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Research Output 1990 2019

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17 Citations (Scopus)

Absolute orientation of pendant chromophores attached to the polymer backbone in monolayers at interfaces studied by phase measurement of second-harmonic generation

Kajikawa, K., Yamada, T., Yokoyama, S., Okada, S., Matsuda, H., Nakanishi, H., Kakimoto, M. A., Imai, Y., Takezoe, H. & Fukuda, A., Jan 24 1996, In : Langmuir. 12, 2, p. 580-583 4 p.

Research output: Contribution to journalArticle

Phase measurement
Chromophores
Harmonic generation
chromophores
Monolayers

Adamantyl and carbazole containing trans-poly(norbornene-dicarboximide)s as electro-optic chromophore hosts

Spring, A. M., Qiu, F., Hong, J., Bannaron, A., Cheng, X. & Yokoyama, S., May 20 2019, In : polymer. 172, p. 382-390 9 p.

Research output: Contribution to journalArticle

Chromophores
Electrooptical effects
Copolymers
Polymers
Monomers
16 Citations (Scopus)

Adsorption-induced conformational changes of porphyrin derivatives and formation of twin superstructures on a copper surface

Sekiguchi, T., Wakayama, Y., Yokoyama, S., Kamikado, T. & Mashiko, S., Oct 1 2004, In : Thin Solid Films. 464-465, p. 393-397 5 p.

Research output: Contribution to journalArticle

Porphyrins
Scanning tunneling microscopy
porphyrins
scanning tunneling microscopy
Copper

A high efficiency silicon nitride waveguide grating coupler with a multilayer bottom reflector

Hong, J., Spring, A. M., Qiu, F. & Yokoyama, S., Dec 1 2019, In : Scientific reports. 9, 1, 12988.

Research output: Contribution to journalArticle

Open Access
Optics and Photonics
Silicon Dioxide
silicon nitride
5 Citations (Scopus)

A high-speed electro-optic triple-microring resonator modulator

Hong, J., Qiu, F., Cheng, X., Spring, A. M. & Yokoyama, S., Dec 1 2017, In : Scientific reports. 7, 1, 4682.

Research output: Contribution to journalArticle

Optics and Photonics
22 Citations (Scopus)

A hybrid electro-optic polymer and TiO2 double-slot waveguide modulator

Qiu, F., Spring, A. M., Maeda, D., Ozawa, M. A., Odoi, K., Otomo, A., Aoki, I. & Yokoyama, S., Feb 24 2015, In : Scientific reports. 5, 8561.

Research output: Contribution to journalArticle

slots
electro-optics
modulators
waveguides
polymers
13 Citations (Scopus)

Amplified spontaneous emission and laser emission from a high optical-gain medium of dye-doped dendrimer

Yokoyama, S., Nakahama, T. & Mashiko, S., Jan 1 2005, In : Journal of Luminescence. 111, 4 SPEC. ISS., p. 285-290 6 p.

Research output: Contribution to journalArticle

Dendrimers
Optical gain
Spontaneous emission
dendrimers
spontaneous emission

Analysis of a molecular beam produced by the spray-jet technique with femtosecond laser mass spectroscopy

Yamada, T., Shinohara, H., Mashiko, S. & Yokoyama, S., Aug 20 2007, In : Molecular Crystals and Liquid Crystals. 472, 1, p. 171-179 9 p.

Research output: Contribution to journalArticle

Molecular beams
Ultrashort pulses
laser spectroscopy
molecular beams
sprayers
6 Citations (Scopus)
Polymers
Molecular weight
Inductively coupled plasma mass spectrometry
Catalysts
Ruthenium
7 Citations (Scopus)

An electro-optic polymer-cladded TiO2 waveguide modulator

Qiu, F., Miura, H., Spring, A. M., Hong, J., Maeda, D., Ozawa, M. A., Odoi, K. & Yokoyama, S., Oct 24 2016, In : Applied Physics Letters. 109, 17, 173301.

Research output: Contribution to journalArticle

electro-optics
modulators
waveguides
polymers
titanium oxides
18 Citations (Scopus)

An enhanced host-guest electro-optical polymer system using poly(norbornene-dicarboximides) via ROMP

Yu, F., Spring, A. M., Li, L., Qiu, F., Yamamoto, K., Maeda, D., Ozawa, M., Odoi, K. & Yokoyama, S., Feb 18 2013, In : Journal of Polymer Science, Part A: Polymer Chemistry. 51, 6, p. 1278-1284 7 p.

Research output: Contribution to journalArticle

Polymers
Chromophores
Electrooptical effects
Molecular weight
Thiophenes
10 Citations (Scopus)

A norbornene polymer brush for electro-optic applications

Jia, Y., Spring, A. M., Yu, F., Yamamoto, K., Aoki, I., Otomo, A. & Yokoyama, S., Mar 3 2014, In : Thin Solid Films. 554, p. 175-179 5 p.

Research output: Contribution to journalArticle

brushes
Brushes
Chromophores
Electrooptical effects
chromophores
15 Citations (Scopus)
Hamiltonians
examination
Vibrational spectra
Angular momentum
harmonics
11 Citations (Scopus)

A straightforward electro-optic polymer covered titanium dioxide strip line modulator with a low driving voltage

Qiu, F., Spring, A. M., Maeda, D., Ozawa, M. A., Odoi, K., Aoki, I., Otomo, A. & Yokoyama, S., Aug 18 2014, In : Applied Physics Letters. 105, 7, 073305.

Research output: Contribution to journalArticle

titanium oxides
low voltage
electro-optics
modulators
strip
12 Citations (Scopus)

Athermal and high-Q hybrid TiO2-Si3N4 ring resonator via an etching-free fabrication technique

Qiu, F., Spring, A. M. & Yokoyama, S., Mar 18 2015, In : ACS Photonics. 2, 3, p. 405-409 5 p.

Research output: Contribution to journalArticle

Q factors
Resonators
Etching
Waveguides
resonators
11 Citations (Scopus)

Athermal Hybrid Silicon/Polymer Ring Resonator Electro-optic Modulator

Qiu, F., Spring, A. M., Miura, H., Maeda, D., Ozawa, M. A., Odoi, K. & Yokoyama, S., May 18 2016, In : ACS Photonics. 3, 5, p. 780-783 4 p.

Research output: Contribution to journalArticle

silicon polymers
Silicon
Electrooptical effects
Modulators
electro-optics
18 Citations (Scopus)

Athermal silicon nitride ring resonator by photobleaching of Disperse Red 1-doped poly(methyl methacrylate) polymer

Qiu, F., Yu, F., Spring, A. M. & Yokoyama, S., Oct 1 2012, In : Optics Letters. 37, 19, p. 4086-4088 3 p.

Research output: Contribution to journalArticle

polymethyl methacrylate
silicon nitrides
resonators
rings
polymers
43 Citations (Scopus)

Azimuthal Photoregulation of a Liquid Crystal with an Azobenzene-Modified Polyimide Langmuir-Blodgett Monolayer

Akiyama, H., Kudo, K., Ichimura, K., Yokoyama, S., Kakimoto, M. A. & Imai, Y., Mar 1 1995, In : Langmuir. 11, 3, p. 1033-1037 5 p.

Research output: Contribution to journalArticle

Liquid Crystals
Azobenzene
polyimides
Polyimides
Liquid crystals

Camera sensor platform for high speed video data transmission using a wideband electro-optic polymer modulator

Cheng, X., Qiu, F., Spring, A. M., Sasaki, M., Kashino, T., Ozawa, M., Nawata, H., Kita, T., Sugihara, O. & Yokoyama, S., Feb 4 2019, In : Optics Express. 27, 3, p. 1877-1883 7 p.

Research output: Contribution to journalArticle

video data
data transmission
electro-optics
modulators
platforms
31 Citations (Scopus)
silicon nitrides
titanium oxides
CMOS
resonators
rings
4 Citations (Scopus)

Computational and experimental studies of azobenzene dendrons for non-linear optical applications

Yokoyama, S., Mashiko, S., Yamaguchi, Y. & Yokomichi, Y., Aug 1 2000, In : Polymers for Advanced Technologies. 11, 8-12, p. 692-697 6 p.

Research output: Contribution to journalArticle

Dendrimers
Azobenzene
Chromophores
Molecular dynamics
Harmonic generation
81 Citations (Scopus)

Conformation selective assembly of carboxyphenyl substituted porphyrins on Au (111)

Yokoyama, T., Kamikado, T., Yokoyama, S. & Mashiko, S., Dec 15 2004, In : Journal of Chemical Physics. 121, 23, p. 11993-11997 5 p., 5.

Research output: Contribution to journalArticle

Porphyrins
porphyrins
Conformations
Hydrogen
assembly
4 Citations (Scopus)

Correlations between antibunching and blinking of photoluminescence from a single CdSe quantum dot

Xu, X. S., Yamada, T. & Yokoyama, S., Dec 1 2009, In : European Physical Journal D. 55, 3, p. 691-697 7 p.

Research output: Contribution to journalArticle

blinking
nanocrystals
quantum dots
photoluminescence
excitation
3 Citations (Scopus)

Crosslinked poly(norbornene-dicarboximide)s as electro-optic chromophore hosts

Spring, A. M., Qiu, F., Hong, J., Bannaron, A., Kashino, T., Kikuchi, T., Ozawa, M., Nawata, H., Odoi, K. & Yokoyama, S., Dec 1 2017, In : European Polymer Journal. 97, p. 263-271 9 p.

Research output: Contribution to journalArticle

Chromophores
Electrooptical effects
chromophores
electro-optics
Polymers
13 Citations (Scopus)

Current-voltage characteristics with a step structure of metal/polyirnide/rhodamine-dendrirner/polyimide/ metal junction

Noguchü, Y., Majima, Y., Iwamoto, M., Kubota, T., Yokoyama, S., Nakahama, T. & Mashiko, S., Jan 1 2000, In : IEICE Transactions on Electronics. E83-C, 7, p. 1076-1080 5 p.

Research output: Contribution to journalArticle

Rhodamines
Current voltage characteristics
Polyimides
Metals
Coulomb blockade
3 Citations (Scopus)

Demonstration of long-term thermally stable silicon-organic hybrid modulators at 85 °C

Kieninger, C., Kutuvantavida, Y., Miura, H., Kemal, J. N., Zwickel, H., Qiu, F., Lauermann, M., Freude, W., Randel, S., Yokoyama, S. & Koos, C., Oct 15 2018, In : Optics Express. 26, 21, p. 27955-27964 10 p.

Research output: Contribution to journalArticle

burn-in
modulators
electro-optics
silicon
glass transition temperature

Dendrimer for Molecular Photonics Application

Yokoyama, S., Jan 1 2003, In : kobunshi. 52, 10, p. 758-762 5 p.

Research output: Contribution to journalArticle

Dendrimers
Photonics
3 Citations (Scopus)

Determining the conformation of a phenylene-linked porphyrin dimer by NMR spectroscopy and quantum chemical calculations

Okuno, Y., Kamikado, T., Yokoyama, S. & Mashiko, S., Aug 1 2003, In : Journal of Molecular Structure: THEOCHEM. 631, 1-3, p. 13-20 8 p.

Research output: Contribution to journalArticle

Porphyrins
porphyrins
Dimers
Nuclear magnetic resonance spectroscopy
Conformations
7 Citations (Scopus)

Development of an electric field sensor based on second harmonic generation with electro-optic materials

Vasa, N. J., Kawata, Y., Tanaka, R. & Yokoyama, S., Apr 30 2007, In : Journal of Materials Processing Technology. 185, 1-3, p. 173-177 5 p.

Research output: Contribution to journalArticle

Electrooptical effects
Harmonic generation
Electric field measurement
Electric fields
Sensors
8 Citations (Scopus)

Direct determination of photonic band structure for waveguiding modes in two-dimensional photonic crystals

Inoue, S. I., Yokoyama, S. & Aoyagi, Y., Feb 18 2008, In : Optics Express. 16, 4, p. 2461-2468 8 p.

Research output: Contribution to journalArticle

photonics
prisms
crystals
evanescent waves
photons
3 Citations (Scopus)

Displacement current generation across single monolayers of polyamic acids having pendant groups at the air-water interface

Naruse, H., Iwamoto, M., Yokoyama, S., Kakimoto, M. A. & Imai, Y., Apr 15 1994, In : Thin Solid Films. 242, 1-2, p. 220-222 3 p.

Research output: Contribution to journalArticle

Monolayers
surface water
acids
Acids
Water
41 Citations (Scopus)

Effect of modified donor units on molecular hyperpolarizability of thienyl-vinylene nonlinear optical chromophores

Zhang, X., Aoki, I., Piao, X., Inoue, S., Tazawa, H., Yokoyama, S. & Otomo, A., Nov 10 2010, In : Tetrahedron Letters. 51, 45, p. 5873-5876 4 p.

Research output: Contribution to journalArticle

Benchmarking
Chromophores
Thiophenes
Temperature
Electrooptical effects
6 Citations (Scopus)

Efficiently poled electro-optic polymer modulators

Qiu, F. & Yokoyama, S., Aug 22 2016, In : Optics Express. 24, 17, p. 19020-19025 6 p.

Research output: Contribution to journalArticle

electro-optics
modulators
polymers
waveguides
stability tests
157 Citations (Scopus)

Electrical control of the structure and lasing in chiral photonic band-gap liquid crystals

Furumi, S., Yokoyama, S., Otomo, A. & Mashiko, S., Jan 6 2003, In : Applied Physics Letters. 82, 1, p. 16-18 3 p.

Research output: Contribution to journalArticle

lasing
liquid crystals
photonics
photoexcitation
doped crystals
2 Citations (Scopus)

Electrical response of the supramolecular helical structure and laser action in chiral photonic bandgap liquid crystals

Furumi, S., Yokoyama, S., Otomo, A. & Mashiko, S., Oct 2003, In : KOBUNSHI RONBUNSHU. 60, 10, p. 555-560 6 p.

Research output: Contribution to journalArticle

Cholesteric liquid crystals
Liquid Crystals
Liquid crystals
Photonics
Energy gap
11 Citations (Scopus)

Electro-optic polymer/titanium dioxide hybrid core ring resonator modulators

Qiu, F., Spring, A. M., Yu, F., Aoki, I., Otomo, A. & Yokoyama, S., Nov 1 2013, In : Laser and Photonics Reviews. 7, 6

Research output: Contribution to journalArticle

Electrooptical effects
titanium oxides
Titanium dioxide
Modulators
electro-optics
6 Citations (Scopus)

Electro-optic properties of a bi-chromophore norbornene polymer brush system

Jia, Y., Spring, A. M., Qiu, F., Yu, F., Yamamoto, K., Aoki, I., Otomo, A. & Yokoyama, S., Feb 10 2014, In : Japanese journal of applied physics. 53, 1 PART 2, 01AF04.

Research output: Contribution to journalArticle

Azobenzene
brushes
Brushes
Chromophores
Electrooptical effects
4 Citations (Scopus)

Electro-optic properties of a side chain poly(norbornene-dicarboximide) system with an appended phenyl vinylene thiophene chromophore

Spring, A. M., Qiu, F., Hong, J., Bannaron, A. & Yokoyama, S., Jun 16 2017, In : Polymer. 119, p. 13-27 15 p.

Research output: Contribution to journalArticle

Thiophenes
Thiophene
Chromophores
Electrooptical effects
Polymers

Enhanced electro-optic response of a poled polymer in a reflective microcavity

Inoue, A., Inoue, S. I. & Yokoyama, S., Jul 15 2010, In : Optics Communications. 283, 14, p. 2935-2938 4 p.

Research output: Contribution to journalArticle

Microcavities
Electrooptical effects
electro-optics
Polymers
spacers
34 Citations (Scopus)

Enhancement of electro-optic activity by introduction of a benzyloxy group to conventional donor-π-acceptor molecules

Piao, X., Zhang, X., Inoue, S., Yokoyama, S., Aoki, I., Miki, H., Otomo, A. & Tazawa, H., Jan 1 2011, In : Organic Electronics. 12, 6, p. 1093-1097 5 p.

Research output: Contribution to journalArticle

Electrooptical effects
electro-optics
Molecules
augmentation
Chromophores
13 Citations (Scopus)
photonics
waveguides
fluorescence
augmentation
polymers
10 Citations (Scopus)

Estimation of organic molecular film structures using surface-plasmon resonance spectroscopy

Zhou, M., Otomo, A., Yokoyama, S. & Mashiko, S., Aug 1 2001, In : Thin Solid Films. 393, 1-2, p. 114-118 5 p.

Research output: Contribution to journalArticle

Surface plasmon resonance
surface plasmon resonance
Spectroscopy
Substrates
spectroscopy

Fabrication and characterization of nanometer-size structures consisting of organic molecules

Suzuki, H., Terui, T., Tanaka, S., Miki, H., Kamikado, T., Yokoyama, T., Okuno, Y., Yokoyama, S. & Mashiko, S., Sep 1 2004, In : Journal of the National Institute of Information and Communications Technology. 51, 3-4, p. 119-127 9 p.

Research output: Contribution to journalArticle

Fabrication
Molecules
Microscopes
Scanning
Binding sites
5 Citations (Scopus)

Fabrication of a high-Q factor ring resonator using LSCVD deposited Si3N4 film

Cheng, X., Hong, J., Spring, A. M. & Yokoyama, S., Jun 2 2017, In : Optical Materials Express. 7, 7, p. 2182-2187 6 p.

Research output: Contribution to journalArticle

Photonics
Resonators
Chemical vapor deposition
Fabrication
Optical losses
11 Citations (Scopus)
Langmuir Blodgett films
Langmuir-Blodgett films
Macromolecules
macromolecules
Dendrimers
22 Citations (Scopus)

Further investigation of the preparation process of poly(p-phenylenevinylene) Langmuir-Blodgett films

Wu, A., Yokoyama, S., Watanabe, S., Kakimoto, M. A., Imai, Y., Araki, T. & Iriyama, K., May 15 1994, In : Thin Solid Films. 244, 1-2, p. 750-753 4 p.

Research output: Contribution to journalArticle

Langmuir Blodgett films
Langmuir-Blodgett films
Heat treatment
preparation
Sulfides
7 Citations (Scopus)

Glass transition temperature control by poly(norbornene-dicarboximide) copolymers

Spring, A. M., Maeda, D., Ozawa, M., Odoi, K., Qiu, F., Yamamoto, K. & Yokoyama, S., Jan 1 2015, In : Polymer Bulletin. 72, 3, p. 503-521 19 p.

Research output: Contribution to journalArticle

temperature control
Temperature control
glass transition temperature
copolymers
Copolymers
1 Citation (Scopus)
Electro-optic Modulator
Surface Plasmon Polariton
Finite-difference Time-domain Method
Plasmon
Electro-optics
5 Citations (Scopus)
Thiophenes
Thiophene
Chromophores
Electrooptical effects
thiophenes
18 Citations (Scopus)

High thermal stability 40 GHz electro-optic polymer modulators

Miura, H., Qiu, F., Spring, A. M., Kashino, T., Kikuchi, T., Ozawa, M., Nawata, H., Odoi, K. & Yokoyama, S., Nov 13 2017, In : Optics Express. 25, 23, p. 28643-28649 7 p.

Research output: Contribution to journalArticle

electro-optics
modulators
thermal stability
polymers
frequency response