量子光デバイス研究グループ

研究テーマ・分野

励起子のコヒーレント操作や光電界の精密制御技術を研究しています。光の粒子性と波動性それぞれを制御する手法を開発し、光情報処理技術に変革をもたらす技術の開発を目指します。

メッセージ

眞田 治樹
グループリーダ
眞田 治樹

モード同期レーザの隣接パルス間のキャリアエンベロープ位相（包絡線に対する光搬送波の位相：CEP）のスリップ量はキャリアエンベロープオフセット（CEO）と呼ばれる。近年のモード同期レーザ技術の著しい進展は、CEOの固定を可能とし、超短パルスレーザ電界の制御性を高度化した。また、モード同期レーザのCEO固定は、高確度光周波数コムの実現を意味し、光周波数計量に飛躍的進歩をもたらした。この超高確度な光周波数コムを小型化、高繰り返し化して、1本1本の光コムを個別に自在制御することが可能となれば、超精密分光や次世代コヒーレント通信等の新たな応用分野が飛躍的に広がる。そのためには、CEO固定に要するパルスエネルギーの低減が重要課題である。我々は、帯域1オクターブ以上のスーパーコンティニューム光発生の低エネルギー閾値化とCEO検出に必要な第二高調波発生の高効率化に着目し、高非線形分散シフトテルライトフォトニック結晶ファイバとPPLNリッジ導波路を使用した。その結果、従来記録600 pJを上回る、230 pJの低い入力パルスエネルギーでのCEO固定に成功した。

メンバー

小栗 克弥

小栗　克弥

Dr. Guoqiang Zhang

Dr. Guoqiang Zhang

赤塚 友哉

赤塚 友哉

日達　研一

日達　研一

Dr. Xuejun Xu

Dr. Xuejun Xu

国橋 要司

国橋 要司

今井 弘光

今井 弘光

田中 祐輔

田中 祐輔

稲葉 智宏

稲葉 智宏

岡本 拓也

岡本 拓也

篠原　康

篠原　康

永井　恒平

永井　恒平

Dr. Giacomo Mariani

Dr. Giacomo Mariani

このグループのトピックス

Press Release

Publications

Publications in 2020

  1. H. Mashiko, M. C. Chen, K. Asaga, A. Oshima, I. Katayama, J. Takeda, T. Nishikawa, and K. Oguri

    Spatially resolved spectral phase interferometry with an isolated attosecond pulse

    Opt. Express 28 (14) 21025-21034 (2020).

  2. K. Sasaki, and K. Hitachi

    Universal layer number in graphite

    Commun. Phys. 3 (1), 90 (2020).

  3. X. J. Xu, V. Fili, W. Szuba, M. Hiraishi, T. Inaba, T. Tawara, H. Omi, and H. Gotoh

    Epitaxial single-crystal rare-earth oxide in horizontal slot waveguide for silicon-based integrated active photonic devices

    Opt. Express 28 (10) 14448-14460 (2020).

  4. Y. Sekine, H. Hibino, K. Oguri, A. Iwamoto, M. Nagase, H. Kageshima, and T. Akazaki

    Surface-enhanced Raman scattering from buffer layer under graphene on SiC in a wide energy range from visible to near-infrared

    Jpn. J. Appl. Phys. 59 (4), 040902 (2020).

  5. T. Akatsuka, T. Goh, H. Imai, K. Oguri, A. Ishizawa, I. Ushijima, N. Ohmae, M. Takamoto, H. Katori, T. Hashimoto, H. Gotoh, and T. Sogawa

    Optical frequency distribution using laser repeater stations with planar lightwave circuits

    Opt. Express 28 (7) 9186-9197 (2020).

  6. K. Kato, H. Mashiko, Y. Kunihashi, H. Omi, H. Gotoh, and K. Oguri

    Highly sensitive transient reflection measurement in extreme ultraviolet region for tracking carrier and coherent phonon dynamics

    Opt. Express 28 (2) 1595-1602 (2020).

  7. H. Sanada, A. M. Stramma, Y. Kunihashi, Y. Tanaka, H. Gotoh, K. Onomitsu, F. Tagarelli, M. Kohda, J. Nitta, and T. Sogawa

    Spin accumulation in photo-induced potential dimples generated in semiconductors

    Commun. Phys. 3 (1), 11 (2020).

  1. H. Sumikura, G. Q. Zhang, M. Takiguchi, N. Takemura, A. Shinya, H. Gotoh, and M. Notomi

    Mid-Infrared Lasing of Single Wurtzite InAs Nanowire

    Nano Lett. 19 (11) 8059-8065 (2019).

  2. M. Hiraishi, M. IJspeert, T. Tawara, S. Adachi, R. Kaji, H. Omi, and H. Gotoh

    Optical coherent transients in Er-167(3+) at telecom-band wavelength

    Opt. Lett. 44 (20) 4933-4936 (2019).

  3. Y. Yonezu, R. Kou, H. Nishi, T. Tsuchizawa, K. Yamada, T. Aoki, A. Ishizawa, and N. Matsuda

    Evaluation of graphene optical nonlinearity with photon-pair generation in graphene-on-silicon waveguides

    Opt. Express 27 (21) 30262-30271 (2019).

  4. R. Kou, N. Yamamoto, G. Fujii, T. Aihara, T. Tsuchizawa, A. Ishizawa, K. Hitachi, H. Gotoh, M. Ukibe, and K. Yamada

    Spectrometric analysis of silicon nitride films deposited by low-temperature liquid-source CVD

    J. Appl. Phys. 126 (13), 133101 (2019).

  5. P. L. Helgers, H. Sanada, Y. Kunihashi, A. Rubino, C. J. Ford, K. Biermann, and P. V. Santos

    Sidewall Quantum Wires on GaAs(001) Substrates

    Phys. Rev. Appl. 11 (6), 064017 (2019).

  6. H. Okamoto, K. Takita, K. Tsushima, T. Tawara, K. Tateno, G. Q. Zhang, and H. Gotoh

    Low-temperature formation of GeSn nanodots by Sn mediation

    Jpn. J. Appl. Phys. 58, SDDG09 (2019).

  7. K. Tsushima, K. Takita, H. Nakazawa, T. Tawara, K. Tateno, G. Q. Zhang, H. Gotoh, and H. Okamoto

    Study on the formation mechanism of bismuth-mediated Ge nanodots fabricated by vacuum evaporation

    Jpn. J. Appl. Phys. 58, SDDG10 (2019).

  8. A. Ishizawa, K. Hitomi, K. Hara, K. Hitachi, T. Nishikawa, T. Sogawa, and H. Gotoh

    Simple method for stabilizing an optical frequency comb to an optical reference without an RF signal generator

    OSA Continuum 2 (5) 1706-1712 (2019).

  9. R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi

    Strain-induced exciton decomposition and anisotropic lifetime modulation in a GaAs micromechanical resonator

    Phys. Rev. B 99 (11), 115315 (2019).

  10. G. Q. Zhang, M. Takiguchi, K. Tateno, T. Tawara, M. Notomi, and H. Gotoh

    Telecom-band lasing in single InP/InAs heterostructure nanowires at room temperature

    Sci. Adv. 5 (2), eaat8896 (2019).

  11. Y. Tanaka, Y. Kunihashi, H. Sanada, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, and T. Sogawa

    Phase velocity of drifting spin wave packets in semiconductor two-dimensional electron gas

    Appl. Phys. Express 12 (1), 013001 (2019).

  12. K. Tateno, G. Q. Zhang, S. Sasaki, M. Takiguchi, and K. Kumakura

    Wurtzite GaP nanowire grown by using tertiarybutylchloride and used to fabricate solar cell

    Jpn. J. Appl. Phys. 58 (1), 015004 (2019).

  1. K. Hitachi, M. Someya, A. Ishizawa, T. Nishikawa, and H. Gotoh

    Characterization of longitudinal acoustic phonons in InGaAsP multiple quantum wells by asynchronous optical sampling

    Appl. Phys. Lett. 113 (20), 201102 (2018).

  2. K. Tateno, G. Q. Zhang, M. Takiguchi, and H. Gotoh

    Alternating InAsP/InP heterostructure nanowires grown with tertiary-butyl chloride

    Nano Futures 2 (4), UNSP 045006 (2018).

  3. T. Inaba, T. Tawara, H. Omi, H. Yamamoto, and H. Gotoh

    Epitaxial growth and optical properties of Er-doped CeO2 on Si(111)

    Opt. Mater. Express 8 (9) 2843-2849 (2018).

  4. R. Ohta, H. Okamoto, T. Tawara, H. Gotoh, and H. Yamaguchi

    Dynamic Control of the Coupling between Dark and Bright Excitons with Vibrational Strain

    Phys. Rev. Lett. 120 (26), 267401 (2018).

  5. M. Takiguchi, G. Q. Zhang, S. Sasaki, K. Nozaki, E. Chen, K. Tateno, T. Tawara, A. Shinya, H. Gotoh, and M. Notomi

    Direct modulation of a single InP/InAs nanowire light-emitting diode

    Appl. Phys. Lett. 112 (25), 251106 (2018).

  6. S. Adachi, Y. Kawakami, R. Kaji, T. Tawara, and H. Omi

    Investigation of Population Dynamics in 1.54-mu m Telecom Transitions of Epitaxial (ErxSc1-x)(2)O-3 Thin Layers for Coherent Population Manipulation: Weak Excitation Regime

    Appl. Sci.-Basel 8 (6), 874 (2018).

  7. K. Oguri, H. Mashiko, T. Ogawa, Y. Hanada, H. Nakano, and H. Gotoh

    Sub-50-as isolated extreme ultraviolet continua generated by 1.6-cycle near-infrared pulse combined with double optical gating scheme

    Appl. Phys. Lett. 112 (18), 181105 (2018).

  8. H. Mashiko, Y. Chisuga, I. Katayama, K. Oguri, H. Masuda, J. Takeda, and H. Gotoh

    Multi-petahertz electron interference in Cr:Al2O3 solid-state material

    Nat. Commun. 9, 1468 (2018).

  9. T. Ota, K. Hitachi, and K. Muraki

    Landau-Zener-Stuckelberg interference in coherent charge oscillations of a one-electron double quantum dot

    Sci Rep 8, 5491 (2018).

  10. G. Q. Zhang, K. Tateno, T. Sogawa, and H. Gotoh

    Diameter-tailored telecom-band luminescence in InP/InAs heterostructure nanowires grown on InP (111)B substrate with continuously-modulated diameter from microscale to nanoscale

    Nanotechnology 29 (15), 155202 (2018).

  11. K. Kato, Y. Hasegawa, K. Oguri, T. Tawara, T. Nishikawa, and H. Gotoh

    Relationship between the Fano asymmetry parameter and time-domain spectra studied by time-resolved measurement of carriers and phonons in &ITp&IT-type Si

    Phys. Rev. B 97 (10), 104301 (2018).

  1. T. Akatsuka, T. Takahashi, and H. Katori

    Optically guided atom interferometer tuned to magic wavelength

    Appl. Phys. Express 10 (11), 112501 (2017).

  2. Y. Kunihashi, H. Sanada, Y. Tanaka, H. Gotoh, K. Onomitsu, K. Nakagawara, M. Kohda, J. Nitta, and T. Sogawa

    Drift-Induced Enhancement of Cubic Dresselhaus Spin-Orbit Interaction in a Two-Dimensional Electron Gas

    Phys. Rev. Lett. 119 (18), 187703 (2017).

  3. A. Ishizawa, T. Goto, R. Kou, T. Tsuchizawa, N. Matsuda, K. Hitachi, T. Nishikawa, K. Yamada, T. Sogawa, and H. Gotoh

    Octave-spanning supercontinuum generation at telecommunications wavelengths in a precisely dispersion- and length-controlled silicon-wire waveguide with a double taper structure

    Appl. Phys. Lett. 111 (2), 021105 (2017).

  4. K. Hitachi, K. Hara, O. Tadanaga, A. Ishizawa, T. Nishikawa, and H. Gotoh

    Reduced pulse energy for frequency comb offset stabilization with a dual-pitch periodically poled lithium niobate ridge waveguide

    Appl. Phys. Lett. 110 (24), 241107 (2017).

  5. K. Takase, Y. Ashikawa, G. Zhang, K. Tateno, and S. Sasaki

    Highly gate-tuneable Rashba spin-orbit interaction in a gate-all-around InAs nanowire metal-oxide-semiconductor field-effect transistor

    Sci Rep 7, 930 (2017).

  6. H. A. Hafez, X. Chai, Y. Sekine, M. Takamura, K. Oguri, I. Al-Naib, M. M. Dignam, H. Hibino, and T. Ozaki

    Effects of environmental conditions on the ultrafast carrier dynamics in graphene revealed by terahertz spectroscopy

    Phys. Rev. B 95 (16), 165428 (2017).

  7. A. Ishizawa, R. Kou, T. Goto, T. Tsuchizawa, N. Matsuda, K. Hitachi, T. Nishikawa, K. Yamada, T. Sogawa, and H. Gotoh

    Optical nonlinearity enhancement with graphene-decorated silicon waveguides

    Sci Rep 7, 45520 (2017).

  8. T. Tawara, G. Mariani, K. Shimizu, H. Omi, S. Adachi, and H. Gotoh

    Effect of isotopic purification on spectral-hole narrowing in Er-167(3+) hyperfine transitions

    Appl. Phys. Express 10 (4), 042801 (2017).

  9. T. Tawara, Y. Kawakami, H. Omi, R. Kaji, S. Adachi, and H. Gotoh

    Mechanism of concentration quenching in epitaxial (ErxSc1-x)(2)O-3 thin layers

    Opt. Mater. Express 7 (3) 1097-1104 (2017).

  10. A. Yokoo, M. Takiguchi, M. D. Birowosuto, K. Tateno, G. Q. Zhang, E. Kuramochi, A. Shinya, H. Taniyama, and M. Notomi

    Subwavelength Nanowire Lasers on a Silicon Photonic Crystal Operating at Telecom Wavelengths

    ACS Photonics 4 (2) 355-362 (2017).

  1. H. Mashiko, K. Oguri, T. Yamaguchi, A. Suda and H. Gotoh

    Petahertz optical drive with wide-bandgap semiconductor

    Nat. Phys. 12 (8), 741-745 (2016).

  2. A. Ishizawa, T. Nishikawa, T. Goto, K. Hitachi, T. Sogawa and H. Gotoh

    Ultralow-phase-noise millimetre-wave signal generator assisted with an electro-optics-modulator-based optical frequency comb

    Sci Rep. 6 24621 (2016).

  3. R. Ohsugi, Y. Kunihashi, H. Sanada, M. Kohda, H. Gotoh, T. Sogawa and J. Nitta

    Bias dependence of spin injection/transport properties of a perpendicularly magnetized FePt/MgO/GaAs structure

    Appl. Phys. Express 9 (4), 043002 (2016).

  4. Y. Kunihashi, H. Sanada, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta and T. Sogawa

    Drift transport of helical spin coherence with tailored spin-orbit interactions

    Nat. Commun. 7 10722 (2016).

  5. K. Kato, F. Furrer and M. Murao

    Information-theoretical analysis of topological entanglement entropy and multipartite correlations

    Phys. Rev. A 93 (2), 022317 (2016).

  6. M. Ono, E. Kuramochi, G. Q. Zhang, H. Sumikura, Y. Harada, D. Cox and M. Notomi

    Nanowire-nanoantenna coupled system fabricated by nanomanipulation

    Opt. Express 24 (8), 8647-8659 (2016).

  7. A. Morinaga, M. Murakami, K. Nakamura, and H. Imai

    Scalar Aharonov-Bohm Phase in Ramsey Atom Interferometry under Time-Varying Potential

    Atoms 4 (3), 23 (2016).

  1. G. Zhang, C. Rainville, A. Salmon, M. Takiguchi, K. Tateno and H. Gotoh

    Bridging the Gap between the Nanometer-Scale Bottom-Up and Micrometer-Scale Top-Down Approaches for Site-Defined InP/InAs Nanowires

    ACS Nano 9, 10580-10589 (2015).

  2. K. Kato, K. Oguri, H. Sanada, T. Tawara, T. Sogawa and H. Gotoh

    Determination of phonon decay rate in p-type silicon under Fano resonance by measurement of coherent phonons

    AIP Adv. 5, 097152 (2015).

  3. K. Hitachi, A. Ishizawa, O. Tadanaga, T. Nishikawa, H. Mashiko, T. Sogawa and H. Gotoh

    Frequency stabilization of an Er-doped fiber laser with a collinear 2f-to-3f self-referencing interferometer

    Appl. Phys. Lett. 106, 231106 (2015).

  4. H. Okamoto, T. Watanabe, R. Ohta, K. Onomitsu, H. Gotoh, T. Sogawa and H. Yamaguchi

    Cavity-less on-chip optomechanics using excitonic transitions in semiconductor heterostructures

    Nat. Commun. 6, 8478 (2015).

  5. S. Sasaki, K. Tateno, G. Q. Zhang, H. Pigot, Y. Harada, S. Saito, A. Fujiwara, T. Sogawa and K. Muraki

    Self-aligned gate-all-around InAs/InP core-shell nanowire field-effect transistors

    Jpn. J. Appl. Phys. 54, 04DN04 (2015).

  6. H. A. Hafez, I. Al-Naib, M. M. Dignam, Y. Sekine, K. Oguri, F. Blanchard, D. G. Cooke, S. Tanaka, F. Komori, H. Hibino, and T. Ozaki

    Nonlinear terahertz field-induced carrier dynamics in photoexcited epitaxial monolayer graphene

    Phys. Rev. B 91 (3), 035422 (2015).

  7. A. Najar, H. Omi, and T. Tawara

    Effect of structure and composition on optical properties of Er-Sc silicates prepared from multi-nanolayer films

    Opt. Express 23 (6) 7021-7030 (2015).

  8. K. Oguri, T. Tsunoi, K. Kato, H. Nakano, T. Nishikawa, K. Tateno, T. Sogawa, and H. Gotoh

    Dynamical observation of photo-Dember effect on semi-insulating GaAs using femtosecond core-level photoelectron spectroscopy

    Appl. Phys. Express 8 (2), 022401 (2015).

  9. R. Ohsugi, J. Shiogai, Y. Kunihashi, M. Kohda, H. Sanada, T. Seki, M. Mizuguchi, H. Gotoh, K. Takanashi, and J. Nitta

    Comparison of electrical and optical detection of spin injection in L10-FePt/MgO/GaAs hybrid structures

    J. Phys. D-Appl. Phys. 48 (16), 164003 (2015).

  10. G. Q. Zhang, K. Tateno, M. D. Birowosuto, M. Notomi, T. Sogawa, and H. Gotoh

    Controlled 1.1-1.6 mu m luminescence in gold-free multi-stacked InAs/InP heterostructure nanowires

    Nanotechnology 26 (11), 115704 (2015).

  1. H. Gotoh, H. Sanada, H. Yamaguchi and T. Sogawa

    Nonlinear optical spectra having characteristics of Fano interferences in coherently coupled lowest exciton biexciton states in semiconductor quantum dots

    AIP Adv. 4 (10), 107124 (2014).

  2. H.A. Hafez, I. Al-Naib, K. Oguri, Y. Sekine, M.M. Dignam, A. Ibrahim, D.G. Cooke, S. Tanaka, F. Komori, H. Hibino and T. Ozaki

    Nonlinear transmission of an intense terahertz field through monolayer graphene

    AIP Adv. 4 (11), 117118 (2014).

  3. K. Hitachi, A. Ishizawa, T. Nishikawa, M. Asobe and T. Sogawa

    Carrier-envelope offset locking with a 2f-to-3f self-referencing interferometer using a dual-pitch PPLN ridge waveguide

    Opt. Express 22 (2), 1629-1635 (2014).

  4. T. Hoshi, N. Kashio, H. Sugiyama, H. Yokoyama, K. Kurishima, M. Ida, H. Matsuzaki and H. Gotoh

    A simple method for forming compositionally graded InxGa1-xAs1-ySby base of double-heterojunction bipolar transistors modulating CBr4-doping-precursor flow in metalorganic chemical vapor deposition

    Appl. Phys. Express 7 (11), 114102 (2014).

  5. T. Hoshi, N. Kashio, H. Sugiyama, H. Yokoyama, K. Kurishima, M. Ida, H. Matsuzaki, M. Kohtoku and H. Gotoh

    MOCVD-grown compressively strained C-doped InxGa1-xAs1-ySby with high-In/Sb content for very low turn-on-voltage InP-based DHBTs

    J. Cryst. Growth 404, 172-176 (2014).

  6. T. Ito, H. Gotoh, M. Ichida and H. Ando

    Evaluation of hole-spin superposition in GaAs/AlGaAs quantum wells through time-resolved photoluminescence measurements

    Appl. Phys. Lett. 104 (25), 252406 (2014).

  7. H. Mashiko, T. Yamaguchi, K. Oguri, A. Suda and H. Gotoh

    Characterizing inner-shell with spectral phase interferometry for direct electric-field reconstruction

    Nat. Commun. 5, 5599 (2014).

  8. H. Okamoto, S. Suzuki, H. Narita, T. Tawara, K. Tateno and H. Gotoh

    Deep-level transient spectroscopy characterization of In(Ga) As quantum dots fabricated using Bi as a surfactant

    Jpn. J. Appl. Phys. 53 (6), 06JG11 (2014).

  9. K. I. Sasaki, H. Gotoh and Y. Tokura

    Valley-antisymmetric potential in graphene under dynamical deformation

    Phys. Rev. B, Condens. Matter Mater. Phys. 90 (20), 205402 (2014).

  10. K. Sasaki and N. Kumada

    Effects of screening on the propagation of graphene surface plasmons

    Phys. Rev. B 90 (3), 035449 (2014).

  11. K. Tateno, G. Q. Zhang and H. Gotoh

    Etching effect of tertiary-butyl chloride during InP-nanowire growth

    J. Cryst. Growth 402, 299-303 (2014).

  12. K. Tateno, G. Q. Zhang and H. Gotoh

    Growth of InP nanowires on graphene-covered Fe

    Jpn. J. Appl. Phys. 53 (1), 015504 (2014).

  13. M. Anagnosti, H. Omi and T. Tawara

    Simultaneous light emissions from erbium-thulium silicates and oxides on silicon in the second and third telecommunications bands

    Opt. Mater. Express 4 (9), 1747-1755 (2014).

  14. A. Najar, H. Omi and T. Tawara

    Scandium effect on the luminescence of Er-Sc silicates prepared from multi-nanolayer films

    Nanoscale Res. Lett. 9, 356 (2014).

  15. M. D. Birowosuto, A. Yokoo, G. Q. Zhang, K. Tateno, E. Kuramochi, H. Taniyama, M. Takiguchi and M. Notomi

    Movable high-Q nanoresonators realized by semiconductor nanowires on a Si photonic crystal platform

    Nat. Mater. 13 (3), 280-286 (2014).

  16. T. Hoshi, N. Kashio, H. Sugiyama, H. Yokoyama, K. Kurishima, M. Ida, H. Matsuzaki, and H. Gotoh

    A simple method for forming compositionally graded InxGa1-xAs1-ySby base of double-heterojunction bipolar transistors modulating CBr4-doping-precursor flow in metalorganic chemical vapor deposition

    Appl. Phys. Express 7 (11), 114102 (2014).

  1. H. Gotoh, H. Sanada, H. Yamaguchi, and T. Sogawa

    Modifying exciton optical properties in quantum dots with coherent phonons induced by ultrafast optical pulses

    Appl. Phys. Lett. 103 (11), 112104 (2013).

  2. Y. Hayashi, AS. Pirozhkov, M. Kando, K. Ogura, H. Kotaki, H. Kiriyama, H. Okada, H. Gotoh, and T. Nishikawa

    Xe K-shell X-ray generation using conical nozzle and 25 TW laser

    Laser Part. Beams 31 (3), 419-425 (2013).

  3. H. Hideki Gotoharuki H. Sanadairoshi Yamaguchi, and Tetsuomi Sogawa

    Direct Biexciton Creation with Two-Photon Excitation for Ideal Entangled Photon Pair Emissions in Optically Active Quantum Dots,

    J. Appl. Phys. 52, 120202, (2013) .

  4. K. Hitachi, A. Ishizawa, T. Nishikawa, M. Asobe, and T. Sogawa

    Periodically poled lithium niobate ridge waveguides with high conversion efficiency for 2f-to-3f self-referencing interferometer

    Electron. Lett. 49 (2), 145 (2013).

  5. T. Hoshi, H. Sugiyama, H. Yokoyama, K. Kurishima, M. Ida, H. Matsuzaki, and K. Tateno

    Carbon doping in InGaAsSb films on (001) InP substrate using CBr4 grown by metalorganic chemical vapor deposition

    J. Cryst. Growth 380, 197-204 (2013).

  6. A. Ishizawa, T. Nishikawa, A. Mizutori, H. Takara, A. Takada, T. Sogawa, and M. Koga

    Phase-noise characteristics of a 25-GHz-spaced optical frequency comb based on a phase- and intensity-modulated laser

    Opt. Express 21 (24), 29186-29194 (2013).

  7. H. Mashiko, K. Oguri, and T. Sogawa

    Attosecond pulse generation in carbon K-edge region (284 eV) with sub-250 mu J driving laser using generalized double optical gating method

    Appl. Phys. Lett. 102 (17), 171111 (2013).

  8. H. Sanada, Y. Kunihashi, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, PV. Santos, and T. Sogawa

    Manipulation of mobile spin coherence using magnetic-field-free electron spin resonance

    Nat. Phys. 9 (5), 280-283 (2013).

  9. K. Sasaki, Y. Sekine, K. Tateno, and H. Gotoh

    Topological Raman Band in the Carbon Nanohorn

    Phys. Rev. Lett. 111 (11), 116801 (2013).

  10. T. Tawara, H. Omi, T. Hozumi, R. Kaji, S. Adachi, H. Gotoh, and T. Sogawa

    Population dynamics in epitaxial Er2O3 thin films grown on Si(111)

    Appl. Phys. Lett. 102 (24), 241918 (2013).

  11. GQ. Zhang, S. Sasaki, K. Tateno, H. Gotoh, and T. Sogawa

    Au-free InAs nanowires grown in In-particle-assisted vapor-liquid-solid mode: growth, structure, and electrical property

    AIP Adv. 3 (5), 052107 (2013).

  12. H. Omi, Y. Abe, M. Anagnosti, and T. Tawara

    Mixture formation of ErxYb2-xSi2O7 and ErxYb2-xO3 on Si for broadening the C-band in an optical amplifier

    AIP Adv. 3 (4), 042107 (2013).

  13. H. Omi, A. Hagiwara, and T. Tawara

    Light emission from thulium silicates and oxides for optical amplifiers on silicon in the extended optical communications band

    AIP Adv. 3 (7), 072122 (2013).

  14. Y. Furukawa, A. Shimada, K. Kato, H. Iwata, and K. Torimitsu

    Monitoring neural stem cell differentiation using PEDOT-PSS based MEA

    Biochim. Biophys. Acta-Gen. Subj. 1830 (9), 4329-4333 (2013).

  15. S. Sasaki, K. Tateno, GQ. Zhang, H. Suominen, Y. Harada, S. Saito, A. Fujiwara, T. Sogawa, and K. Muraki

    Encapsulated gate-all-around InAs nanowire field-effect transistors

    Appl. Phys. Lett. 103 (21), 213502 (2013).

  1. H. Gotoh, H. Sanada, H. Yamaguchi, and T. Sogawa

    Charged exciton creation with two-color optical excitation method and analysis of initialization process of electron spin qubit in quantum dots

    Journal Of Applied Physics 111 (12), 123520 (2012).

  2. T. Hattori, A. Kubo, K. Oguri, H. Nakano, and HT. Miyazaki

    Femtosecond Laser-Excited Two-Photon Fluorescence Microscopy of Surface Plasmon Polariton

    Japanese Journal Of Applied Physics 51 (4), 04DG03 (2012).

  3. K. Kato, K. Oguri, A. Ishizawa, H. Nakano, and T. Sogawa

    Ultrafast carrier and coherent phonon dynamics in semi-insulated and n-type 4H-SiC

    Journal Of Applied Physics 111 (11), 113520 (2012).

  4. Y. Kunihashi, M. Kohda, H. Sanada, H. Gotoh, T. Sogawa, and J. Nitta

    Proposal of spin complementary field effect transistor

    Applied Physics Letters 100 (11), 113502 (2012).

  5. K. Oguri, K. Kato, T. Nishikawa, H. Gotoh, K. Tateno, T. Sogawa, and H. Nakano

    Time-Resolved Surface Photoelectron Spectroscopy of Photoexcited Electron and Hole Dynamics on GaAs Using 92 eV Laser Harmonic Source

    Japanese Journal Of Applied Physics 51 (7), 072401 (2012).

  6. K. Sasaki, K. Kato, Y. Tokura, S. Suzuki, and T. Sogawa

    Pseudospin for Raman D band in armchair graphene nanoribbons

    Physical Review B 85 (7), 075437 (2012).

  7. K. Sasaki, K. Kato, Y. Tokura, S. Suzuki, and T. Sogawa

    Decay and frequency shift of both intervalley and intravalley phonons in graphene: Dirac-cone migration

    Physical Review B 86 (20), 201403 (2012).

  8. T. Sogawa, H. Sanada, H. Gotoh, H. Yamaguchi, and PV. Santos

    Dynamic control of photoluminescence polarization properties in GaAs/AlAs quantum wells by surface acoustic waves

    Physical Review B 86 (3), 035311 (2012).

  9. T. Sogawa, H. Sanada, H. Gotoh, H. Yamaguchi, and PV. Santos

    Spatially modulated photoluminescence properties in dynamically strained GaAs/AlAs quantum wells by surface acoustic wave

    Applied Physics Letters 100 (16), 162109 (2012).

  10. K. Tateno, G. Zhang., H. Gotoh, and T. Sogawa.

    Flat-Top and Stacking-Fault-Free GaAs-Related Nanopillars Grown on Si Substrates

    Journal Of Nanotechnology (), 890607 (2012).

  11. K. Tateno, GQ. Zhang, H. Gotoh, and T. Sogawa

    VLS Growth of Alternating InAsP/InP Heterostructure Nanowires for Multiple-Quantum-Dot Structures

    Nano Letters 12 (6), 28882893 (2012).

  12. GQ. Zhang, K. Tateno, H. Gotoh, and T. Sogawa

    Vertically Aligned InP Nanowires Grown via the Self-Assisted Vapor-Liquid-Solid Mode

    Applied Physics Express 5 (5), 055201 (2012).

  13. T. Akasaka, H. Gotoh, Y. Kobayashi, and H. Yamamoto

    Extremely Narrow Violet Photoluminescence Line from Ultrathin InN Single Quantum Well on Step-Free GaN Surface

    Advanced Materials 24 (31), 4296+ (2012).

  14. J. Fiala, H. Omi, and T. Tawara

    Electroluminescence from Er3+ incorporated into silicon oxide thin film on silicon in a scanning tunneling microscope

    Journal Of Nanophotonics 6 (), 063503 (2012).

  15. H. Omi, and T. Tawara

    Energy Transfers between Er3+ Ions Located at the Two Crystalographic Sites of Er2O3 Grown on Si(111)

    Japanese Journal Of Applied Physics 51 (2), 02BG07 (2012).

  16. H. Omi, T. Tawara, and M. Tateishi

    Real-time synchrotoron radiation X-ray diffraction and abnormal temperature dependence of photoluminescence from erbium silicates on SiO2/Si substrates

    Aip Advances 2 (1), 012141 (2012).

  17. T. Watanabe, H. Okamoto, K. Onomitsu, H. Gotoh, T. Sogawa, and H. Yamaguchi

    Optomechanical photoabsorption spectroscopy of exciton states in GaAs

    Applied Physics Letters 101 (8), 082107 (2012).

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