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  1. Article

    Open Access

    Ultrafast electronic state conversion at room temperature utilizing hidden state in cuprate ladder system

    Photo-control of material properties on femto- (10−15) and pico- (10−12) second timescales at room temperature has been a long-sought goal of materials science. Here we demonstrate a unique ultrafast conversion b...

    R. Fukaya, Y. Okimoto, M. Kunitomo, K. Onda, T. Ishikawa… in Nature Communications (2015)

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  2. No Access

    Chapter and Conference Paper

    Optically Induced Magnetization and Ultrafast Spin Dynamics of Magnetic Ions in Ionic Crystals

    Optically induced magnetizations in Tm2+:CaF2 and Cr3+:A12O3 are observed by using the polarization spectroscopy. Quantum-beat free-induction decay and ultrafast spin-lattice relaxation near room temperature in t...

    T. Kohmoto, K. Nakazono, S. Furue, M. Kunitomo, Y. Fukuda in Ultrafast Phenomena XIV (2005)

  3. No Access

    Article

    Characterization of Ta2O5 Thin Films with Small Current Leakage for High Density Drams

    We have confirmed that grain boundaries are related to leakage problems in Ta2O5/SiON capacitors for high dielectric DRAMs. XRD studies using an intensity ratio of (200) to (001) showed that the crystallographic ...

    N. Kanda, R. Furukawa, M. Ishibashi, M. Kunitomo… in MRS Online Proceedings Library (1999)