Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Shiyoshi Yokoyama Last modified date:2019.10.01

Professor / Department of Advanced Device Materials / Institute for Materials Chemistry and Engineering


Papers
1. Andrew M. Spring, Feng Qiu, Jianxun Hong, Alisa Bannaron, Xiaoyang Cheng, Shiyoshi Yokoyama, Adamantyl and carbazole containing trans-poly(norbornene-dicarboximide)s as electro-optic chromophore hosts, Polymer, doi.org/10.1016/j.polymer.2019.04.015, 172, 382-390, 2019.04.
2. X. Cheng, F. Qiu, A. M. Spring, M. Sasaki, T. Kashino, M. Ozawa, H. Nawata, T. Kita, O. Sugihara, and S. Yokoyama, Camera Sensor Platform for High Speed Video Data Transmission Using a Wideband Electro-Optic Polymer Modulator
, Optics Express, https://doi.org/10.1364/OE.27.001877, 27, 3, 1877-1883, 2019.01.
3. Clemens Kieninger, Yasar Kutuvantavida, Hiroki Miura, Juned N. Kemal, Heiner Zwickel, Feng Qiu, Matthias Lauermann, Wolfgang Freude, Sebastian Randel, Shiyoshi Yokoyama, and Christian Koos, Demonstration of long-term thermally stable Silicon-Organic Hybrid Modulators at 85 °C, Optics Express , https://doi.org/10.1364/OE.26.027955, 26, 27955-27964, 2018.11.
4. Clemens Kieninger, Yasar Kutuvantavida, Hiroki Miura, Juned N. Kemal, Heiner Zwickel, Feng Qiu, Matthias Lauermann, Wolfgang Freude, Sebastian Randel, Shiyoshi Yokoyama, Christian Koos, Demonstration of long-term thermally stable Silicon-Organic Hybrid Modulators at 85 °C, arXiv, 1807.00774, 2018.09.
5. Feng Qiu, Andrew. M. Spring, Jianxun Hong, and Shiyoshi Yokoyama, Plate-slot Polymer Waveguide Modulator on Silicon-on-insulator, Optics Express, https://doi.org/10.1364/OE.26.011213, 26, 11213-11221, 2018.04.
6. Jianxun Hong, Feng Qiu, Andrew. M. Spring, and Shiyoshi Yokoyama, A High Efficiency and Wide Bandwidth Segmented Silicon Grating Coupler, Applied Optics, https://doi.org/10.1364/AO.57.003301 , 57, 3301-3305, 2018.04.
7. Feng Qiu, Andrew. M. Spring, Jianxun Hong, Hiroki Miura, Tsubasa Kashino, Takamasa Kikuchi, Masaaki Ozawa, Hideyuki Nawata, Keisuke Odoi, and Shiyoshi Yokoyama, Electro-optic Polymer Ring Resonator Modulator on a Flat Silicon-on-Insulator, Laser & Photonics Review , https://doi.org/10.1002/lpor.201700061 , 11, 1700061 1-6, 2017.11.
8. Hiroki Miura, QIU FENG, Andrew Mark Spring, Tsubasa Kashino, Takamasa Kikuchi, Masaaki Ozawa, Hideyuki Nawata, Keisuke Odoi, Shiyoshi Yokoyama, High thermal stability 40 GHz electro-optic polymer modulators, Optics Express, 25, 28643-28649, 2017.10.
9. Andrew Mark Spring, QIU FENG, Crosslinked poly(norbornene-dicarboximide)s as electro-optic chromophore hosts, Alisa Bannaron, Tsubasa Kashino, Kikuchi, Masaaki, Hideyuki Nawata, Keisuke Odoi, Shiyoshi Yokoyama, Crosslinked poly(norbornene-dicarboximide)s as electro-optic chromophore hosts, European Polymer Journal, 97, 263-271, 2017.10.
10. Xiaoyan Cheng, Jianxun Hong, Andrew Mark Spring, Shiyoshi Yokoyama, Fabrication of a high-Q factor ring resonator using LSCVD deposited Si3N4 film, OPTICAL MATERIALS EXPRESS, 10.1364/OME.7.002182, 7, 7, 2182-2187, 2017.07.
11. Jianxun Hong, QIU FENG, Xiaoyang Chen, Andrew Mark Spring, Shiyoshi Yokoyama, A high-speed electro-optic triple-microring resonator modulator, Scientific Reports, 7, 4682-4682-6, 2017.07.
12. Andrew Mark Spring, QIU FENG, Jianxun Hong, Alisa Bannaron, Shiyoshi Yokoyama, Electro-optic properties of a side chain poly(norbornenedicarboximide) system with an appended phenylvinylene thiophene chromophore, Polymer, 119, 13-27, 2017.05.
13. Hiromu Sato, Hiroki Miura, QIU FENG, Andrew Mark Spring, Tsubsa Kashino, Takamasa Kikuchi, Masaako Ozawa, Keisuke Odoi, Shiyoshi Yokoyama, Low Driving Voltage Mach-Zehnder Interference Modulator Constructed from an Electro-optic Polymer on Ultr-thin Silicon with a Broadband Operation, Optics Express, http://dx.doi.org/10.1364/OE.25.000768, 25, 768-775, 2017.01.
14. QIU FENG, Hiroki Miura, Andrew Mark Spring, Daisuke Maeda, Masaaki Ozawa, Jianxun Hong, Keisuke Odoi, Shiyoshi Yokoyama, An electro-optic polymer-cladded TiO2 waveguide modulato, Appl. Phys. Lett., http://dx.doi.org/10.1063/1.4966272, 109, 173301-1-173301-4, 2016.10.
15. Andrew Mark Spring, QIU FENG, Shiyoshi Yokoyama, High stability poly(N-adamantyl-exo-norbornene-5,6-dicarboximide) and phenyl vinylene thiophene electro-optic host-guest system, European Polymer Journal, 84, 89-99, 2016.09.
16. QIU FENG, Shiyoshi Yokoyama, Efficiently poled electro-optic polymer modulators, Optics Express, 24, 19020-19025, 2016.08.
17. QIU FENG, Andrew Mark Spring, Hiroki Miura, Daisuke Maeda, Masa-aki Ozawa, Keisuke Odoi, Shiyoshi Yokoyama, Athermal Hybrid Silicon/Polymer Ring Resonator Electro-optic Modulator, ACS Photonics , 10.1021/acsphotonics.5b00695, 3, 780-783, 2016.04.
18. Qiu Feng, Hiromu Sato, Andrew M. Spring, Daisuke Maeda, Masa-aki Ozawa, Keisuke Ozawa, Isao Aoki, Akira Otomo, Shiyoshi Yokoyama, Ultra-thin silicon/electro-optic polymer hybrid waveguide modulators, Appl. Phys. Lett., 10.1063/1.4931490, 107, 123302-1-123302-5, 2015.09.
19. Qiu Feng, Andrew M. Spring, Shiyoshi Yokoyama, Athermal and high-Q hybrid TiO2–Si3N4 ring resonator via an etching-free fabrication technique, ACS Photonics, 10.1021/ph500450n, 2, 405-409, 2015.04.
20. Qiu Feng, Andrew M. Spring, Disuke Maeda, Masaaki Ozawa, Keisuke Odoi, Isao Aoki, Akira Otomo, Shiyoshi Yokoyama, A hybrid electro-optic polymer and TiO2 double-slot waveguide modulator, Scientific Reports, 10.1038/srep08561, 5, 8561-1-8561-6, 2015.03, 酸化チタン細線導波路と電気光学ポリマーを使ったハイブリッド光変調デバイスを作製し、理論的な解析と光学計測によって優れた光学特性を評価した。光導波路の電気光学定数は140pm/Vであり、ダブルスロット構造を持つ光導波路内で光変調特性が増強していることを明にした。また、光変調の動作電圧は1.6Vであり、従来の無機系光変調デバイスを凌駕する低電力動作も確認された。.
21. Andrew M. Spring, Daisuke Maeda, Masaaki Ozawa, Keisuke Odoi, Qiu Feng, Kazuhiro Yamamoto, Shiyoshi Yokoyama, An Analysis of the Structural, Thermal and Optical Characteristics as well as the Electrical Resistivity of tert-butyldiphenylsilyl Substi-tuted Poly(norbornene-dicarboximide)s, Polymer, 56, 189-198, 2014.12.
22. Andrew M. Spring, Daisuke Maeda, Masaaki Ozawa, Keisuke Odoi, Qiu Feng, Kazuhiro Yamamoto, Shiyoshi Yokoyama, Glass Transition Temperature Control by Poly(norbornene-dicarboximide) Copolymers, Polymer Bulletin, 10.1007/s00289-014-1283-2, 2014.11.
23. QIU FENG, SPRING ANDREW, Daisuke Maeda, Masaaki Ozawa, Keisuke Odoi, Akira Otomo, Shiyoshi Yokoyama, A Straightforward Electro-optic Polymer Covered Titanium Dioxide Strip Line Modulator with a Low Driving Voltage, Applied Physics Letters, 105, 073305-1-073305-4, 2014.08.
24. Qiu Feng, Andrew M. Spring, D. Maeda, M. Ozawa, K. Odoi, I. Aoki, A. Otomo, Shiyoshi Yokoyama, TiO2 ring-resonator-based EO polymer modulator, Optics Express, 22, 14101-14107, 2014.06.
25. Andrew M. Spring, Feng Yu, Qiu Feng, Kazuhiro Yamamoto, Shiyoshi Yokoyama, The preparation of well-controlled poly(N-cyclohexyl-exo-norbornene-5,6-dicarboximide) polymers, Polymer J. , 10.1038/pj.2014.26, 2014.05.
26. Yue Jya, Andrew Spring, Kazuhiro Yamamoto, Isao Aoki, Akira Otomo, Shiyoshi Yokoyama, A Norbornene polymer brush for electro-optic applications, Thin Solid Films, 10.1016/j.tsf.2013.06.071, 554, 175-179, 2014.02.
27. Yue Jia, Andrew M. Spring, Qiu Feng, Yu Feng, Kazuhiro Yamamoto, Isao Aoki, Akira Otomo, Shiyoshi Yokoyama, Electro-optic properties of a bi-chromophore norbornene polymer brush system, Japn. J. Appl. Phys. , 53, 01AF04-1-01AF04-5, 2014.01.
28. Qiu Feng, Andrew Spring, Yu Feng, Isao Aoki, Akira Otomo, Shiyoshi Yokoyama, Electro-optic polymer / titanium dioxide hybrid core ring resonator modulators, Laser Photoncis Revew, 7, 84-88, 2013.11.
29. Qiu Feng, Andrew Spring, Yu Feng, Isao Aoki, Akira Otomo, Shiyoshi Yokoyama, Thin TiO2 core and electro-optic polymer cladding waveguide modulators , Appl. Phys. Lett, 102, 233504-1--3, 2013.07.
30. Kazuhiro Yamamoto, Feng Yu, Lu Li, Shiyoshi Yokoyama, Akira Otomo, Kei Yasui, Masaaki Ozawa, Electro-optic waveguide with conductive chromophore contained polymer cladding, Proc SPIE, 8622, 86221K-1-86221K-6, 2013.02.
31. Kazuhiro Yamamoto, Shiyoshi Yokoyama, Akira Otomo, On-chip superfocusing of surface plasmon using metal-coat tapered optical fiber pairs with nano-gap structures, Proc SPIE, 8632, 863228-1-863228-8, 2013.02.
32. Feng Yu, A. M. Spring, Lu Li, Feng Qiu, Kazuhiro Yamamoto, Daisuke Maeda, Masaaki Ozawa, Keisuke Oodoi, Shiyoshi Yokoyama, An Enhanced Host-guest Optical Polymer System using Poly(norbornene-dicarboximide) via ROMP, J. Polym. Scie. A, 51, 1278-2184, 2012.12.
33. Feng Qiu, Feng Yu, Andrew M. Spring, and Shiyoshi Yokoyama, Thermal-sensitive wavelength filter based on polymer waveguide and polarization-maintaining fiber, J. Opt. Soc. Am. B, 29, 3069-3071, 2012.11.
34. F. Qui, F. Yu, A. M. Spring, and S. Yokoyama, An Athermal Silicon Nitride Ring Resonator by Photobreaching DR1/PMMA Polymer, Opt. Lett., 37, , 4086-4088, 2012.09.
35. X. Piao, X. Zhang, S. Inoue, S. Yokoyama, I. Aoki, H. Miki, A. Otomo, and H. Tazawa, Enhancement of Electro-Optic Activity by Introduction of a Benzyloxy Group to Conventional Donor-p-acceptor Molecules, Organic Electronics, 12, 1093-1097, 2011.05.
36. X. Piao, Z. Zhang, Y. Mori, M. Koishi, A. Nakaya, S. Inoue, I. Aoki, A. Otomo, and S. Yokoyama, Nonlinear Optical Side-chain Polymers Postfunctionalized with High-β Chromophores Exhibiting Large Electro-optic Property
, J. Polym. Sci. Part A, 49, 47-54, 49, 47-54, 2011.01.
37. X. Zhang, I. Aoki, X. Piao, S. Inoue, H. Tazawa, S. Yokoyama, and A. Otomo , Effect of Modified Donor Units on Molecular Hyperpolarizability of Thienyl-Vinylene Nonlinear Optical Chromophores
, Tetrahedron Lett., 51, 5873-5876, 51, 5873-5876, 2010.09.
38. Azusa Inoue, Shin-ichiro Inoue, Shiyoshi Yokoyama, Enhanced electro-optic response of a poled polymer in a reflective microcavity, Optics Communications, 283, 2935-2938, 2010.07.
39. Xingsheng Xu, Toshiki Yamada, and Shiyoshi Yokoyama, Modification of two-photon excited fluorescence from quantum dots on SiN photonic crystals, Optics Letters, 35, 3, 309-311, 35, 3, 309-311, 2010.02.
40. K. Sasaki, S. Inoue, K. Nishio, H. Masuda, A. Otomo, and S. Yokoyama, Polymer Micro-structure Embedded in Two-Dimensional Photonic Crystals, Opt. Mater., 32, 543-546, 32, 543-546, 2010.01.
41. X. Piao, Y. Mori, X. Piao, S. Inoue, and S. Yokoyama, Hyper-branched Polymer for Electro-optic Applicaitons, Proc SPIE, 7599, G1-G10, 7599, G1-10, 2010.01.
42. S. Inoue and S. Yokoyama, Numerical Simulation of an Ultra-compact Electro-optic Modulator Based on Nanoscale Plasmon Metal Gap Waveguides, Elec. Lett., 45, 1087-1088, 45, 1087-1088, 2009.11.
43. X. Xu, T. Yamada, and S. Yokoyama, Correlation between Antibunching and Blinking of Photoluminescence from a CdSe/ZnS Quantum Dot, Eur. Phys. J. D, 55, 691-697, 55, 691-697, 2009.11.
44. S. Furumi, A. Otomo, S. Yokoyama, and S. Mashiko, Photochemical and Photophysical Reactions of Poly(propylene imine) Dendrimers Tethering Cinnamamide Groups, Polymer, 50, 2944-2952, 50, 2944-5952, 2009.05.
45. A. Inoue,S. Inoue,S. Yokoyama,K. Kojima,K. Yasui,M. Ozawa, and O. Masaaki, One dimensional polymeric photonic crystal doped with second-order nonlinear optical chromophore, Proc. SPIE Int. Soc. Opt. Eng., 7213, 72131C1-8 (200), 2009.02.
46. S. Inoue and S. Yokoyama, Enhancing the two-photon excited fluorescence by two-dimensional nonlinear optical-polymer photonic crystals, Proc. SPIE Int. Soc. Opt. Eng., 7212, 72131I1-8 (2009), 2009.02.
47. X. Piao, S. Inoue, S. Yokoyama, H. Miki, I.. Aoki, A. Otomo, H. Tazawa, Synthesis and Characterization of Binary Chromophore Polymers for Eelectro-optic Application, Thin Solid Films, 518, 481-484, 518, 481-484, 2009.02.
48. S. Inoue and S. Yokoyama, Nonlinear Optical Responses in Two-Dimensional Photonic Crystals, Thin Solid Films, 518, 470-472, 2009.02.
49. S. Inoue and S. Yokoyama, Enhancement of two-photon excited fluorescence in two-dimensional nonlinear optical polymer photonic crystal waveguides, Appl. Phys. Lett., 93, 11110-1-5, 2008.09.
50. S. Yokoyama, S. Inoue, and K. Sasaki, Two-photon polymer laser writing in the photonic crystal, Proc. SPIE, 7049, 70490K1-8(2008), 2008.08.
51. T. Nakahama, S. Yokoyama, H. Miki, and S. Mashiko, Control of Multiphoton Process within Diffraction Limit Space in Polymer Microstructures, Thin Solid Films, 499, pp. 406-409 (2006), 2008.03.
52. Y. Naitoh, A. Otomo, H. Miki, I. Aoki, and S. Yokoyama, The fluorescence behavior from SAM of dendron with rhodamine B as a center, Thin Solid Films, 516, pp. 2371-2375 (2008), 2008.03.
53. T. Yamada, H. Shinohara, T. Kamikado, Y. Okuno, H. Suzuki, S. Mashiko, and S.Yokoyama, Nanosecond and femtosecond mass spectroscopic analysis of a molecular beam produced by the spray-jet technique, Thin Solid Films, 516, pp. 2522-2526 (2008), 2008.03.
54. Y. Okuno and S. Yokoyama, Theoretical study of molecular rectificafion in porphyrin dimer, Thin Solid Films, 516, pp. 2630-2634 (2008), 2008.03.
55. Y. Noguchi, R. Ueda, T. Kubota, T. Kamikado, S. Yokoyama, and T. Nagase, Observation of negative differential resistance and single-electron tunneling in electromigrated break junctions, Thin Solid Films, 516, pp. 2762-2766 (2008), 2008.03.
56. K. Kurihara, A. Otomo, A. Syouji, J. Takahara, K. Suzuki, and S. Yokoyama, Superfocusing modes of surface plasmon polaritons in conical geometry based on the quasi-separation of variables approach, J. Phy. A, MAT. THEO., 40, pp. 12479-12503 (2007), 2007.08.
57. T. Yamada, H. Shinohara, S. Mashiko, and S. Yokoyama, Analysis of a molecular beam produced by the spray-jet technique with femtosecond laser mass spectroscopy, Mol. Crys. Liq. Crys, 472, pp. 561-569 (2007), 2007.06.
58. T. Kamikado, T. Sekiguchi, S. Yokoyama. and S. Mashiko, Control of Single Supramolecular Chain of Porphyrin ona Copper Surface, Thin Solid Films, 499, 329-332 (2006), 2007.03.
59. F. Nishiyama, T. Yokoyama, T. Kamikado, S. Yokoyama, S. Mashiko, K. Sakaguchi, K. Kikuchi, Interstitial accommodation of C-60 in a surface-supported supramolecular network, Adv. Mater., 19, pp. 117-120 (2007), 2007.03.
60. F. Nishiyama, T. Yokoyama, T. Kamikado, S. Yokoyama, and S. Mashiko, Interstitial Accomodation of C-60 in a Surface-supported Supramolecular Network, Adv. Mater., 19, 117 (2007), 2007.01.
61. S. Yokoyama, Single-mode Polymer DFB Lasers with Two-dimensional Microcavity Structures, IEICE Transactions on Electronics, E90, 135 (2007), 2007.01.
62. S. Yokoyama, T. Nakahama, and S. Mashiko, Two-photon-photopolymeric Micro-nano Fabrication fot Polymer Device Applications, Proc. SPIE, 6376 (2006), 2007.01.
63. S. Yokoyama, Single-mode polymer DBR lasers with two-dimensional microcavity structures, IEICE TRANS. ELECT., E90C, pp. 135-138 (2007), 2007.01.
64. F. Nishiyama, T. Yokoyama, T. Kamikado, S. Yokoyama, and S. Mashiko, Layer-by-Layer Growth of Porphyrin Supermolecular Thin Films, Appl. Phys. Lett, 88, pp. 253113 1-3 (2006), 2006.06.
65. H. Miki, A. Otomo, S. Yokoyama, and S. Mashiko, Synthesis and Luminescence Properties of Benzylthioether Dendrons Bearing Rhodamine B at the Focal Point, Thin Solid Films, 499, pp. 333-337 (2006), 2006.03.
66. S. Yokoyama, T. Nakahama, H. Miki, and S. Mashiko, Two-phoron-Induced Polymerization in a Photonic Crystal Template for Optical Device Application , Abst. Paper of the Am. Chem. Soc., 231, 69 (2006), 2006.03.
67. T. Terui, S. Yokoyama, H. Suzuki, and S. Mashiko, Structure of Thin Films of Tertiary-phenyl-porphyrin Derivatives on Gold Surface, Thin Solid Films, 499, 157-160 (2006), 2006.03.
68. S. Furumi, S. Yokoyama. A. Otomo, and S. Mashiko , Control of Photonic bandgap in Chiral Liquid Crystals for Distributed Feedback Effect, Thin Solid FIlms, 2006.03.
69. T. Terui, S. Yokoyama, H. Suzuki, S. Mashiko, M. Sakurai, and T. Moriwaki, Structure of Thin Films of Tertiary-phenyl-porphyrin Derivatives on Gold Surface, Thin Solid Films, 499, pp. 157-160 (2006), 2006.03.
70. H. Masuda, M. Yamada, F. Matsumoto, S. Yokoyama, S. Mashiko, M. Nakao, and K. Nishio, Lasing from Two-dimensional Photonic Crystals Using Anodic Porous Alumina, Adv. Mater., 18, pp. 213-126 (2006), 2006.02.
71. S. Yokoyama, S. Mashiko, H. Kikuchi, K. Uchida, and T. Nagamura, Laser Emission from a Polymer-Stabilized Liquid Crystaline Bule Phase, Adv. Mater., 18, pp. 48-51 (2006), 2006.01.
72. S. Yokoyama, T. Nakahama, S. Mashiko, M. Nakao, M. Yamada, K. Nishio, and H. Masuda, Photonic Crystal Templates for Organic Solid-state Laser, Appl. Phys. Lett., 87, pp. 191101 1-3 (2005), 2005.11.
73. S. Furumi, S. Yokoyama, A. Otomo, and S. Mashiko, Phototunable Photonic Band-gap in a Chiral Liquid Crystal Laser Device, Appl. Phys. Lett, 84, pp.2491-2493 (2004), 2005.04.
74. S. Yokoyama, T. Nakahama, and S. Mashiko, Amplified Spontaneous Emission and Laser Emission from a High Optical-gain medium of Dye-doped Dendrimer, J. Luminescence, 111, pp. 285-290 (2005), 2005.04.
75. T. Kamikado, T. Sekiguchi, S. Yokoyama, Y. Wakayama, and S. Mashiko, Control of Single Supramolecular Chain of Porphyrin on a Copper Surface, Thin Solid Films, 499, pp. 329-332 (2006).
76. S. Furumi, S. Yokoyama, A. Otomo, and S. Mashiko, Control of Photonic Bandgaps in Chiral Liquid Crystals for Distributed Feedback Effect, Thin Solid Films, 499, pp. 322-328 (2006).
77. D. Fujita, T. Ohgi, W. ?L. Deng, H. Hejo, T. Okamoto, S. Yokoyama, K. Kamikado, and S. Mashiko, STM Induced Photon Emission from Adsorbed Porphyrin Molecules on a Cu(100) Surface in Ultrahigh Vacuum, Surface Science,, 454, pp. 1021-1025 (2000).
78. Y. Yamaguchi, Y. Yokomichi, S. Yokoyama, and S. Mashiko, Molecular Design of Novel Azobenzene Dendrimers, Polym. Adv. Tech., 11, pp. 674-684 (2000).
79. Y. Okuno, S. Yokoyama, and S. Mashiko, Ab. Initio Calculations of First Hyperpolarizability for Donor-Acceptor Azobenzene and their Dimers, Nonlinear Optics, 26, pp. 83-90 (2000).
80. A. Otomo, S. Yokoyama, T. Nakahama, and S. Mashiko, Super-narrowing Mirrorless Laser Emission in Dendrimer-doped Polymer Waveguide, Appl. Phys. Lett., 77, pp. 3881-3883 (2000).
81. S. Yokoyama, S. Mashiko, Y. Yamaguchi, and Y. Yokomichi, Computational and Experimental Studies of Azobenzene Dendrons for Nonlinear Optical Applications, Polym. Adv. Tech., 11, pp. 692-697 (2000).
82. S. Yokoyama and S. Mashiko, Intermolecular Coupling Enhancement of the Molecular Hyperpolarizability in NLO Dendrimers, Nonlinear Optics, 24, pp. 47-50 (2000).
83. S. Yokoyama, T. Nakahama, A. Otomo, and S. Mashiko, Intermolecular Coupling Enhancement of the Molecular Hyperpolarizability in Multi-choromophoric Dipolar Dendrons, J. Am. Chem. Soc., 122, pp. 3174-3181 (2000).
84. T. Yokoyama, S. Yokoyama, T. Kamikado, Y. Okuno, and S. Mashiko, Selective Assembly on a Surface of Supramolecular Aggregates with Controlled Size and Shape, Nature, 413, pp. 619-621 (2001).
85. D. Fujita, T. Ohgi, W. Deng, K. Ishige, T. Okamoto, S. Yokoyama, and S. Mashiko, Photon Emission Induced by Tunneling Electrons from a Cu(100) Surface Covered with Porphyrin Molecules, Surface Science, 193, pp. 702-707 (2001).
86. T. Kubota, S. Yokoyama, T. Nakahama, S. Mashiko, Y. Noguchi, Y. Majima, and M. Iwamoto, Effect of the Metal/organic Interface Phenomena on the Current-voltage Characteristics of Organic Single Electron Tunneling Device,, Thin Solid Films, 393, pp. 379-382 (2001).
87. T. Yokoyama, S. Yokoyama, T. Kamikado, and S. Mashiko, Nonplanar Adsorption and Orientational Ordering of Porphyrin Molecules on Au (111), J. Chem. Phys., 115, pp. 3814-3818 (2001).
88. Y. Yamaguchi, Y. Yokomichi, S. Yokoyama, and S. Mashiko, Time-dependent Density Functional Calculations of the Q-like Bands of Phenylene-linked Free-base and Zinc Porphyrin Dimers, Int. J. Quantum Chem., 84, pp. 338-347 (2001).
89. Y. Yamaguchi, Y. Yokomichi, S. Yokoyama, and S. Mashiko, Theoretical Prediction of First-order Hyperpolarizabilities of Azobenzene Dendrimers,, J. Mol. Structure-Theochem., 545, pp. 187-196 (2001).
90. Y. Okuno, S. Yokoyama, and S. Mashiko, Interaction between Monomeric Units of Donor-Acceptor Functionalized Azobenzene Dendrimers: Effects on Macroscopic Configuration and First Hyperpolarizability, J. Phys. Chem. B, 105, pp. 2163-2169 (2001).
91. A. Otomo, S. Otomo, S. Yokoyama, and S. Mashiko, Stimulated Emission in Dendrimer-doped Polymer Waveguide, Thin Solid Films, 393, pp. 278-283 (2001).
92. M. Zhou, A. Otomo, S. Yokoyama, and S. Mashiko, Estimation of Organic-molecular Film Structure using Surface-plasmon Resonance Spectroscopy, Thin Sold Films, 393, pp. 114-118 (2001).
93. Y. Yamaguchi, S. Yokoyama, and S. Mashiko, Strong Coupling of the Single Excitation in the Q-like Bands of Phenylene-linked Free-base and Zinc Bacteriochlorin Dimers: A Time-dependent Density Functional Theory Study, J. Chem. Phys., 116, pp. 6541-6548 (2002).
94. W. Deng, D. Fujita, T. Ohgi, S. Yokoyama, K. Kamikado, and S. Mashiko, STM-induced Photon Emission from Self-assembled Porphyrin Molecules on a Cu (100) surface, J. Chem. Phys., 117, pp. 4995-5000 (2002).
95. Y. Okuno, T. Yokoyama, S. Yokoyama, T. Kamikado, and S. Mashiko, Theoretical Study of Benzonitrile Clusters in the Gas Phase and Adsorption onto a Au(111)-surface, J. Am. Chem. Soc., 124, pp. 7218-7225 (2002).
96. D. Fujita, T. Ohgi, W. Deng, H. Nejo, T. Okamoto, S. Yokoyama, and S. Mashiko, STM Induced Photon Emission from Adsorbed Porphyrin Molecules on a Cu(100) Surface in Ultrahigh Vacuum, Surface Science, 454, pp. 1021-25 (2002).
97. H. Yanagi, H. Mukai, K. Ikuta, T. Shibutani, T. Kamikado, S. Yokoyama, and S. Mashiko, Molecularly Resolved Dynamics for Two-dimensional Nucleation of Supramolecular Assembly, Nano Lett., 2, pp. 601-604 (2002).
98. Z. C. Dong, A. Kar, Z. ?Q. Zou, T. Oghi, P. Dorozhkin, D. Fujita, S. Yokoyama, T. Terui, T. Yamada, T. Kamikado, M. Zhou, S. Mashiko, and T. Okamoto, Light Emission from Porphyrin Molecules Induced by a Scannin Tunneling Microspce, Jpn. J. Appl. Phys., 41, pp. 4898-4902 (2002).
99. Y. Okuno, T. Kamikado, S. Yokoyama, and S. Mashiko, Theoretical Study of Aryl-ring Rotation in Arylphorphyrins, J. Mol. Structure-Theochem, 594, pp. 55-60 (2002).
100. S. H. Lee, A. Otomo, T. Nakahama, T. Yamada, T. Kamikado, S. Yokoyama and S. Mashiko, Novel Rigid-rod 2,6-Diphenylbenzo[1,2-d:4,5-d’]bisthiazole (DPBBT) Derivatives for Second-order Nonlinear Optical Chromophores, J. Mater. Chem., 12, pp. 2187-2188 (2002).
101. A. Otomo, S. Otomo, S. Yokoyama, and S. Mashiko, Photochemical Stability of Encapsulated Laser Dyes in Dendritic Nanoboxes Against Singlet Oxygen, Opt. Lett., 27, pp. 891-893 (2002).
102. S. Yokoyama, T. Nakahama, A. Otomo, and S. Mashiko,, Suprafluorescence Action from Rhodamine-cored Dendrimer, Coll. Surf. A, 198, pp. 433-438 (2002).
103. S. Yokoyama, A. Otomo, and S. Mashiko, Laser Emission from High-gain media of Dye-doped Dendrimer, Appl. Phys. Lett, 80, pp. 7-9 (2002).
104. Z. C. Dong, A. Trifonov, X. ?L. Guo K. Amemiya, S. Yokoyama, T. Kamikado, T. Yamada, S. Mashiko, and T. Okamoto, Tunneling Electron Induced Photon Emission from Monolayered H2TBPP porphyrin on Cu (100), Surface Science, 532, pp. 237-243 (2003).
105. X. L. Guo, Z. ?C. Dong, A. Trifonov, S. Yokoyama, S. Mashiko, and T. Okamoto, Light Emission from Organic Molecules on Metal Substrate Induced by Tunneling, Jpn, J. Appl. Phys, 42, pp. 6937-6940 (2003).
106. Z. C. Dong, A. Kar, R. Dorozhkin, K. Amemiya, T. Uchihashi, S. Yokoyama, K. Kamikado, S. Mashiko, and T. Okamoto, Tunneling Electron Induced Luminescence from Monolayered Cu-TBP Porphyrin molecules adsorbed on Cu (100), Thin Solid Films, 438, pp. 262-267 (2003).
107. H. Suzuki, H. Miki, S. Yokoyama, and S. Mashiko, Molecule Isomers by Using a Scanning Tunneling Microscope, J. Phys. Chem. B, 107, pp. 3659-3662 (2003).
108. Y. Okuno, T. Kamikado, S. Yokoyama, S. Mashiko, Determining the Conformation of a Phenyene-linked porphyrin Dimer by NMR Spectroscopy and Quantum Chemical Calculations, J. Mol. Structure-Theochem, 631, pp. 13-20 (2003).
109. H. Suzuki, H. Miki, S. Yokoyama, and S. Mashiko, Segregation of Molecular Overlayers with Different Structures on a Metal Surface, Thin Solid Films, 437, pp. 97-100 (2003).
110. S. Furumi, S. Yokoyama, A. Otomo, and S. Mashiko, Study on Laser Action from UV-curable Chiral Nematic Liquid Crystals, Thin Sold Films, 438, pp. 423-427 (2003).
111. S. Furumi, A. Otomo, S. Yokoyama, and S. Mashiko, Effective Photocrosslinking Reaction of Dendrimers through Triplet Energy Transfer, Thin Solid Films, 438, pp. 85-89 (2003).
112. S. Furumi, S. Yokoyama, A. Otomo, and S. Mashiko, Electrical Control of the Structure and Lasing in Chiral Photonic Band-gap Liquid Crystals, Appl. Phys. Lett, 82, pp. 16-18 (2003).
113. S. Yokoyama, T. Nakahama, H. Miki, and S. Mashiko, Fabrication of Three-dimensional Microstructure in an Optical Gain Medium Using Two-photon-induced Photopolymerization Technique, Thin Solid Films, 438, pp. 452-456 (2003).
114. S. Yokoyama and S. Mahsiko, Tuning of Laser Frequency in Random Media of Dye-doped Polymer and Glass Particle Hybrid, Jpn. J. Appl. Phys, 42, pp. L970-973 (2003).
115. S. Yokoyama, T. Nakahama, H. Miki, and S. Mashiko, Two-photon-induced Polymerization in a Laser Gain Medium for Optical Microstructure, Appl. Phys. Lett, 82, pp. 3221-3223 (2003).
116. X. L. Guo, Z. C. Dong, A. S. Trifonov, S. Yokoyama, S. Mahsiko, and T. Okamoto, Tunneling-electron-induced Molecular Luminescence from a Nanoscale Layer of Organic Molecules on Metal Substrates, Appl. Phys. Lett, 84, pp. 969-971 (2004).
117. Z. C. Dong, X. L. Guo, A. S. Trifonov, P. S. Dorozhkin, K. Miki, K. Kimura, S. Yokoyama, and S. Mashiko, Vibrationally Resolved Fluorescence from Organic Molecules Near Metal Surface in a Scanning Tunneling Microscope, Phys. Rev. Let., 92, pp. 86801-4 (2004).
118. T. Sekiguchi, Y. Wakayama, S. Yokoyama, T. Kamikado, and S. Mashiko, Adsorption-induced Conformation Changes of Phorphyrin Derivatives and Formation of Twin Superstructures on a Copper Surface, Thin Solid Films, 464, pp. 393-397 (2004).
119. T. Yokoyama, T. Kamikado, S. Yokoyama, and S. Mashiko, Conformation Selective Assembly of Carboxyphenyl Substituted Porphyrins on Au (111), J. Chem. Phys., 121, pp. 11993-11997 (2004).
120. X. L. Guo, Z. C. Dong, A. S. Trifonov, K. Miki, Y. Wakayama, K. Kimura, S.Yokoyama, and S. Mashiko, Nanoscale Organic Electroluminescence from Tunnel Junctions, Phys. Rev. B, 70, pp. 2332041-4 (2004).