井村考平
応用物理学会秋季学術講演会講演予稿集(CD-ROM)   79th ROMBUNNO.20p‐224A‐1   Sep 2018
長谷川誠樹, 今枝佳祐, 井村考平
応用物理学会春季学術講演会講演予稿集(CD-ROM)   65th ROMBUNNO.18p‐P9‐9   Mar 2018
今枝佳祐, 長谷川誠樹, 井村考平
応用物理学会春季学術講演会講演予稿集(CD-ROM)   65th ROMBUNNO.17a‐A402‐2   Mar 2018
香村惟夫, 井村考平
応用物理学会春季学術講演会講演予稿集(CD-ROM)   65th ROMBUNNO.18a‐A402‐6   Mar 2018
香村惟夫, 井村考平
分子科学討論会講演プログラム&amp;要旨(Web)   12th ROMBUNNO.3P070 (WEB ONLY)   2018
白山大樹, 今枝佳祐, 井村考平
日本分光学会年次講演会   2018 147   2018
高畑遼, 山添誠司, 山添誠司, 山添誠司, 小安喜一郎, 小安喜一郎, 井村考平, 佃達哉, 佃達哉
分子科学討論会講演プログラム&amp;要旨(Web)   12th ROMBUNNO.1B04 (WEB ONLY)   2018
今枝佳祐, 長谷川誠樹, 井村考平
分子科学討論会講演プログラム&amp;要旨(Web)   12th ROMBUNNO.1B03 (WEB ONLY)   2018
IMURA Kohei, OKAMOTO Hiromi
Bunko Kenkyu   55(3) 161-172   Jun 2006
We studied the spatial characteristics of plasmon modes in single noble metal nanoparticles (gold nanorods and others) by linear and non-linear optical methods combined with near-field optical microscopy. Near-field images of the nanoparticles obt...
井村考平, 岡本裕巳, 沼田宗典, 新海征治
分子構造総合討論会講演要旨集(CD-ROM)   2006 2P084   Aug 2006
井村考平, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2006 4C05   Aug 2006
岡本裕巳, 井村考平
光化学討論会講演要旨集   2006 95   Sep 2006
井村考平
日本分光学会年次講演会   2007 2-7   2007
Hiromi Okamoto, Kohei Imura
Molecular Nano Dynamics: Vol. I: Spectroscopic Methods and Nanostructures / Vol. II: Active Surfaces, Single Crystals and Single Biocells   1 39-54   Nov 2009
Kohei Imura, Hiromi Okamoto
Handbook of Nano-Optics and Nanophotonics   527-562   Jan 2013
© Springer-Verlag Berlin Heidelberg 2013. Plasmonic metal nanostructures exhibit unique optical properties, and fundamental studies of them are relevant to wide range of research areas. Unique characteristics of the plasmonic nanostructures origin...
Y. Nishiyama, T. Narushima, K. Imura, H. Okamoto
Optics InfoBase Conference Papers      Jan 2014
We applied ultrafast time-resolved near-field optical microscopy to spatio-temporal observation of plasmon dynamics in a gold nanorod. We found prominent changes of transient near-field images as time evolves, indicating coherent excitation of mul...
Kohei Imura
JSAP-OSA Joint Symposia, JSAP 2014      Jan 2014
Y. Nishiyama, T. Narushima, K. Imura, H. Okamoto
Springer Proceedings in Physics   162 691-693   Jan 2015
© Springer International Publishing Switzerland 2015. Plasmon dynamics in a single gold nanorod was visualized by ultrafast time-resolved near-field optical microscopy. On excitation of multiple plasmon modes, transient near-field images exhibit p...
井村考平
光学   43(4) 156-158   Apr 2014
井村 考平
光学 = Japanese journal of optics : a publication of the Optical Society of Japan, the Japan Society of Applied Physics   43(4) 156-158   Apr 2014
森本仁嗣, 井村考平
日本分光学会年次講演会   2013 78   2013
武内麻未, 井村考平
日本分光学会年次講演会   2013 80   2013
大瀬戸彬, 井村考平
日本分光学会年次講演会   2013 79   2013
大村淳, 井村考平
日本分光学会年次講演会   2013 81   2013
堤内勇貴, 溝端秀聡, 井村考平
分子科学討論会講演プログラム&amp;要旨(Web)   7th ROMBUNNO.2P039 (WEB ONLY)   2013
今枝佳祐, 井村考平
分子科学討論会講演プログラム&amp;要旨(Web)   7th ROMBUNNO.1C02 (WEB ONLY)   2013
溝端秀聡, 井村考平
分子科学討論会講演プログラム&amp;要旨(Web)   7th ROMBUNNO.2P038 (WEB ONLY)   2013
牧田賢彦, 井村考平
分子科学討論会講演プログラム&amp;要旨(Web)   7th ROMBUNNO.2P043 (WEB ONLY)   2013
西山嘉男, 成島哲也, 成島哲也, 井村考平, 岡本裕巳, 岡本裕巳
分子科学討論会講演プログラム&amp;要旨(Web)   7th ROMBUNNO.3P038 (WEB ONLY)   2013
IMURA Kohei, OKAMOTO Hiromi
レーザー研究   40(8) 571-578   Aug 2012
井村考平
旭硝子財団研究助成成果発表会   2012 38-39   Jul 2012
井村 考平, 岡本 裕巳
レーザー研究   40(8) 571-578   Aug 2012
武内麻未, 井村考平
ナノ学会大会講演予稿集   10th 207   Jun 2012
西山嘉男, WU Hui Jun, 成島哲也, 井村考平, 岡本裕巳
日本化学会講演予稿集   92nd(2) 239   Mar 2012
牧田賢彦, 井村考平
日本化学会講演予稿集   92nd(2) 288   Mar 2012
井村 考平
旭硝子財団助成研究成果報告   2012 1-4   2012
今枝佳祐, 井村考平, 井村考平
分子科学討論会講演プログラム&amp;要旨(Web)   5th ROMBUNNO.2P078 (WEB ONLY)   2011
井村考平, 井村考平, 上野貢生, 上野貢生, 三澤弘明, 岡本裕巳
分子科学討論会講演プログラム&amp;要旨(Web)   5th ROMBUNNO.4B12 (WEB ONLY)   2011
岡本裕巳, 井村考平
応用物理学関係連合講演会講演予稿集(CD-ROM)   57th ROMBUNNO.17P-TS-9   Mar 2010
丸岡照登, 澤田圭司, 中村浩章, 斎木敏治, 井村考平, 岡本裕巳
応用物理学関係連合講演会講演予稿集(CD-ROM)   57th ROMBUNNO.18A-P4-24   Mar 2010
岡本裕巳, 井村考平
日本物理学会講演概要集   65(1) 938   Mar 2010
原田洋介, 井村考平, 岡本裕巳, 西島喜明, 上野貢生, 三澤弘明, 長瀬和也, 大西大
エクストリームフォトニクス研究 第11回 理研・分子研合同シンポジウム 平成22年   161-162   2010
原田洋介, 井村考平, 井村考平, 岡本裕巳, 西島喜明, 上野貢生, 三澤弘明, 長瀬和也, 大西大
分子科学討論会講演プログラム&amp;要旨(Web)   4th ROMBUNNO.4P061 (WEB ONLY)   2010
溝端秀聡, 井村考平, 井村考平, 岡本裕巳
分子科学討論会講演プログラム&amp;要旨(Web)   4th ROMBUNNO.4P065 (WEB ONLY)   2010
岡本裕巳, 井村考平
機能材料   29(11) 49-55   Oct 2009
Nakamura Hiroaki, Sawada Keiji, Maruoka Teruto, Imura Kohei, Saiki Toshiharu, Okamoto Hiromi
Meeting Abstracts of the Physical Society of Japan   65(0)    2010
岡本裕巳, 井村考平
応用物理学関係連合講演会講演予稿集   56th(0) 151   Mar 2009
岡本 裕巳, 井村 考平
Function & materials   29(11) 49-55   Nov 2009
井村考平, 岡本裕巳
SPMを用いたナノ分光/センシング技術 理研シンポジウム 講演予稿集 平成21年   8-9   2009
原田洋介, 井村考平, 岡本裕巳, 岡本裕巳
分子科学討論会講演プログラム&amp;要旨(Web)   3rd ROMBUNNO.4P083 (WEB ONLY)   2009
堀田裕康, 新谷理恵, 田中英一, 森田剛, 畠山義清, 西川恵子, 井村考平, 岡本裕巳, 沼尾茂悟, 西信之, 中野博文, 日野和之
分子科学討論会講演プログラム&amp;要旨(Web)   3rd ROMBUNNO.4P080 (WEB ONLY)   2009
井村考平, 井村考平, KIM Young Chae, KIM Seongyong, JEONG Dae Hong, 岡本裕巳
分子科学討論会講演プログラム&amp;要旨(Web)   3rd ROMBUNNO.4D06 (WEB ONLY)   2009
小林徹, 田中伸樹, 坂本章, 井村考平, 岡本裕巳
分子科学討論会講演プログラム&amp;要旨(Web)   3rd ROMBUNNO.4P081 (WEB ONLY)   2009
坂本章, 森和彦, 井村考平, 岡本裕巳
光化学討論会講演要旨集   2008 209   Sep 2008
井村考平, 岡本裕巳, 上野貢生, 三澤弘明
応用物理学関係連合講演会講演予稿集   55th(3) 1082   Mar 2008
島田透, 井村考平, 岡本裕巳, 北島正弘
日本化学会講演予稿集   88th(1) 30   Mar 2008
IMURA Kohei, OKAMOTO Hiromi
J. Surf. Sci. Soc. Jpn.   29(6) 336-343   Jun 2008
Scanning near-field optical microscopy facilitates the studies on optical properties of nanomaterials beyond the diffraction limit of light. It enables us to reveal the optical properties point by point on the nanomaterials. In this article, we re...
井村考平, KIM Si Il, KIM Sehum, 岡本裕巳
エクストリームフォトニクス研究 第7回理研・分子研合同シンポジウム 平成20年   113-114   2008
岡本裕巳, 井村考平, キム スイル, キム スイル, 上野貢生, 三澤弘明
分子科学討論会講演プログラム&amp;要旨(Web)   2nd ROMBUNNO.1B19 (WEB ONLY)   2008
井村考平, 岡本裕巳, 上野貢生, 三澤弘明
分子科学討論会講演プログラム&amp;要旨(Web)   2nd ROMBUNNO.1B18 (WEB ONLY)   2008
島田透, 井村考平, HOSSAIN M. K., 岡本裕巳, 北島正弘
応用物理学会学術講演会講演予稿集   68th(3) 1041   Sep 2007
井村考平, 岡本裕巳
分子科学討論会講演要旨集(CD-ROM)   1st 2B05   Aug 2007
井村考平, 岡本裕巳, KIM Young Chae, JEONG Dae Hong
応用物理学関係連合講演会講演予稿集   54th(3) 1102   Mar 2007
井村 考平
化学と工業 = Chemistry and chemical industry   60(3)    Mar 2007
Okamoto Hiromi, Imura Kohei
Meeting Abstracts of the Physical Society of Japan   62(0)    2007
Imura Kohei, Okamoto Hiromi
The Review of Laser Engineering   34(0) 16-17   2006
Kitajima Masahiro, Hossain Mohammad Kammal, Shimada Toru, Imura Kohei, Okamoto Hiromi
Abstract of annual meeting of the Surface Science of Japan   26(0) 161-161   2006
金ナノ粒子2次元単層構造における局在プラズモン励起に関する近接場分光
井村考平, 堀本訓子, 岡本裕巳
エクストリームフォトニクス研究-エクストリーム波長の発生と応用 第3回理研・分子研合同シンポジウム 平成18年   121-122   2006
OKAMOTO Hiromi, IMURA Kohei
The Review of laser engineering   34(3) 224-229   Mar 2006
井村考平, 永原哲彦, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2005 2A17   Sep 2005
堀本訓子, 井村考平, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2005 3P110   Sep 2005
OKAMOTO Hiromi, IMURA Kohei
rle   34(3) 224-229   2006
Optical properties of metal nanoparticles, especially gold nanorods in this review, are investigated by static and dynamic near-field microscopy and spectroscopy. We describe instrumentation for the dynamic near-field spectroscopy which enables le...
井村考平, 永原哲彦, 岡本裕巳
応用物理学関係連合講演会講演予稿集   52nd(3) 1166   Mar 2005
永原哲彦, 井村考平, 岡本裕巳, 小沢寛晃, 小川琢治
日本化学会講演予稿集   85th(1) 326   Mar 2005
永原哲彦, 井村考平, 岡本裕巳, 小黒あかね, 今堀博
日本化学会講演予稿集   85th(1) 326   Mar 2005
小黒あかね, 堀田弘樹, 梅山有和, 俣野善博, 今堀博, 荒木保幸, 伊藤攻, 永原哲彦, 井村考平
日本化学会講演予稿集   85th(2) 1297   Mar 2005
IMURA Kohei, NAGAHARA Tetsuhiko, OKAMOTO Hiromi
應用物理   74(4) 492-496   Apr 2005
井村考平
日本分光学会先端レーザー分光部会先端的レーザー分光の若手シンポジウム講演要旨集   2005 22-23   2005
井村考平, 永原哲彦, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2004 4P086   Sep 2004
永原哲彦, 井村考平, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2004 4P077   Sep 2004
井村考平, 永原哲彦, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2004 4C06   Sep 2004
永原哲彦, 井村考平, 岡本裕巳
日本化学会講演予稿集   84th(1) 71   Mar 2004
井村考平, 永原哲彦, 岡本裕巳
日本化学会講演予稿集   84th(1) 60   Mar 2004
永原哲彦, 井村考平, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2003 4AA04   Sep 2003
井村考平, 永原哲彦, 岡本裕巳
分子構造総合討論会講演要旨集(CD-ROM)   2003 4PA076   Sep 2003
永原哲彦, 井村考平, 岡本裕巳
ナノ学会大会講演予稿集   2003 189   May 2003
永原哲彦, 井村考平, 岡本裕巳
日本化学会講演予稿集   83rd(1) 414   Mar 2003
井村考平, 永原哲彦, 岡本裕巳
分子構造総合討論会講演要旨集   2002 405   Oct 2002
井村考平, 岸本直樹, 大野公一
化学反応討論会講演要旨集   18th 159   Jun 2002

Conference Activities & Talks

 
今枝佳祐, 長谷川誠樹, 井村考平
応用物理学会秋季学術講演会講演予稿集(CD-ROM)   5 Sep 2018   
上田慎二, 長谷川誠樹, 市川陽一, 上野貢生, 三澤弘明, 岡本裕巳, 井村考平
応用物理学会秋季学術講演会講演予稿集(CD-ROM)   5 Sep 2018   
長谷川花恵, 長谷川誠樹, 井村考平
応用物理学会秋季学術講演会講演予稿集(CD-ROM)   5 Sep 2018   
香村惟夫, 井村考平
応用物理学会春季学術講演会講演予稿集(CD-ROM)   5 Mar 2018   
今枝佳祐, 長谷川誠樹, 井村考平
応用物理学会春季学術講演会講演予稿集(CD-ROM)   5 Mar 2018   

Research Grants & Projects

 
Project Year: 2012 - 2013
Absorption spectroscopy is useful for molecular identifications, while its sensitivity is limited by intensity fluctuation of light source and noises of a detector. In order to improve the sensitivity, miniaturization of the illumination area down...
Project Year: 2010 - 2011
In this project, we proposed to excite plasmons by the electron injection and to visualize the plasmon wavefunctions by a scanning tunneling electron microscope. We developed the microscope based on the scanning near-field optical microscope. The ...
Project Year: 2007 - 2010
Optical fields can be confined and enhanced in a nanometric space by the use of metal nanostructures, which potentially create novel photochemical reaction fields and photoenergy conversion systems. As a basis toward achieving that, we visualized ...
Project Year: 2006 - 2009
Fundamental technologies were developed to achieve spectroscopic measurements with very high spatial resolution and time resolution at the same time. Studies were also done to obtain fundamental knowledge for exploring wave characteristics of exci...
Project Year: 2004 - 2005
Scanning near-field optical microscope enables optical measurements and observations with a spatial resolution far beyond the diffraction limit of light. This allows us to investigate spectroscopic characteristics with spatially resolving the posi...

Social Contribution

 
ミクスチャンネル(愛知県岡崎市)
[]  2006