Title :
Giant and ultrafast optical nonlinearity in low dimensional perovskite copper oxides
Author :
Ashida, M. ; Ogasawara, T. ; Motoyama, N. ; Eisaki, H. ; Uchida, S. ; Taguchi, Y. ; Tokura, Y. ; Kuwala-Gonokami, M. ; Ghosh, H. ; Shukla, A. ; Mazumdar, S.
Author_Institution :
Japan Sci. & Technol. Corp., Kawasaki, Japan
Abstract :
Summary form only given. Anomalous behaviors of conductivity and/or magnetic properties, which are observed in perovskite transition metal oxides, have attracted much interest recently. In the present paper, we report on a peculiar optical response observed in quasi-one-dimensional (1D) cuprates, Sr/sub 2/CuO/sub 3/ and SrCuO/sub 2/. Femtosecond pump-probe transmission spectra in the 1D cuprates are measured at 10-300 K. To change the pump and probe energies independently, we used two optical parametric oscillators, which are pumped with a regenerative amplifier and generate light pulses with /spl sim/200 fs width in the region of 0.3-20 /spl mu/m.
Keywords :
high-speed optical techniques; light absorption; nonlinear optics; optical materials; optical parametric oscillators; optical pumping; strontium compounds; two-photon processes; 0.3 to 20 mum; 10 to 300 K; 1D cuprates; 200 fs; Sr/sub 2/CuO/sub 3/; SrCuO/sub 2/; conductivity; femtosecond pump-probe transmission spectra; giant ultrafast optical nonlinearity; light pulses; low dimensional perovskite copper oxides; magnetic properties; optical parametric oscillators; optical response; perovskite transition metal oxides; probe energies; pump energies; quasi-one-dimensional cuprates; regenerative amplifier; Conductivity; Copper; Energy measurement; Magnetic properties; Optical pulse generation; Optical pumping; Pulse amplifiers; Pulse measurements; Strontium; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2000. (QELS 2000). Technical Digest
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-608-7
