(45) Surface
plasmon enhanced bright light emission from InGaN/GaN
K. Okamoto, I. Niki, A. Shvartser,
G. Maltezos, Y. Narukawa,
T. Mukai, Y. Kawakami, A. Scherer
Physica Status Solidi, Accepted 11/29/2006, in press
(44) Time-resolved photoluminescence
spectroscopy of surface-plasmon-enhanced light emission from conjugate polymers
T. D. Neal, K. Okamoto, A. Scherer, M. S.
Liu, A. K-Y Jen
Applied Physics Letters, Vol. 89, Art. No.
221106 (2006) PDF file
(165KB)
(43). Ultralow threshold on-chip toroidal
microcavity nanocrystal quantum dot lasers
B. Min, S. Kim, K. Okamoto, L. Yang, A.
Scherer, H. Atwater, K. Vahala
Applied Physics Letters, Vol. 89, Art. No.
191124 (2006) PDF file
(529KB)
(42) Diffusion of the Platinum ions and platinum nanoparticles during the photo-reduction processes using the transient grating method
M. Harada, K. Okamoto, M. Terazima
Langmuir, Vol. 22, No. 22, pp. 9142-9194 (2006) PDF file (278KB)
(41)
Surface plasmon enhanced bright emission from CdSe
quantum dots nanocrystal
K. Okamoto, S. Vyawahare, A. Scherer
Journal of the Optical Society of America B, Vol.
23, No. 8, pp. 1674-1678 (2006). PDF file (300KB)
(40).
Electrochemical conditions for the synthesis of Cu2O nanowires
in alumina template
E. Ko, J. Choi, K. Okamoto, Y. Taka, J. Lee
ChemPhysChem, Vol.
7, No. 7, pp. 1505-1509 (2006). PDF file
(232KB)
(39).
Near-field scanning optical microscopic transient lens for carrier dynamics
study in InGaN/GaN
K. Okamoto, A. Scherer, Y. Kawakami
Applied Physics Letters, Vol. 87, Art. No.
161104 (2005). PDF file (322KB)
---> highlighted at Editors’
Choice, Science Vol.310, p.591 (2005)
(38).
Confocal micro-photoluminescence of InGaN-based light emitting diodes
K. Okamoto, A. Kaneta, Y. Kawakami, S.
Fujita, J. Choi, M. Terazima, T. Mukai
Journal of Applied Physics, Vol. 98, Art.
No. 064503 (2005). PDF file
(720KB)
(37).
Molecular dynamics study of photochromic molecules
probed by the mask pattern transferred transient grating technique
K. Okamoto, T. D. Neal, Z. Zhang,
D. T. Wei, A. Scherer
Chemical
Physics Letters, Vol. 414, pp. 155-160 (2005). PDF file (218KB)
(36).
Surface plasmon enhanced spontaneous emission rate of InGaN/GaN
quantum wells probed by time-resolved photoluminescence spectroscopy
K. Okamoto, I. Niki, A. Scherer, Y. Narukawa, T. Mukai, Y. Kawakami
Applied Physics Letters, Vol. 87, Art. No. 071102
(2005). PDF file
(364KB)
(35). Surface
plasmon enhanced emission from dye doped polymer layers
T. D. Neal, K. Okamoto, A. Scherer
Optics Express, Vol. 13, No. 14, pp. 5522-5527
(2005). PDF file
(118KB)
---> highlighted at Laser
Focus World, September 2005, p. 36
(34).
Surface plasmon enhanced super bright InGaN light emitter
K. Okamoto, I. Niki, A. Shvartser, Y. Narukawa, T. Mukai, and A. Scherer
Physica Status Solidi (c), Vol. 2, No. 7,
pp. 2841-2844 (2005). PDF file
(104KB)
(33).
Mask pattern transferred transient grating technique for
molecular dynamics study in solutions
K. Okamoto, Z. Zhang, D. T. Wei,
and A. Scherer
Applied Physics Letters, Vol. 85, No. 21,
pp. 4842-4844 (2004). PDF file
(207KB)
(32).
Surface plasmon enhanced light-emitters based on InGaN quantum wells
K. Okamoto, I. Niki, A. Shvartser, Y. Narukawa, T.
Mukai, and A. Scherer
Nature
Materials, Vol. 3, No. 9, pp. 601–605 (2004). PDF file (372KB)
---> highlighted at Photonics
Spectra, December 2004, p. 105
(31).
Photothermal molecular sensing by using metal
thin-film nano grating for chemical and biomedical
applications
K. Okamoto, Z. Zhang, D. T. Wei, and A. Scherer
Thin Solid Films,
Vol. 469-470, pp. 420-424 (2004). PDF file (332KB)
(30). Submicron-scale photoluminescence of InGaN/GaN
probed by confocal scanning laser microscopy
K. Okamoto, J. Choi, Y. Kawakami, M. Terazima, T. Mukai,
and S. Fujita
Japanese Journal of Applied Physics, Vol. 43, No. 2, pp. 839-840
(2004).
PDF file (128KB)
(29). Photonic crystal nanolasers (I): Porous cavity
lasers
M.
Lončar, T. Yoshie, K. Okamoto, Y. Qiu, J. Vučković, A.
Scherer
IEICE
Transaction on Electronics, Vol. E87-C, No. 3, pp. 291-299 (2004). PDF
file (1430KB)
(28).
Sub-microscopic transient lens spectroscopy of InGaN/GaN quantum wells
K.
Okamoto, S. Fujita, Y.
Kawakami, A. Scherer
Physica
Status Solidi (b), Vol. 240, No. 2, pp. 368-371 (2003). PDF file (309KB)
(27).
Recombination dynamics
in low-dimensional nitride semiconductors
Y.
Kawakami, A. Kaneta, K Omae, A. Shikanai, K. Okamoto, G. Marutsuki, Y.
Narukawa, T. Mukai, S. Fujita
Physica Status Solidi (b), Vol. 240, No. 2, pp. 337-343 (2003). PDF file (460KB)
(26). Near-field scanning optical microscopy of
photonic crystal nanocavities
K. Okamoto, M. Lončar, T. Yoshie, A. Scherer, Y. Qui, P.
Gogna,
Applied
Physics Letters, Vol. 82, No. 10, pp. 1676-1678 (2003). PDF
file (328KB)
(25). Contribution of hydrogen bonding to the slow diffusion of
transient radicals
K. Okamoto, Y. Nogami, T. Tominaga, M. Terazima
Chemical Physics Letters, Vol. 372, pp.
419-422 (2003). PDF file (155KB)
(24). Photonic
crystal nanocavities for efficient light confinement and emission
A.
Scherer, T. Yoshie, M.
Lončar, J. Vučković, K. Okamoto, D. Deppe
Journal of the
Korean Physical Society, Vol
42, pp. S768-S773 (2003). PDF file
(585KB)
(23).
Nonradiative
recombination processes of carriers in InGaN/GaN probed by the microscopic
transient lens spectroscopy
K. Okamoto, K. Inoue, Y. Kawakami,
Sg. Fujita, M. Terazima, A. Tsujimura, I. Kidoguchi
Review of Scientific Instruments, Vol. 74, No. 1, pp. 575-577 (2003). PDF file (71.7KB)
(22).
Spatial and temporal luminescence dynamics in an InxGa1-xN
single quantum well probed by near field optical microscopy
A. Kaneta, K.
Okamoto, Y. Kawakami, Sg. Fujita, G. marutsuki, Y. Narukawa, T. Mukai
Applied Physics Letters, Vol. 81, No. 23,
pp. 4353-4355 (2002). PDF file (180KB)
(21).
Erratum: ‘‘Narrow luminescence lines from self-assembled CdSe
quantum dots at room temperature’’ [Appl. Phys. Lett. 78, 297 (2001)]
Z. H. Zheng, K.
Okamoto, H. C. Ko, Y. Kawakami, Sg.
Fujita
Applied Physics Letters, Vol. 78, No. 23,
p. 3749 (2002). PDF file
(10.4KB)
(20).
Microscopic patterning on the polysilane films by the laser induced grating
technique
K.
Okamoto, T. Tojo, H. Tada,
M. Terazima, K. Matsushige
Molecular
Crystal and Liquid Crystals, 370, pp370-382 (2001). PDF file (155KB)
(19).
Carrier dynamics in
InGaN/GaN SQW structure probed by the transient grating method with
subpicosecond pulsed laser
K.
Okamoto, A. Kaneta, K. Inoue, Y. Kawakami, M. Terazima,
T. Mukai, G. Shinomiya, Sg. Fujita
Physica Status Solidi B, Vol.
228, No. 1, pp. 81-84 (2001). PDF file
(143KB)
(18).
Spatial inhomogeneity
of photoluminescence in InGaN single quantum well structures
A.
Kaneta, G. Marutsuki, K. Okamoto, Y. Kawakami, Y. Nakagawa, G.
Shinomiya, T. Mukai, Sg. Fujita
Physica Status Solidi B, Vol.
228, No. 1, pp. 153-1564 (2001). PDF file
(249KB)
(17).
In inhomogeneity and
emission characteristics of InGaN
Y. Kawakami, K. Omae, A. Kaneta, K.
Okamoto, Y. Narukawa, T. Mukai, Sg. Fujita
Journal of Physics: Condensed
Matter, Vol. 13, pp. 6993-7010 (2001). PDF file
(863KB)
(16).
Spatial inhomogeneity of photoluminescence in an InGaN-based light-emitting
diode structure probed by near-field optical microscopy under
illumination-collection mode
A. Kaneta, T. Izumi, K. Okamoto, Y. Kawakami, Sg.
Fujita, Y. Narita, T. Inoue, T. Mukai
Japanese
Journal of Applied Physics, Vol. 40 pp. 110-111 (2001) PDF file
(41.1KB)
(15).
Radiative and
nonradiative recombination processes in GaN-based semiconductors
Y. Kawakami, K. Omae, A. Kaneta, K.
Okamoto, T. Izumi, S. Saijo, K. Inoue, Y. Narukawa, S. Nakamura, Sg. Fujita
Physica Status Solidi
(a), Vol. 183, pp. 41-50 (2001) PDF file
(208KB)
(14).
Translational diffusion of ion radicals created by electron transfer in charged
micellar solutions probed by the transient grating method and the Taylor
dispersion method
K.
Okamoto, N. Hirota, M. Terazima, T. Tominaga,
The Journal of Physical Chemistry A, Vol.105, No.27, pp. 6586-6593
(2001). PDF file
(107KB)
(13).
Photothermal processes of wide-bandgap
semiconductors probed by the transient grating method
K.
Okamoto, Y. Kawakami , Shigeo Fujita, M. Terazima
Analytical
Science, Vol. 17, pp. s312-s314 (2001). PDF file
(421KB)
(12).
Time-space resolved photoluminescence from (Zn,Cd)Se -based quantum dots
structures
K. Okamoto, H.-C. Ko,
Y. Kawakami, Sg. Fujita
Journal
of Crystal Growth, 214/215, pp. 639-645 (2000).
PDF file
(502KB)
(11).
Time-reserved photoluminescence spectroscopy in GaN-based semiconductors with
micron special
T.
Izumi, Y. Narukawa, K. Okamoto, Y. Kawakami , Shigeo Fujita, S. Nakamura
Journal
of Luminescence, 87-89, pp. 1196-1198 (2000). PDF file (424KB)
(10).
Diffusion of photochemically generated intermediate radicals in water-ethanol
mixed solvents
K.Okamoto, N. Hirota,
M. Terazima
The
Journal of Physical Chemistry A, Vol.102, No.19 pp. 3447-3454 (1998). PDF file
(104KB)
(9).
Diffusion of electrically neutral radicals and anion radicals created by
photochemical reaction
K. Okamoto, N. Hirota,
M. Terazima
The
Journal of Chemical Society Faraday Transaction, Vol.94, No.1 pp. 185-194
(1998). PDF file
(337KB)
(8).
Diffusion process of the benzyl radical created by photodissociated probed by
the transient grating method
K. Okamoto, N. Hirota,
M. Terazima
The
Journal of Physical Chemistry A, Vol.101, No.29, pp. 5269-5277 (1997). PDF file
(306KB)
(7).
Comment on "Diffusion of free radicals in solution. TEMPO,
diphenylpicrylhydrazyl, and nitrosodisulfonate"
K.
Okamoto, N.
Hirota, M. Terazima
The Journal of Physical Chemistry A, Vol.101, No.29, pp. 5380-5381
(1997). PDF file
(52.8KB)
(6).
Temperature dependence of diffusion of radical intermediates probed by the
transient
grating method
K.
Okamoto, M.
Terazima, N. Hirota
The
Jounal of Chemical Physics, Vol.103, No.24, pp. 10445-10452 (1995). PDF file
(169KB)
(5).
Translational diffusion of transient radicals created by the photoinduced
hydrogen abstraction reaction in solution: Anomalous size dependence in the
radical diffusion
M. Terazima, K.
Okamoto, N. Hirota
The Jounal of Chemical Physics, Vol.102, No.6, pp. 2506-2515
(1995). PDF file
(249KB)
(4).
Translational diffusion of transient radicals studied by the transient grating
method
M. Terazima, K.
Okamoto, N. Hirota
Journal
of Molecular Liquids, Vol.65/66, pp. 401-404 (1995) PDF file (732KB)
(3).
Molecular dynamics in solution probed by the transient grating method with a
nanosecond pulsed Laser
M. Terazima, K.
Okamoto, N. Hirota
Laser Chemistry,
Vol.13, pp. 169-185 (1994) PDF file (3130KB)
(2).
Transient radical diffusion in photoinduced hydrogen abstraction reaction of
benzophenone probed by transient grating method
M. Terazima, K.
Okamoto, N. Hirota
The
Journal of Physical Chemistry, Vol.97, No.50 pp. 13387-13393 (1993). PDF file (878KB)
(1). Diffusion process of methyl red in organic solvents studied by
the transient grating method
M. Terazima, K.
Okamoto, N. Hirota
The
Journal of Physical Chemistry, Vol.97, No.19 pp. 5188-5192 (1993). PDF file (543KB)
Proceedings
(13). Surface plasmon enhanced
InGaN light emitter
K.
Okamoto, I. Niki, A. Shvartser,
G. Maltezos, Y. Narukawa,
T. Mukai, K. Nishizuka, Y.
Kawakami, A. Scherer
Proceedongs of SPIE, vol 5733,
pp94-103 (2005). PDF file (489KB)
(12). Photonic
crystal nanocavities with quantum well or quantum dot
active material
T.
Yoshie, M. Loncar, K.
Okamoto, Y. Qiu; O. B. Shchekin,,
H. Chen, D. G. Deppe, A. Scherer
Proceedongs of SPIE, vol 5360,
pp16-23 (2004).
(11). Light concentration in photonic
crystal and plasmon optical cavities
A. Scherer, M. Loncar,
K. Okamoto, T. Yoshie, M. Adams, J. Witzens
Lasers and Electro-Optics Society, 2004. LEOS 2004. Vol. 2, pp.
815- 816 (2004) PDF file
(717KB)
(10). Photonic bandgap
microcavities and waveguides
A. Scherer, M. Loncar,,
T. Yoshie, K. Okamoto, B. Maune, J. Witzens
SOI Conference, 2003. IEEE
International, pp. 9- 11
(2003) PDF file
(257KB)
(9). Photonic bandgap
microcavity devices
A. Scherer, M. Loncar,,
T. Yoshie, K. Okamoto
Nanotechnology, 2003. IEEE-NANO 2003. Vol. 1 pp. 275- 276 (2003) PDF file (206KB)
(8). 2-D photonic crystal microcavities
A. Scherer, T. Yoshie, M. Loncar,, J. Vuckovic, D. Deppe, K. Okamoto
2003 Digest of the LEOS Summer Topical Meetings. Page TuA3.1/47 (2003) PDF file (108KB)
(7). Recombination mechanism in low-dimensional nitride semiconductors
Y.
Kawakami, A. Kaneta, K. Okamoto, T. Inoue, F. Satou, Y. Narita, F. Henneberger,
G. Marutsuki, Y. Narukawa, T. Mukai, S. Fujita
Proceedongs of SPIE,
vol 4986, pp575-588 (2003).
(6).
Direct observation of the nonradiative recombination
processes in InGaN-based LEDs probed by the third-order nonlinear spectroscopy
K. Okamoto, S. Saijo, Y. Kawakami, Sg. Fujita, M. Terazima, T. Mukai, G.
Shinomiya, S. Nakamura
Proceedongs of SPIE, vol 4278, pp150-157 (2001). PDF file (477KB)
(5). Dynamics of spontaneous and stimulated
emission in GaN-based semiconductors
Y. Kawakami, K. Omae, A. Kaneta, K.
Okamoto, T. Izumi, S. Saijo, K. Inoue, Y. Narukawa, T. Mukai, Sg. Fujita
Proceedongs of SPIE, vol 4280, pp45-52 (2001). PDF file (993KB)
(4). Time-resolved fluorescence spectroscopy of
dopamine in the single cells
M. Mabuchi, J. Shimada, K. Okamoto, Y.
Kawakami, Sg. Fujita, K. Matsushige,
Proceedongs of SPIE,
vol 4252, pp140-147 (2001). PDF
file (222KB)
(3).
Nonradiative recombination processes in GaN-based semiconductors probed by the
transient grating method.
K.
Okamoto, Y. Kawakami, Sg. Fujita, M. Terazima, S. Nakamura,
Proc.
Int. Workshop on Nitride Semiconductors, IPAP Conf. Series 1 pp. 540-543 (2000). PDF file (312KB)
(2). Recombination dynamics in GaN and InGaN/GaN
multiple quantum wells on air-bridged lateral epitaxial grown GaN layers
T. Izumi, K. Inoue, Y.
Narukawa, K. Okamoto, Y. Kawakami, Sg. Fujita, A. Tsujimura, I.
Kidoguchi, Y. Ban
Proc.
Int. Workshop on Nitride Semiconductors, IPAP Conf. Series 1 pp. 599-602
(2000). PDF file (316KB)
(1). Postdoctoral scholars should do research
with free style - In case of Kyoto University-Venture
Business Laboratory -
ポストドク研究員だからこそできる自由な研究 -京都大学ベンチャービジネスラボラトリーにて-
岡本晃一 (Koichi
Okamoto)
化学と工業 (Kagaku
to Kogyo), Vol. 53, No. 7, pp. 798-800(2000)PDF
file (794KB)
(42).
(Invited) Surface plasmon enhanced light emission