Autor: Ishikawa, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Search for the Photo-Induced Hidden Phase in Inorganic and Organic Systems
Autorzy:: Koshihara, S.
Onda, K.
Okimoto, Y.
Ishikawa, T.
Powiązania:: https://bibliotekanauki.pl/articles/1489970.pdf
Data publikacji:: 2012-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.47.J-
63.20.kd
71.30.+h
71.45.Lr
Opis:: We review the dynamical behavior of strongly electron-lattice (orbital) coupled system induced by photo-excitation of fs laser pulse. By virtue of the femtosecond (fs) spectroscopy and picosecond (ps) time-resolved X-ray diffraction measurements, we demonstrate that the photo-irradiation creates new ordered state so called as "hidden phase" which can never be realized under thermo-equilibrium condition. This exotic phase commonly plays the key role for realizing the gigantic photo-induced changes in optical properties of inorganic and organic electron-lattice strongly coupled systems.
Źródło:: Acta Physica Polonica A; 2012, 121, 2; 328-331
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Femtosecond Reflection Spectroscopy in $La_{1.5}Sr_{0.5}CoO_4$
Autorzy:: Egawa, T.
Okimoto, Y.
Fukaya, R.
Onda, K.
Ishikawa, T.
Koshihara, S.
Isayama, A.
Sasagawa, T.
Powiązania:: https://bibliotekanauki.pl/articles/1489953.pdf
Data publikacji:: 2012-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.47.J-
78.47.jg
Opis:: Ultrafast optical response has been investigated using fs laser system on a perovskite-type cobalt oxide, $La_{1.5}Sr_{0.5}CoO_4$. After the photoirradiation at room temperature, the time profile of relative change of reflectance (Δ R/R) shows a sudden change within the pulse duration ( ≈ 150 fs) and decays with a lifetime of ≈ 330 fs. The sign of Δ R/R after the photoexcitation is positive in the mid-infrared region (at 0.50 eV) while negative in the visible energy region (at 2.0 eV), implying photoinduced change of the electronic structure after the photoexcitation.
Źródło:: Acta Physica Polonica A; 2012, 121, 2; 307-309
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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