Researchers Database

Hidetoshi Nakano

    Department of Electrical and Electronic Engineering Professor
    Research Institute of Industrial Technology Researcher
    Course of Electricity, Electronics and Communications Professor
Last Updated :2025/05/16

Researcher Information

URL

Research funding number

  • 90393793

J-Global ID

Research Interests

  • 光物性   半導体   時間分解光電子分光   量子ビーム   放射線・X線・粒子線   超高速ダイナミクス   結晶成長   高性能レーザー   光源技術   半導体物性   高次高調波   

Research Areas

  • Nanotechnology/Materials / Optical engineering and photonics

Academic & Professional Experience

  • 2011/04  Toyo UniversityFaculty of Science and Engineering教授
  • 1997/04 - 2011/03  NTT物性科学基礎研究所主幹研究員
  • 1993/09 - 1997/03  NTT基礎研究所主任研究員
  • 1991/11 - 1993/08  NTT交換システム研究所主任研究員
  • 1987/04 - 1991/10  NTT基礎研究所

Education

  • 1984/04 - 1987/03  東京大学大学院  工学系研究科  電気工学専攻 博士課程
  • 1982/04 - 1984/03  東京大学大学院  工学系研究科  電子工学専攻 修士課程
  •        - 1982/03  The University of Tokyo  The Faculty of Engineering  Department of Electronic Engineering

Association Memberships

  • IEEE   The Optical Society of America   THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN   THE LASER SOCIETY OF JAPAN   THE PHYSICAL SOCIETY OF JAPAN   THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS   THE JAPAN SOCIETY OF APPLIED PHYSICS   SPIE   

Published Papers

Conference Activities & Talks

MISC

Awards & Honors

  • 2008/05 レーザー学会 第 32 回レーザー学会論文賞[オリジナル部門]
     超高速 XAFS 分光法によるフェムト秒レーザーアブレーションプルームの時空間発展ダイナミクス計測 
    受賞者: 小栗 克弥;岡野 泰彬;西川 正;中野 秀俊
  • 2004/09 応用物理学会 第26回応用物理学会論文賞(JJAP 論文賞)
     Enhanced Water-Window X-Ray Pulse Generation from Femtosecond-Laser-Produced Plasma with a Carbon Nanotube Target 
    受賞者: 西川 正;小栗 克弥;鈴木 哲;渡辺 義夫;中野 秀俊

Research Grants & Projects

  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2019/04 -2022/03 
    Author : Amako Jun
     
    We have developed a novel optical system that splits an ultrashort-pulsed laser beam with a diffractive beam splitter to make a distortion-compensated pulse beam array in a practically significant length. Diffracted ultrashort pulse beams are distorted in space and time owing to the broad spectra of the pulses. Given that all distortions come from system dispersions, key to the pulse distortion compensation is dispersion management. Using simple formulas we designed the optical system in which hybrid lenses are of essence, which effectively manage material and angular dispersions of the system. Through system evaluations using 20-fs laser pulses, we have corroborated that the designed optical system is able to remove pulse distortions, thereby improving the spatio-temporal focusing resolutions of the system. The proposed pulse delivery technique enables high-throughput, non-thermal ablation of materials, thus contributing to industrial applications of ultrashort laser processing.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2014/04 -2017/03 
    Author : AMAKO JUN; MURAKAKI Takumi; UEDA Yoshihito; SATO Shin; TAKEDA Shu; KANNO Takayuki; KOBAYASHI Masaya
     
    We have developed a cascade optical system for multifocusing of ultrashort pulse beams. The system consists of a diffractive subsystem, a refractive subsystem, and a phase plate located between them. The primary reason for pulse distortions is chromatic aberrations arising from a diffractive beam splitter. Two subsystems optically coupled in cascade correct chromatic aberrations and the phase plate compensates for angular dispersions, while remaining material dispersions are removed by pre-chirping the input pulse. We designed a prototype system for evaluation by applying the aberration correction conditions derived from a ray-matrix analysis. The designed system was evaluated with 20-fs pulses by characterizing the transmitted pulses in terms of spatial and temporal profiles to verify the proposed beam delivery scheme. This optical system, which has the potential to be extended to sub-20 fs, enables thermal-free and high-throughput nano-and micro-processing using ultrashort pulses.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2011/04 -2014/03 
    Author : OGURI Katsuya; NAKANO Hidetoshi; HIBINO Hiroki; KATO Keiko; SEKINE Yoshiaki
     
    To clarify ultrafast relaxation dynamics in high quality and large-area graphene which is grown on a silicon carbide substarate by sublimating silicon, we have developed femtosecond time-resolved surface photoelectron spectroscopy based on a high-order harmonics source. By using this system, we clarified the surfce transport of photoexcited electron and hole on a semiconductor surface, thus showing the potential of this system for measuring ultrafast relaxation dynamics in graphene. We have also studied the surface-enhanced Raman scattering (SERS)of graphene grown on SiC by depositing Ag. The enhancement of the Raman spectrum in graphene reached more than 60. Moreover, we have successfully estimated a electron dephasing time of monolayer graphene to be approxiamtely 50 fs by using a time-resolved transient diffraction technique.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2006 -2009 
    Author : KOBAYASHI Yasuyuki; MAKIMOTO Toshiki; AKASAKA Tetsuya; NISHIKAWA Atsushi; NAKANO Hidetoshi; GOTOH Hideki; TAWARA Takehiko; SANADA Haruki
     
    We demonstrate that (0001) hexagonal boron nitrides (h-BN) are epitaxially grown on (111) Ni and (0001) sapphire substrates by metalorganic vapor phase epitaxy. A near-band-gap ultraviolet emission peak centered at energy of 5.47eV (227nm) is clearly observed in cathodoluminescence spectra at room temperature from the h-BN epitaxial layers. The photon energy dependence of the squared absorption coefficient is linear, indicating a direct band gap in the h-BN, and the optical band gap is determined to be 5.9eV. The h-BN has a promising as an optoelectronic material in the deep ultraviolet spectral region.
  • 日本学術振興会:科学研究費助成事業
    Date (from‐to) : 2002 -2005 
    Author : 中村 一隆; 弘中 陽一郎; 中野 秀俊
     
    高強度フェムト秒レーザー光を真空中で金属ターゲットに集光照射することにより、超短パルス硬X線を発生し、これを用いたフェムト秒時間分解X線回折を用いた物質ダイナミクスの研究を行った。本年度は、50フェムト秒レーザー光励起によるCdTe単結晶のコヒーレント光学フォノン計測に成功した。光学フォノンは重心が固定された運動であるため、結晶格子間隔の変化に対応する回折角度の変化がない。そのために通常のX線回折法では検出することができない。本研究では、格子振動周期よりも短いパルス幅の光パルスを用いて励起することで、位相の揃ったフォノンであるコヒーレント光学フォノンの励起を行った。これに加えて、振動周期よりも十分短い時間分解能での測定を行うことにより、X線回折強度の変調として、コヒーレント光学フォノンの計測に成功した。50フェムト秒レーザー光照射を行うと、X線回折強度は20ピコ秒以内に強度減少することが観測された。また、この状態を20フェムト秒の時間ステップでX線回折測定を行うと、約200フェムト秒の周期(5THz)の振動成分がCdTe(111)のX線回折強度の時間プロファイルに現れた。ラマン分光測定との比較から、この振動はCdTeのガンマ点におけるLOフォノンであることが分かった。また、フェムト秒時間分解反射率測定も行い、励起されたフォノンがCdTeのLOフォノンであることを確認した。 本研究で、200フェムト秒の振動が観測されたことから、200フェムト秒の時間分解X線回折測定が可能であること、またフェムト秒レーザー誘起プラズマX線のパルス幅が数百フェムト秒であることが明らかになった。