K. YAMASHITA

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学術論文

  1. "Broadband optical amplification of waveguide cut-off mode in polymer waveguide doped with graphene quantum dots", T. Nagafusa, Y. Hara, K. Nishio, T. Isshiki, and K. Yamashita, Advanced Optical Materials, Vol. 10, No. 10, 2200255, Aug. 2022.

  2. "Optically pumped lasing based on vibrationally dressed exciton polariton in single-crystal molecular cavity at room temperature", T. Matsuo, Y. Ueda, H. Mizuno, F. Sasaki, K. Yamashita, and H. Yanagi, ACS Photonics, Vol. 9, No. 6, 2015-2023, Jun. 2022.

  3. "Morphological and functional characterizations of SnO2 electron extraction layer on transparent conductive oxides in lead-halide perovskite solar cells", A. Murota, K. Oka, R. Hayashi, K. Fujiwara, T. Nishida, K. Kobayashi, Y. Numata, and K. Yamashita, Applied Physics Letters, Vol. 120, No. 19, 191604, May. 2022.

  4. "Drastic transitions of excited state and coupling regime in all-inorganic perovskite microcavities characterized by exciton/plasmon hybrid natures", S. Enomoto, T. Tagami, Y. Ueda, Y. Moriyama, K. Fujiwara, S. Takahashi, and K. Yamashita, Light: Science & Applications, Vol. 11, No. 1, 8, Jan. 2022.

  5. "Fabrication of three-dimensional photonic crystals for near-infrared light by micromanipulation technique under optical microscope observation", S. Takahashi, E. Kimura, T. Ishida, T. Tajiri, K. Watanabe, K. Yamashita, S. Iwamoto, and Y. Arakawa, Applied Physics Express, Vol. 15, No. 1, 015001, Dec. 2021.

  6. "Transmission properties of microwaves at an optical Weyl point in a three-dimensional chiral photonic crystal", S. Takahashi, S. Tamaki, K. Yamashita, T. Yamaguchi, T. Ueda, and S. Iwamoto, Optics Express, Vol. 29, No. 17, 27127-27136, Aug. 2021.

  7. "Impact of material parameters on strong exciton?photon coupling states formed in microcrystal resonators of p- and n-type thiophene/phenylene co-oligomers", H. Mizuno, T. Jinjyo, K. Bando, F. Sasaki, K. Yamashita, and H. Yanagi, Journal of Material Chemistry C, Vol. 9, No. 34, 11189-11197, Aug. 2021.

  8. "Anisotropic light-matter coupling and below-threshold excitation dynamics in an organic crystal microcavity", T. Tagami, Y. Ueda, K. Imai, S. Takahashi, H. Mizuno, H. Yanagi, T. Obuchi, M. Nakayama, and K. Yamashita, Optics Express, Vol. 29, No. 17, 26433-26443, Aug. 2021.

  9. "Dry-wet hybrid deposition of wide-bandgap mixed-halide perovskites for tandem solar cell applications", S. Kanbe, J. Kagae, A. Murota, Y. Hara, K. Fujiwara, and K. Yamashita, Applied Physics Letters, Vol. 117, No. 17, 171901, Oct. 2020.

  10. "Comprehensive photophysical properties of thiophene/phenylene co-oligomers investigated by theoretical and experimental studies", J. Kong, W. Zhang, Y. Guo, X. Niu, T. Yamao, K. Yamashita, and A. Xia, The Journal of Physical Chemistry C, Vol. 124, No. 35, 18946-18955, Sep. 2020.

  11. "Excitation dynamics in layered lead halide perovskite crystal slabs and microcavities", K. Fujiwara, S.Zhang, S. Takahashi, L. Ni, A. Rao, and K. Yamashita, ACS Photonics, Vol. 7, No. 3, 845-852, Mar. 2020.

  12. "A polymer film with ultra-broadband optical gain characteristics", Y. Hara, Y. Higase, M. Taguchi, S. Takahashi, F. Sasaki, and K. Yamashita, Applied Physics Letters, Vol. 116, No. 6, 063301, Feb. 2020.

  13. "Compact solid-state organic laser with fine and broadband wavelength tunability", M. Taguchi, Y. Higase, and K. Yamashita, Optics Express, Vol. 27, No. 24/25, 35548-35554, Nov. 2019.

  14. "Strong exciton-photon coupling in organic microcavity electroluminescence devices with thiophene/phenylene co-oligomer derivatives", S. Dokiya, H. Mizuno, H. Mizuno, H. Katsuki, K. Yamashita, F. Sasaki and H. Yanagi, Applied Physics Express, Vol. 12, No. 11, 111002, Nov. 2019.

  15. "Cooperative behaviors in amplified emission from single microcrystals of thiophene/phenylene co-oligomers toward organic polariton laser", H. Yanagi, F. Sasaki, and K. Yamashita, Advanced Optical Materials, Vol. 7, No. 17, 1900136, Sep. 2019.

  16. "Modification of dry/wet hybrid fabrication method for preparing a perovskite absorption layer on a PCBM electron transport layer", J. Kagae, T. Yamanaka, S. Takahashi, and K. Yamashita, RSC Advances, Vol. 8, No. 68, 39047-39052, Nov. 2018.

  17. "Design principle of high-performance organic single-crystal light-emitting devices", T. Yamao, S. Higashihara, S. Yamashita, H. Sano, Y. Inada, K. Yamashita, S. Ura, and S. Hotta, Journal of Applied Physics, Vol. 123, No. 23, 235501, Jun. 2018.

  18. "Ultrafast dynamics of polariton cooling and renormalization in an organic single-crystal microcavity under nonresonant pumping", K. Yamashita, U. Huynh, J. Richter, L. Eyre, F. Deschler, A. Rao, K. Goto, T. Nishimura, T. Yamao, S. Hotta, H. Yanagi, M. Nakayama, and R. H. Friend, ACS Photonics, Vol. 5, No. 6, pp. 2182-2188, Jun. 2018.

  19. "High-gain and wide-band optical amplifications induced by coupled excited state of organic dye molecules co-doped in polymer waveguide", Y. Higase, S. Morita, T. Fujii, S. Takahashi, K. Yamashita, and F. Sasaki, Optics Letters, Vol. 43, No. 8, pp. 1714-1717, Apr. 2018.

  20. "Quantitative evaluation of light-matter interaction parameters in organic single crystal microcavities", T. Nishimura, K. Yamashita, S. Takahashi, T. Yamao, S. Hotta, H. Yanagi, and M. Nakayama, Optics Letters, Vol. 43, No. 5, pp. 1047-1050, Mar. 2018.

  21. "Organic nanowire lasers with epitaxially grown crystals of semiconducting oligomers", K. Torii, T. Higuchi, K. Mizuno, K. Bando, K. Yamashita, F. Sasaki, and H. Yanagi, Chemistry of Nanomaterials, for Energy, Biology, and More, Vol. 3, No. 9, pp.625-631, Aug. 2017.

  22. "Surface-emitting vertical cavity with vapor-grown single crystal of cyano-substututed thiophene/phenylene co-oligomer", R. Hatano, K. Goto, K. Yamashita, F. Sakaki, and H. Yanagi, Japanese Journal of Applied Physics, Vol. 56, No. 4, 04CL02, Jan. 2017.

  23. "Strong exciton-photon coupling in organic single crystal microcavity with high molecular orientation", K. Goto, K. Yamashita, H. Yanagi, T. Yamao, and S. Hotta, Applied Physics Letters, Vol. 109, No. 6, 061101, Aug. 2016.

  24. "Vertical cavity lasing from melt-grown crystals of cyano-substituted thiophene/phenylene co-oligomer", Y. Tanaka, K. Goto, K. Yamashita, T. Yamao, S. Hotta, F. Sasaki, and H. Yanagi, Applied Physics Letters, Vol. 107, No. 16, 163303, Oct. 2015.

  25. "Wavelength tunability of plastic waveguide laser with asymmetric distributed Bragg reflectors", K. Nagai and K. Yamashita, Journal of Lightwave Technology, Vol. 33, No. 22, pp. 4600-4605, Nov. 2015.

  26. "Doping effects of fluorinated organic dyes on the open-circuit voltage of bulk-heterojunction photovoltaic devices", T. Watanabe and K. Yamashita, Japanese Journal of Applied Physics, Vol. 54, No. 8S1, 08KF01, Jun. 2015.

  27. "Polymer optical waveguide composed of europium-aluminum-acrylate composite core for compact optical amplifier and laser", M. Mitani, K. Yamashita, T. Fukui, and T. Ishigure, Proceedings of SPIE, Vol. 9365, , 93650Q, Feb. 2015.

  28. "Wavelength-switchable lasing from a polymer single chip device codoped with organic dyes", K. Nagai, T. Kawaguchi, and K. Yamashita, IEEE Photonics Technology Letters, Vol. 26, No. 17, 1707-1710, Sep. 2014.

  29. "Vertical cavity surface emitting lasing from cyano-substituted thiophene/phenylene co-oligomer single crystals", K. Yamashita, T. Nakahata, T. Hayakawa, Y. Sakurai, T. Yamao, H. Yanagi, and S. Hotta, Applied Physics Letters, Vol. 104, No. 25, 253301, Jun. 2014.

  30. "Photoinduced absorption measurement on a microchip equipped with organic dye-doped polymer waveguide", T. Kawaguchi, K. Nagai, and K. Yamashita, Proceedings of SPIE, Vol. 8774, , 87740Q, May, 2013.

  31. "Optical properties of dye-doped polymer films incorporating photonic nanostructures", K. Egami, T. Nakayama, Y. Kosaka, S. Tomita, A. Ishizumi, H. Yanagi, K. Yamashita, and K. Oe, Physica Status Solidi (c), Vol. 9, No. 12, pp. 2485-2488, Nov. 2012.

  32. "Carrier transport and charge transfer properties in Coumarin-doped bulk-heterojunction materials", T. Watanabe, T. Maeda, K. Yamashita, and H. Yanagi, Physica Status Solidi (c), Vol. 9, No. 12, pp. 2399-2402, Nov. 2012.

  33. "Impact of Coumarin dye doping on photovoltaic properties of bulk heterojunction device", K. Yamashita, T. Watanabe, T. Maeda, and H. Yanagi, Japanese Journal of Applied Physics, Rapid Communication, Vol. 51, No. 8, 080207, Jul., 2012.

  34. "Integrated light sources based on self-formed polymer waveguide doped with active medium", S. Sugimoto, T. Kawaguchi, and K. Yamashita, Proceedings of SPIE, Vol. 8435, , 84351O, Apr., 2012.

  35. "Investigation of carrier collection capability in organic heterostructure with conductive polymer nanofiber", K. Yamashita, T. Maeda, Y. Kusakabe, and M. Kotaki, Japanese Journal of Applied Physics, Rapid Communication, Vol. 50, No. 8, 080204, Aug., 2011.

  36. "Array of a dye-doped polymer-based microlaser with multiwavelength emission", K. Yamashita, H. Yanagi and K. Oe, Optics Letters, Vol. 36, No. 10, pp. 1875-1877, May, 2011.

  37. "Optically end-pumped plastic waveguide laser with in-line Fabry-Perot resonator", K. Yamashita, M. Ito, S. Sugimoto, T. Morishita, and K. Oe, Optics Express, Vol. 18, No. 23, pp. 24092-24100, Nov., 2010.

  38. "1.3 ?m solid-state plastic laser in dye-doped fluorinated-polyimide waveguide", T. Morishita, K. Yamashita, H. Yanagi, and K. Oe, Applied Physics Express, Vol. 3, No. 9, 092202, Sep., 2010.

  39. "Simultaneous RGB lasing from a single-chip polymer device", K. Yamashita, N. Takeuchi, K. Oe, and H. Yanagi, Optics Letters, Vol. 35, No. 14, pp. 2451-2453, Jul., 2010.

  40. "Surface-emitting dye-doped polymer laser coupled with stimulated resonant Raman scattering", H. Yanagi, H. Miyamoto, A. Ishizumi, S. Tomita, K. Yamashita, and K. Oe, Applied Physics Letters, Vol. 96, No. 26, 263304, Jul., 2010.

  41. "Fiber-to-fiber optical gain of polymer-based amplifier with self-written active waveguide", K. Yamashita, E. Fukuzawa, H. Okada, and K. Oe, Japanese Journal of Applied Physics, Vol. 48, No. 10, 102406, Oct., 2009.

  42. "Device parameter analyses of solid-state organic laser made by self-written active waveguide technique", K. Yamashita, M. Ito, E. Fukuzawa, H. Okada, and K. Oe, Journal of Lightwave Technology, Vol. 27, No. 20, pp. 4570-4574, Oct., 2009.

  43. "Solid-state organic DFB laser in near-infrared wavelength region", S. Yuyama, T. Watanabe, K. Yamashita, and K. Oe, Proceedings of SPIE, Vol. 7415, , 741517, Aug., 2009.

  44. "Dye-doped polymer microring laser coupled with stimulated resonant Raman scattering", H. Yanagi, R. Takeaki, S. Tomita, A. Ishizumi, F. Sasaki, K. Yamashita, and K. Oe, Applied Physics Letters, Vol. 95, No. 3, 033306, Jul., 2009.

  45. "Distributed feedback lasing coupled with stimulated resonant Raman scattering in polyphenylenevinylene films", H. Yanagi, N. Kawazu, R. Takeaki, S. Tomita, K. Yamashita, and K. Oe, Synthetic Metals, Vol. 159, No. 9-10, pp. 802-804, May, 2009.

  46. "Amplification properties of Tb(III) green emission in polymeric waveguide doped with Tb-Al nanocluster", K. Yamashita, N. Takeuchi, H. Taniguchi, S. Yuyama, K. Oe, N. Mibuka, A. Suzuki, and H. Mataki, Journal of Luminescence, Vol. 129, No. 5, pp. 526-530, May, 2009.

  47. "Multilayered solid-state organic laser for simultaneous multiwavelength oscillations", K. Yamashita, M. Arimatsu, N. Takeuchi, M. Takayama, K. Oe, and H. Yanagi, Applied Physics Letters, Vol. 93, No. 23, 233303, Dec., 2008.

  48. "Solid-state organic laser emission at 970 nm from dye-doped fluorinated-polyimide planer waveguides", S. Yuyama, T. Nakajima, K. Yamashita, and K. Oe, Applied Physics Letters, Vol. 93, No. 2, 023306, Jul., 2008.

  49. "Simple fabrication technique of distributed-feedback polymer laser by direct photo nanoimprint lithography", K. Yamashita, M. Arimatsu, M. Takayama, K. Oe, and H. Yanagi, Applied Physics Letters, Vol. 92, No. 24, 243306, Jun., 2008.

  50. "Solid-state organic laser using self-written active waveguide with in-line Fabry-Perot cavity", K. Yamashita, A. Kitanobou, M. Ito, E. Fukuzawa, and K. Oe, Applied Physics Letters, Vol. 92, No. 14, 143305, Apr., 2008.

  51. "Self-written active waveguide for integrated optical amplifiers", K. Yamashita, E. Fukuzawa, A. Kitanobou, and K. Oe, Applied Physics Letters, Vol. 92, No. 5, 051102, Feb., 2008.

  52. "Continuous-wave stimulated emission and optical amplification in europium (III)-aluminum nanocluster-doped polymeric waveguide", K. Yamashita, H. Taniguchi, S. Yuyama, K. Oe, J. Sun, and H. Mataki, Applied Physics Letters, Vol. 91, No. 8, 081115, Aug., 2007.

  53. "Optical amplification in organic dye-doped polymeric channel waveguide under CW optical pumping", K. Yamashita, K. Hase, H. Yanagi, and K. Oe, Japanese Journal of Applied Physics, Vol. 46, No. 28, pp. L688-L690, Jul., 2007.

  54. "Polymer waveguide optical amplifier using organic/inorganic nanocomposites doped with rare-earth-metal nanoclusters", H. Mataki, K. Tsuchii, N. Mibuka, A. Suzuki, J. Sun, H. Taniguchi, K. Yamashita, and K. Oe, Journal of Photopolymer Science and Technology, Vol. 20, No. 1, pp. 67-72, May, 2007.

  55. "Anisotropic optical transitions in [110]-oriented semiconductor quantum well studied by photoreflectance spectroscopy", K. Yamashita, H. Asai, and K. Oe, Japanese Journal of Applied Physics, Vol. 46, No. 4, pp. 1536-1539, Apr., 2007.

  56. "High-gain optical amplification of europium (Eu3+)- aluminum (Al) nanocluster doped planar polymer waveguides", H. Mataki, K. Tsuchii, J. Sun, H. Taniguchi, K. Yamashita, and K. Oe, Japanese Journal of Applied Physics, Vol. 46, No. 3, pp. L83-L85, Jan., 2007.

  57. "Low threshold amplified spontaneous emission from near-infrared dye-doped polymeric waveguide", K. Yamashita, T. Kuro, K. Oe, and H. Yanagi, Applied Physics Letters, Vol. 88, No. 24, 241110, Jun., 2006.

  58. "Near infrared light amplification in dye-doped polymer waveguide", S. Fujimoto, I. Sakata, H. Yanagi, K. Yamashita, and K. Oe, Japanese Journal of Applied Physics, Vol. 45, No. 12, pp. L355-L357, Apr., 2006.

  59. "Temperature-insensitive refractive index of GaAsBi alloy for laser diode in WDM optical communication", K. Yamashita, M. Yoshimoto, and K. Oe, Physica Status Solidi (c), Vol. 3, No. 3, pp. 693-696, Feb., 2006.

  60. "Electronic structure of ordered Ga0.5In0.5P/GaAs heterointerface studied by Raman-scattering and photoluminescence-excitation measurements", K. Yamashita, K. Oe, T. Kita, O. Wada, Y. Wang, C. Geng, F. Scholz, and H. Schweizer, Japanese Journal of Applied Physics, Vol. 44, No. 10, pp. 7390-7394, Oct., 2005.

  61. "Propagation-mode-controlled fabrication of self-written waveguide in photosensitive polyimide for singlemode operation", K. Yamashita, T. Kuro, K. Oe, K. Mune, T. Hikita, and A. Mochizuki, IEEE Photonics Technology Letters, Vol. 17, No. 4, pp. 786-788, Apr., 2005.

  62. "Fabrication of self-written waveguide in photosensitive polyimide resin by controlling photochemical reaction of photosensitizer", K. Yamashita, T. Kuro, K. Oe, K. Mune, T. Tagawa, R. Naitou, and A. Mochizuki, Applied Physics Letters, Vol. 85, No. 18, pp. 3962-3964, Nov., 2004.

  63. "New fabrication method of self-written waveguide by using photosensitive polyimide", K. Mune, A. Mochizuki, R. Naitou, K. Tagawa, Y. Shimizu, K. Yamashita, and K. Oe, Journal of Photopolymer Science and Technology, Vol. 17, No. 2, pp. 189-193, Apr., 2004.

  64. "Self-written waveguide structure in photosensitive polyimide resin fabricated by exposure and thermosetting process", K. Yamashita, T. Hashimoto, K. Oe, K. Mune, R. Naitou, and A. Mochizuki, IEEE Photonics Technology Letters, Vol. 16, No. 3, pp. 801-803, Mar., 2004.

  65. "Magnetophotoluminescence study of Ga0.5In0.5P/GaAs heterointerface with ordering-induced two-dimensional electron gas", K. Yamashita, T. Kita, Y. Matsuura, O. Wada, C. Geng, F. Scholz, H. Schweizer, and K. Oe, Physical Review B, Vol. 66, No. 19, 195317, Nov., 2002.

  66. "Two-dimensional electron gas at Ga0.5In0.5P/GaAs heterointerface spontaneously induced by atomic ordering", K. Yamashita, T. Kita, Y. Wang, K. Murase, C. Geng, F. Scholz, and H. Schweizer, Physica E, Vol. 13, No. 2-4, pp. 329-332, Mar., 2002.

  67. "Stranski-Krastanov growth of (In,Ga)As quantum dots by controlling the wetting layer", T. Kita, M. Nakahama, K. Yamashita, and O. Wada, Institute of Physics Conference Series, , No. 170, pp. 525-530, 2002.

  68. "Inelastic phonon scattering in long-range ordered (Al0.5Ga0.5)0.5In0.5P", T. Kita, K. Yamashita, T. Nishino, Y. Wang, and K. Murase, Physical Review B, Vol. 63, No. 12, 125210, Jun., 2001.

  69. "Cooling process of hot excitons in ordered Ga0.5In0.5P", T. Kita, M. Sakurai, K. Yamashita, T. Nishino, C. Geng, F. Scholz, and H. Schweizer, Japanese Journal of Applied Physics, Vol. 39, Suppl. 39, pp. 328-329, Dec., 2000.

  70. "Self-assembled growth of InAs-quantum dots and postgrowth behavior studied by reflectance-difference spectroscopy", T. Kita, K. Tachikawa, H. Tango, K. Yamashita, and T. Nishino, Applied Surface Science, Vol. 159-160, , pp. 503-507, Jul., 2000.

  71. "Initial stage of InAs-quantum dot formation study by reflectance-difference spectroscopy and photoluminescence", K. Yamashita, T. Kita, and T. Nishino, Institute of Physics Conference Series, , No. 166, pp. 239-242, 2000.

  72. "Dynamic process of two-dimensional InAs growth in Stranski-Krastanov mode", T. Kita, K. Yamashita, H. Tango, and T. Nishino, Physica E, Vol. 7, No. 3-4, pp. 891-895, May, 2000.

  73. "Linear electrooptic effect in ordered (Al0.5Ga0.5)0.5In0.5P", K. Yamashita, T. Kita, and T. Nishino, Journal of Applied Physics, Vol. 86, No. 6, pp. 3140-3143, Sep., 1999.

  74. "Self-organized process of InAs-quantum dots monitored by reflectance difference spectroscopy", T. Kita, T. Hagihara, K. Yamashita, and T. Nishino, Institute of Physics Conference Series, , No. 162, pp. 457-462, 1999.

  75. "Carrier-relaxation process in time-resolved up-converted photoluminescence at ordered (Al0.5Ga0.5)0.51In0.49P and GaAs heterointerface", K. Yamashita, T. Kita, T. Nishino, and M. Oestreich, Japanese Journal of Applied Physics, Vol. 38, No. 2, pp. 1001-1003, Feb., 1999.

  76. "Carrier localization effects in energy up conversion at ordered (Al0.5Ga0.5)0.5In0.5P/GaAs", K. Yamashita, T. Kita, and T. Nishino, Journal of Applied Physics, Vol. 84, No. 1, pp. 359-363, Jul., 1998.

  77. "Spin polarization of exciton luminescence from ordered Ga0.5In0.5P", T. Kita, M. Sakurai, K. Bhattacharya, K. Yamashita, T. Nishino, C. Geng, F. Scholz, and H. Schweizer, Physical Review B, Vol. 57, No. 24, pp. 15044-15047, Jun., 1998.

  78. "Photoluminescence from metastable states in long-range ordered (Al0.5Ga0.5)0.51In0.49P", K. Yamashita, T. Kita, H. Nakayama, and T. Nishino, Physical Review B, Vol. 55, No. 7, pp. 4411-4416, Feb., 1997.

  79. "Higher-interband electroreflectance of long-range ordered Ga0.5In0.5P", T. Kita, K. Yamashita, and T. Nishino, Physical Review B, Vol. 54, No. 23, pp. 16714-16718, Dec., 1996.

  80. "Direct optical transition in indirect-gap (Al0.5Ga0.5)0.51In0.49P by atomic ordering", K. Yamashita, T. Kita, H. Nakayama, and T. Nishino, Physical Review B, Vol. 53, No. 23, pp. 15713-15718, Jun., 1996.

　

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