Shiyoshi Yokoyama

2011

3 Citations (Scopus)

Multimode interference waveguide switch of electro-optic polymer with tapered access waveguides

Yu, F., Yamamoto, K., Piao, X. & Yokoyama, S., Jan 1 2011, In : Physics Procedia. 14, p. 25-28 4 p.

Research output: Contribution to journal › Conference article

electro-optics

switches

waveguides

interference

polymers

2009

Reflective planar microcavity with enhanced electro-optic activity of a poled polymer

Inoeu, A., Inoue, S. & Yokoyama, S., Dec 1 2009, In : Proceedings of SPIE - The International Society for Optical Engineering. 7631, 763129.

Research output: Contribution to journal › Conference article

Microcavity

Electro-optics

Microcavities

Electrooptical effects

electro-optics

2006

6 Citations (Scopus)

Control of multiphoton process within diffraction limit space in polymer microstructures

Nakahama, T., Yokoyama, S., Miki, H. & Mashiko, S., Mar 21 2006, In : Thin Solid Films. 499, 1-2, p. 406-409 4 p.

Research output: Contribution to journal › Conference article

Multiphoton processes

Optical recording

Polymers

Photons

Diffraction

20 Citations (Scopus)

Control of photonic bandgaps in chiral liquid crystals for distributed feedback effect

Furumi, S., Yokoyama, S., Otomo, A. & Mashiko, S., Mar 21 2006, In : Thin Solid Films. 499, 1-2, p. 322-328 7 p.

Research output: Contribution to journal › Conference article

Liquid Crystals

Liquid crystals

Photonics

Energy gap

liquid crystals

14 Citations (Scopus)

Control of single supramolecular chain of porphyrin on a copper surface

Kamikado, T., Sekiguchi, T., Yokoyama, S., Wakayama, Y. & Mashiko, S., Mar 21 2006, In : Thin Solid Films. 499, 1-2, p. 329-332 4 p.

Research output: Contribution to journal › Conference article

Porphyrins

porphyrins

Copper

copper

Coordination Complexes

9 Citations (Scopus)

Structures of thin films of tertiary-phenyl-porphyrin derivatives on gold surface

Terui, T., Yokoyama, S., Suzuki, H., Mashiko, S., Sakurai, M. & Moriwaki, T., Mar 21 2006, In : Thin Solid Films. 499, 1-2, p. 157-160 4 p.

Research output: Contribution to journal › Conference article

Porphyrins

porphyrins

Gold

gold

Derivatives

2 Citations (Scopus)

Synthesis and luminescence properties of benzylthioether dendrons bearing Rhodamine B at the focal point

Miki, H., Otomo, A., Yokoyama, S. & Mashiko, S., Mar 21 2006, In : Thin Solid Films. 499, 1-2, p. 333-337 5 p.

Research output: Contribution to journal › Conference article

rhodamine B

Bearings (structural)

Dendrimers

rhodamine

Luminescence

2005

Nanoimprint technology for application to photonic devices

Nakao, M., Yokoyama, S. & Masuda, H., Dec 1 2005, In : Proceedings of SPIE - The International Society for Optical Engineering. 6050, 605001.

Research output: Contribution to journal › Conference article

Nanoimprint

Photonic devices

Photonics

photonics

dye lasers

Photonic crystal templates for organic solid-state laser

Yokoyama, S., Nakahama, T., Mashiko, S., Nakao, M., Yamada, M., Niship, K. & Masuda, H., Dec 1 2005, In : Proceedings of SPIE - The International Society for Optical Engineering. 5926, p. 1-8 8 p., 59260Q.

Research output: Contribution to journal › Conference article

organic lasers

organic solids

Solid-state Laser

Solid state lasers

solid state lasers

Polymer based sub-micrometer device for optical applications

Yokoyama, S., Nakahama, T., Mashiko, S., Nakao, M., Nishio, K. & Masuda, H., Dec 1 2005, In : Proceedings of SPIE - The International Society for Optical Engineering. 6050, 60500N.

Research output: Contribution to journal › Conference article

Dendrimers

Dye lasers

Microcavities

dendrimers

dye lasers

1 Citation (Scopus)

Two-photon-induced polymerization in a laser gain medium for optical microstructure

Yokoyama, S., Nakahama, T., Miki, H. & Mashiko, S., Dec 1 2005, In : Proceedings of SPIE - The International Society for Optical Engineering. 5934, p. 1-8 8 p., 593403.

Research output: Contribution to journal › Conference article

Dye lasers

Microcavities

Polymerization

dye lasers

Dendrimers

2003

11 Citations (Scopus)

Effective photocrosslinking reaction of dendrimers through triplet energy transfer

Furumi, S., Otomo, A., Yokoyama, S. & Mashiko, S., Aug 22 2003, In : Thin Solid Films. 438-439, p. 85-89 5 p.

Research output: Contribution to journal › Conference article

Dendrimers

dendrimers

Cinnamates

Energy transfer

energy transfer

20 Citations (Scopus)

Fabrication of three-dimensional microstructure in optical-gain medium using two-photon-induced photopolymerization technique

Yokoyama, S., Nakahama, T., Miki, H. & Mashiko, S., Aug 22 2003, In : Thin Solid Films. 438-439, p. 452-456 5 p.

Research output: Contribution to journal › Conference article

Optical gain

Dye lasers

Microcavities

Photopolymerization

dye lasers

10 Citations (Scopus)

Segregation of molecular overlayers with different structures on a metal surface

Suzuki, H., Miki, H., Yokoyama, S. & Mashiko, S., Aug 22 2003, In : Thin Solid Films. 438-439, p. 97-100 4 p.

Research output: Contribution to journal › Conference article

metal surfaces

Metals

Boron

Molecules

boron

9 Citations (Scopus)

Study on laser action from UV-curable chiral nematic liquid crystals

Furumi, S., Yokoyama, S., Otomo, A. & Mashiko, S., Aug 22 2003, In : Thin Solid Films. 438-439, p. 423-427 5 p.

Research output: Contribution to journal › Conference article

Nematic liquid crystals

liquid crystals

Lasers

Photopolymerization

lasers

21 Citations (Scopus)

Tunneling electron induced luminescence from monolayered Cu-TBP porphyrin molecules adsorbed on Cu(1 0 0)

Dong, Z. C., Kar, A., Dorozhkin, P., Amemiya, K., Uchihashi, T., Yokoyama, S., Kamikado, T., Mashiko, S. & Okamoto, T., Aug 22 2003, In : Thin Solid Films. 438-439, p. 262-267 6 p.

Research output: Contribution to journal › Conference article

Electron tunneling

Porphyrins

electron tunneling

porphyrins

Luminescence

20 Citations (Scopus)

Tunneling electron induced photon emission from monolayered H₂TBP porphyrin molecules on Cu( 1 0 0 )

Dong, Z. C., Trifonov, A. S., Guo, X. L., Amemiya, K., Yokoyama, S., Kamikado, T., Yamada, T., Mashiko, S. & Okamoto, T., Jun 10 2003, In : Surface Science. 532-535, p. 237-243 7 p.

Research output: Contribution to journal › Conference article

Electron tunneling

Porphyrins

electron tunneling

porphyrins

Photons

2002

Inter- and intra-molecular energy transfers of encapsulated dyes in dendrimers

Otomo, A., Zhou, M., Furumi, S., Yokoyama, S. & Mashiko, S., Dec 1 2002, In : Proceedings of SPIE - The International Society for Optical Engineering. 4798, p. 37-43 7 p.

Research output: Contribution to journal › Conference article

Dendrimers

dendrimers

Energy Transfer

Dyes

Energy transfer

Rigid optical chromophore: The photophysical properties of p-phenylene benzobisthiazole derivative

Lee, S. H., Otomo, A., Nakahama, T., Yamada, T., Yokoyama, S. & Mashiko, S., Jan 1 2002, In : Materials Research Society Symposium - Proceedings. 708, p. 323-327 5 p.

Research output: Contribution to journal › Conference article

Chromophores

chromophores

Derivatives

Rayleigh scattering

Propanol

Triplet-triplet energy transfer in photocrosslinkable dendrimers

Furumi, S., Otomo, A., Yokoyama, S. & Mashiko, S., Jan 1 2002, In : Materials Research Society Symposium - Proceedings. 725, p. 255-260 6 p.

Research output: Contribution to journal › Conference article

Dendrimers

dendrimers

Energy transfer

energy transfer

Photoisomerization

2001

13 Citations (Scopus)

Effect of the metal/organic interface phenomena on the current-voltage characteristics of organic single electron tunneling device

Kubota, T., Yokoyama, S., Nakahama, T., Mashiko, S., Noguchi, Y., Majima, Y. & Iwamoto, M., Aug 1 2001, In : Thin Solid Films. 393, 1-2, p. 379-382 4 p.

Research output: Contribution to journal › Conference article

Electron tunneling

Current voltage characteristics

electron tunneling

Metals

Electric potential

1 Citation (Scopus)

Remarkable optical properties of dendrimers for laser applications

Otomo, A., Otomo, S., Yokoyama, S., Nakahama, T. & Mashiko, S., Dec 1 2001, In : Proceedings of SPIE - The International Society for Optical Engineering. 4461, p. 180-187 8 p.

Research output: Contribution to journal › Conference article

Dendrimers

Laser applications

laser applications

dendrimers

Optical Properties

18 Citations (Scopus)

Spatial photon confinement and super-radiation from dye cored dendrimer

Yokoyama, S., Otomo, A., Nakahama, T. & Mashiko, S., Aug 1 2001, In : Thin Solid Films. 393, 1-2, p. 124-128 5 p.

Research output: Contribution to journal › Conference article

Dendrimers

dendrimers

Chromophores

chromophores

Coloring Agents

6 Citations (Scopus)

Stimulated emission in dendrimer-doped polymer waveguides

Otomo, A., Otomo, S., Yokoyama, S. & Mashiko, S., Aug 1 2001, In : Thin Solid Films. 393, 1-2, p. 278-283 6 p.

Research output: Contribution to journal › Conference article

Dendrimers

Stimulated emission

dendrimers

stimulated emission

Polymers

Synthesis of new dendrimers based on 6,8-dinitroquinazoline and 3,5-dimercaptobenzyl blocks

Miki, H., Yokoyama, S. & Mashiko, S., Dec 1 2001, In : Materials Research Society Symposium - Proceedings. 660

Research output: Contribution to journal › Conference article

Dendrimers

dendrimers

synthesis

photoelectronics

electron orbitals

2000

2 Citations (Scopus)

Ab initio calculations of first hyperpolarizabilities for donor-acceptor azobenzenes and their dimers

Okuno, Y., Yokoyama, S. & Mashiko, S., Dec 1 2000, In : Molecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics. 26, 1-3, p. 83-90 8 p.

Research output: Contribution to journal › Conference article

Azobenzene

Dimers

optical activity

dimers

monomers

Intermolecular coupling enhancement of the molecular hyperpolarizability in multi-chromophoric dipolar dendrons

Yokoyama, S., Otomo, A. & Mashiko, S., Dec 1 2000, In : Materials Research Society Symposium - Proceedings. 598

Research output: Contribution to journal › Conference article

Dendrimers

Azobenzene

chromophores

Chromophores

augmentation

Intermolecular coupling enhancement of the molecular hyperpolarizability in NLO dendrons

Yokoyama, S. & Mashiko, S., Dec 1 2000, In : Molecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics. 24, 1-2, p. 47-50 4 p.

Research output: Contribution to journal › Conference article

Dendrimers

Azobenzene

chromophores

augmentation

Chromophores

28 Citations (Scopus)

STM induced photon emission from adsorbed porphyrin molecules on a Cu(100) surface in ultrahigh vacuum

Fujita, D., Ohgi, T., Deng, W. L., Nejo, H., Okamoto, T., Yokoyama, S., Kamikado, K. & Mashiko, S., May 20 2000, In : Surface Science. 454, 1, p. 1021-1025 5 p.

Research output: Contribution to journal › Conference article

Porphyrins

Ultrahigh vacuum

porphyrins

ultrahigh vacuum

Photons

1997

9 Citations (Scopus)

Preparation of chromophoric dipolar dendrons as second-order nonlinear optical material

Yokoyama, S. & Mashiko, S., Dec 1 1997, In : Materials Research Society Symposium - Proceedings. 488, p. 765-770 6 p.

Research output: Contribution to journal › Conference article

Dendrimers

Optical materials

optical materials

Harmonic generation

harmonic generations

1994

8 Citations (Scopus)

Various orientations of pendant dye attached to polyamic Langmuir and Langmuir-Blodgett films studied by an optical second-harmonic generation interferometry technique

Tamada, T., Yokoyama, S., Kajikawa, K., Ishikawa, K., Takezoe, H., Fukuda, A., Kakimoto, M. A. & Imai, Y., Jan 1 1994, In : Thin Solid Films. 244, 1 -2 pt 3, p. 754-757 4 p.

Research output: Contribution to journal › Conference article

Langmuir Blodgett films

Langmuir-Blodgett films

Harmonic generation

Interferometry

harmonic generations