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  Ultracompact, 160-Gbit/s transmitter optical subassembly based on 40-Gbit/s × 4 monolithically integrated light source

  Fujisawa, T., Itoh, T., Kanazawa, S., Takahata, K., Ueda, Y., Iga, R., Sanjo, H., Yamanaka, T., Kotoku, M. & Ishii, H., 2013 Jan 14, In: Optics Express. 21, 1, p. 182-189 8 p.

  Research output: Contribution to journal › Article › peer-review
  14 Citations (Scopus)

• Ultra-compact 100 GbE transmitter optical sub-assembly for 40-km SMF transmission

  Kanazawa, S., Fujisawa, T., Nunoya, N., Ohki, A., Takahata, K., Sanjoh, H., Iga, R. & Ishii, H., 2013, In: Journal of Lightwave Technology. 31, 4, p. 602-608 7 p., 6302159.

  Research output: Contribution to journal › Article › peer-review
  49 Citations (Scopus)

• Ultracompact Compton camera for innovative gamma-ray imaging

  Kataoka, J., Kishimoto, A., Taya, T., Mochizuki, S., Tagawa, L., Koide, A., Sueoka, K., Morita, H., Maruhashi, T., Fujieda, K., Kurihara, T., Arimoto, M., Okochi, H., Katsumi, N., Kinno, S., Matsunaga, K., Ikeda, H., Shimosegawa, E., Hatazawa, J., Ohsuka, S., & 6 othersToshito, T., Kimura, M., Nagao, Y., Yamaguchi, M., Kurita, K. & Kawachi, N., 2018 Dec 21, In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 912, p. 1-5 5 p.

  Research output: Contribution to journal › Article › peer-review
  13 Citations (Scopus)

• Ultra-compact wavelength-tunable quantum-dot laser with silicon-photonics double ring filter

  Kita, T., Yamamoto, N., Kawanishi, T. & Yamada, H., 2015 Jun 1, In: Applied Physics Express. 8, 6, 062701.

  Research output: Contribution to journal › Article › peer-review
  23 Citations (Scopus)

• Ultra-conformable Organic Field-Effect Transistors and circuits for epidermal electronic applications

  Lai, S., Zucca, A., Cosseddu, P., Greco, F., Mattoli, V. & Bonfiglio, A., 2017 Jul 1, In: Organic Electronics: physics, materials, applications. 46, p. 60-67 8 p.

  Research output: Contribution to journal › Article › peer-review
  41 Citations (Scopus)

• Ultra-dense spatial-division-multiplexed optical fiber transmission over 6-mode 19-core fibers

  Igarashi, K., Soma, D., Wakayama, Y., Takeshima, K., Kawaguchi, Y., Yoshikane, N., Tsuritani, T., Morita, I. & Suzuki, M., 2016 May 16, In: Optics Express. 24, 10, p. 10213-10231 19 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  66 Citations (Scopus)

• Ultradiscrete bifurcations for one dimensional dynamical systems

  Ohmori, S. & Yamazaki, Y., 2020 Dec 1, In: Journal of Mathematical Physics. 61, 12, 122702.

  Research output: Contribution to journal › Article › peer-review
  2 Citations (Scopus)

• Ultradiscrete Hamiltonian systems

  Iwao, M. & Takahashi, D., 2005 Jun, In: Glasgow Mathematical Journal. 47 A, p. 87-97 11 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  1 Citation (Scopus)

• Ultradiscrete Plücker relation specialized for soliton solutions

  Nagai, H. & Takahashi, D., 2011 Mar 4, In: Journal of Physics A: Mathematical and Theoretical. 44, 9, 095202.

  Research output: Contribution to journal › Article › peer-review
  4 Citations (Scopus)

• Ultradiscrete QRT maps and tropical elliptic curves

  Nobe, A., 2008 Mar 28, In: Journal of Physics A: Mathematical and Theoretical. 41, 12, 125205.

  Research output: Contribution to journal › Article › peer-review
  15 Citations (Scopus)

• Ultradiscrete soliton solution of permanent type

  Takahashi, D. & Hirota, R., 2007 Oct 1, In: journal of the physical society of japan. 76, 10, 104007.

  Research output: Contribution to journal › Article › peer-review
  22 Citations (Scopus)

• Ultradiscretization of a solvable two-dimensional chaotic map associated with the hesse cubic curve

  Kajiwara, K., Kaneko, M., Nobe, A. & Tsuda, T., 2009 Oct 30, In: Kyushu Journal of Mathematics. 63, 2, p. 315-338 24 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  5 Citations (Scopus)

• Ultradiscretization of elliptic functions and its applications to integrable systems

  Nobe, A., 2006 May 19, In: Journal of Physics A: Mathematical and General. 39, 20, p. L335-L342

  Research output: Contribution to journal › Article › peer-review
  5 Citations (Scopus)

• Ultradiscretization of solvable one-dimensional chaotic maps

  Kajiwara, K., Nobe, A. & Tsuda, T., 2008 Oct 3, In: Journal of Physics A: Mathematical and Theoretical. 41, 39, 395202.

  Research output: Contribution to journal › Article › peer-review
  5 Citations (Scopus)

• Ultradiscretization of the Tzitzeica equation

  Hirota, R. & Takahashi, D., 2005 Jun, In: Glasgow Mathematical Journal. 47 A, p. 77-85 9 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  7 Citations (Scopus)

• Ultrafast all-optical digital comparator using quantum-dot semiconductor optical amplifiers

  Komatsu, K., Hosoya, G. & Yashima, H., 2019 Feb 1, In: Optical and Quantum Electronics. 51, 2, 39.

  Research output: Contribution to journal › Article › peer-review
  11 Citations (Scopus)

• Ultrafast all-optical modulation by near-infrared intersubband transition in n-doped InGaAs/AlAsSb quantum wells

  Neogi, A., Yoshida, H., Mozume, T., Georgiev, N., Akiyama, T., Tackeuchi, A. & Wada, O., 2001 Jul, In: Optical and Quantum Electronics. 33, 7-10, p. 975-983 9 p.

  Research output: Contribution to journal › Article › peer-review
  6 Citations (Scopus)

• Ultrafast all-optical spin polarization switch using quantum-well etalon

  Nishikawa, Y., Tackeuchi, A., Yamaguchi, M., Muto, S. & Wada, O., 1996 Sep, In: IEEE Journal on Selected Topics in Quantum Electronics. 2, 3, p. 661-667 7 p.

  Research output: Contribution to journal › Article › peer-review
  61 Citations (Scopus)

• Ultrafast all-optical switching by cross-absorption modulation in silicon wire waveguides

  Liang, T. K., Nunes, L. R., Sakamoto, T., Sasagawa, K., Kawanishi, T., Tsuchiya, M., Priem, G. R. A., Van Thourhout, D., Dumon, P., Baets, R. & Tsang, H. K., 2005 Sep 19, In: Optics Express. 13, 19, p. 7298-7303 6 p.

  Research output: Contribution to journal › Article › peer-review
  130 Citations (Scopus)

• Ultrafast and broadband frequency chirp signal generation using a high-extinction-ratio optical modulator

  Kanno, A., Honda, S., Yamanaka, R., Sotobayashi, H. & Kawanishi, T., 2010 Dec 15, In: Optics Letters. 35, 24, p. 4160-4162 3 p.

  Research output: Contribution to journal › Article › peer-review
  24 Citations (Scopus)

• Ultrafast Charge/Discharge by a 99.9% Conventional Lithium Iron Phosphate Electrode Containing 0.1% Redox-Active Fluoflavin Polymer

  Hatakeyama-Sato, K., Akahane, T., Go, C., Kaseyama, T., Yoshimoto, T. & Oyaizu, K., 2020 May 8, In: ACS Energy Letters. 5, 5, p. 1712-1717 6 p.

  Research output: Contribution to journal › Article › peer-review
  14 Citations (Scopus)

• Ultrafast Electronic Band Gap Control in an Excitonic Insulator

  Mor, S., Herzog, M., GoleŽ, D., Werner, P., Eckstein, M., Katayama, N., Nohara, M., Takagi, H., Mizokawa, T., Monney, C. & Stähler, J., 2017 Aug 23, In: Physical Review Letters. 119, 8, 086401.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  112 Citations (Scopus)

• Ultrafast energy relaxation and anisotropy decay of the librational motion in liquid water: A molecular dynamics study

  Yagasaki, T., Ono, J. & Saito, S., 2009, In: Journal of Chemical Physics. 131, 16, 164511.

  Research output: Contribution to journal › Article › peer-review
  35 Citations (Scopus)

• Ultrafast exciton spin relaxation in GaAs/AlGaAs and CdMnTe multiple quantum wells

  Takagi, Y., Adachi, S., Takeyama, S., Tackeuchi, A., Muto, S. & Dubowski, J. J., 1994 Jan, In: Journal of Luminescence. 58, 1-6, p. 202-205 4 p.

  Research output: Contribution to journal › Article › peer-review
  7 Citations (Scopus)

• Ultrafast Growth of a Cu(OH)₂-CuO Nanoneedle Array on Cu Foil for Methanol Oxidation Electrocatalysis

  Anantharaj, S., Sugime, H. & Noda, S., 2020 Jun 17, In: ACS Applied Materials and Interfaces. 12, 24, p. 27327-27338 12 p.

  Research output: Contribution to journal › Article › peer-review
  60 Citations (Scopus)

• Ultrafast monolithic receiver OEIC composed of multimode waveguide p-i-n photodiode and HEMT distributed amplifier

  Takahata, K., Muramoto, Y., Fukano, H., Kato, K., Kozen, A., Kimura, S., Imai, Y., Miyamoto, Y., Nakajima, O. & Matsuoka, Y., 2000 Jan, In: IEEE Journal on Selected Topics in Quantum Electronics. 6, 1, p. 31-37 7 p.

  Research output: Contribution to journal › Article › peer-review
  23 Citations (Scopus)

• Ultrafast monolithic receiver OEIC module operating at over 40Gbit/s

  Takahata, K., Miyamoto, Y., Muramoto, Y., Fukano, H. & Matsuoka, Y., 1999 Feb 18, In: Electronics Letters. 35, 4, p. 322-324 3 p.

  Research output: Contribution to journal › Article › peer-review
  11 Citations (Scopus)

• Ultrafast near-field microscope imaging of electron and phonon relaxation in single gold nanoparticle

  Imura, K., Nagahara, T. & Okamoto, H., 2004 Dec 1, In: Springer Series in Chemical Physics. 79, p. 655-657 3 p.

  Research output: Contribution to journal › Article › peer-review

• Ultrafast operation of Si thermo-optic switch using differential control method

  Iino, K. & Kita, T., 2023 Jan 1, In: Japanese journal of applied physics. 62, 1, 012002.

  Research output: Contribution to journal › Article › peer-review

• Ultrafast optical packet processing technologies based on novel hybrid optoelectronic devices

  Takenouchi, H., Nakahara, T., Takahata, K. & Takahashi, R., 2004 Jul 1, In: NTT Technical Review. 2, 7, p. 47-56 10 p.

  Research output: Contribution to journal › Article › peer-review
  1 Citation (Scopus)

• Ultrafast optical sampling pump-probe measurement of exciton spin relaxation in GaAs/AlGaAs quantum wells

  Adachi, S., Takeyama, S., Takagi, Y., Tackeuchi, A. & Muto, S., 1996, In: Applied Physics Letters. 68, 7, p. 964-966 3 p.

  Research output: Contribution to journal › Article › peer-review
  18 Citations (Scopus)

• Ultrafast optical sampling spectroscopy of exciton dynamics in quantum wells

  Adachi, S., Takeyama, S., Takagi, Y., Tackeuchi, A. & Muto, S., 1996, In: Progress in Crystal Growth and Characterization of Materials. 33, 1-3, p. 117-120 4 p.

  Research output: Contribution to journal › Article › peer-review
  1 Citation (Scopus)

• Ultrafast optoelectronic packet processing for asynchronous, optical-packet-switched networks [Invited]

  Takahashi, R., Nakahara, T., Takahata, K., Takenouchi, H., Yasui, T., Kondo, N. & Suzuki, H., 2004, In: Journal of Optical Networking. 3, 12, p. 914-930 17 p.

  Research output: Contribution to journal › Article › peer-review
  77 Citations (Scopus)

• Ultrafast photoinduced changes of eigenfunctions of localized plasmon modes in gold nanorods

  Imura, K. & Okamoto, H., 2008 Jan 2, In: Physical Review B - Condensed Matter and Materials Physics. 77, 4, 041401.

  Research output: Contribution to journal › Article › peer-review
  19 Citations (Scopus)

• Ultrafast photoinduced electron transfer in face-to-face charge-transfer π-complexes of planar porphyrins and hexaazatriphenylene derivatives

  Aoki, T., Sakai, H., Ohkubo, K., Sakanoue, T., Takenobu, T., Fukuzumi, S. & Hasobe, T., 2015 Feb 1, In: Chemical Science. 6, 2, p. 1498-1509 12 p.

  Research output: Contribution to journal › Article › peer-review
  32 Citations (Scopus)

• Ultrafast production of silicon via aluminothermic reduction of tetrachlorosilane in a thermal plasma jet

  Shinoda, K., Murakami, H., Sawabe, Y. & Saegusa, K., 2012 Aug 1, In: Chemical Engineering Journal. 198-199, p. 61-64 4 p.

  Research output: Contribution to journal › Article › peer-review
  7 Citations (Scopus)

• Ultrafast response of plasmalike reflectivity edge in (TMTTF)2As F6 driven by a 7-fs 1.5-cycle strong-light field

  Naitoh, Y., Kawakami, Y., Ishikawa, T., Sagae, Y., Itoh, H., Yamamoto, K., Sasaki, T., Dressel, M., Ishihara, S., Tanaka, Y., Yonemitsu, K. & Iwai, S., 2016 Apr 19, In: Physical Review B. 93, 16, 165126.

  Research output: Contribution to journal › Article › peer-review
  14 Citations (Scopus)

• Ultrafast Silicon MZI Optical Switch with Periodic Electrodes and Integrated Heat Sink

  Kita, T. & Mendez-Astudillo, M., 2021 Aug 1, In: Journal of Lightwave Technology. 39, 15, p. 5054-5060 7 p., 9439190.

  Research output: Contribution to journal › Article › peer-review
  6 Citations (Scopus)

• Ultrafast time-resolved single-shot birefringence microscopy for laser-induced anisotropy

  Terasawa, E., Satoh, D., Maru, S., Shibuya, T., Moriai, Y., Ogawa, H., Tanaka, M., Sakaue, K., Washio, M., Kobayashi, Y. & Kuroda, R., 2022 Aug 1, In: Optics Letters. 47, 15, p. 3728-3731 4 p.

  Research output: Contribution to journal › Article › peer-review

• Ultra-fine metal gate operated graphene optical intensity modulator

  Kou, R., Hori, Y., Tsuchizawa, T., Warabi, K., Kobayashi, Y., Harada, Y., Hibino, H., Yamamoto, T., Nakajima, H. & Yamada, K., 2016 Dec 19, In: Applied Physics Letters. 109, 25, 251101.

  Research output: Contribution to journal › Article › peer-review
  9 Citations (Scopus)

• Ultraflexible near-infrared organic photodetectors for conformal photoplethysmogram sensors

  Park, S., Fukuda, K., Wang, M., Lee, C., Yokota, T., Jin, H., Jinno, H., Kimura, H., Zalar, P., Matsuhisa, N., Umezu, S., Bazan, G. C. & Someya, T., 2018 Aug, In: Advanced Materials. 30, 34, 1802359.

  Research output: Contribution to journal › Article › peer-review
  142 Citations (Scopus)

• Ultra-high-density magnetic information storage technologies

  Ohashi, K., Ishiwata, N., Yanagisawa, M., Sato, A., Tsuboi, S. & Hokkyo, H., 2000 Apr 1, In: NEC Research and Development. 41, 2, p. 160-165 6 p.

  Research output: Contribution to journal › Article › peer-review

• Ultrahigh oxygen-scavenging norbornene copolymers bearing imidazolyl iron complexes for fabricating active and sustainable packaging films

  Wang, Y., Hasegawa, Y., Serikawa, T., Oyaizu, K. & Nishide, H., 2020, In: Chemical Communications. 56, 6, p. 964-967 4 p.

  Research output: Contribution to journal › Article › peer-review
  3 Citations (Scopus)

• Ultrahigh-pressure form of Si O2 glass with dense pyrite-type crystalline homology

  Murakami, M., Kohara, S., Kitamura, N., Akola, J., Inoue, H., Hirata, A., Hiraoka, Y., Onodera, Y., Obayashi, I., Kalikka, J., Hirao, N., Musso, T., Foster, A. S., Idemoto, Y., Sakata, O. & Ohishi, Y., 2019 Jan 29, In: Physical Review B. 99, 4, 045153.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  32 Citations (Scopus)

• Ultrahigh-resolution Cerenkov-light imaging system for positron radionuclides: potential applications and limitations

  Yamamoto, S., Watabe, T., Ikeda, H., Kanai, Y., Watabe, H., Ogata, Y., Kato, K. & Hatazawa, J., 2014 Nov 27, In: Annals of Nuclear Medicine. 28, 10, p. 961-969 9 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  7 Citations (Scopus)

• Ultrahigh-resolution laser photoemission study of URu₂Si ₂ across the hidden-order transition

  Yoshida, R., Nakamura, Y., Fukui, M., Haga, Y., Yamamoto, E., Nuki, Y., Okawa, M., Shin, S., Hirai, M., Muraoka, Y. & Yokoya, T., 2011 May, In: Journal of Physics and Chemistry of Solids. 72, 5, p. 580-581 2 p.

  Research output: Contribution to journal › Article › peer-review
  3 Citations (Scopus)

• Ultra-high resolution of radiocesium distribution detection based on Cherenkov light imaging

  Yamamoto, S., Ogata, Y., Kawachi, N., Suzui, N., Yin, Y. G. & Fujimaki, S., 2015 Mar 21, In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 777, p. 102-109 8 p.

  Research output: Contribution to journal › Article › peer-review
  3 Citations (Scopus)

• Ultrahigh resolution radiation imaging system using an optical fiber structure scintillator plate

  Yamamoto, S., Kamada, K. & Yoshikawa, A., 2018 Dec 1, In: Scientific reports. 8, 1, 3194.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  18 Citations (Scopus)

• Ultrahigh-resolution spectrometer based on 19 integrated gratings

  Jiang, A. Q., Zang, K. Y., Tu, H. T., Chen, J. K., Lu, W. J., Yoshie, O., Wang, X. P., Xiang, X. D., Lee, Y. P., Chen, B., Zheng, Y. X., Wang, S. Y., Zhao, H. B., Yang, Y. M. & Chen, L. Y., 2019 Dec 1, In: Scientific reports. 9, 1, 10211.

  Research output: Contribution to journal › Article › peer-review

  Open Access
  5 Citations (Scopus)

• Ultrahigh-resolution spin-resolved photoemission spectrometer with a mini Mott detector

  Souma, S., Takayama, A., Sugawara, K., Sato, T. & Takahashi, T., 2010 Sep, In: Review of Scientific Instruments. 81, 9, 095101.

  Research output: Contribution to journal › Article › peer-review
  34 Citations (Scopus)