Title :
Femtosecond pump-probe spectroscopy on two-dimensionally confined excitons in inorganic-organic layered perovskite compound
Author :
Shimizu, M. ; Neogi, A. ; Noh, T. ; Ishihara, T.
Author_Institution :
Frontier Res. Program, RIKEN, Wako, Japan
Abstract :
Summary form only given. In an inorganic-organic layered compound of (C/sub 6/H/sub 5/C/sub 2/H/sub 4/NH/sub 3/)/sub 2/PbI/sub 4/, a 2D exciton has a binding energy of 220 meV and an oscillator strength of 0.5 per formula unit by virtue of the spatial and the dielectric confinement by organic barrier layers. In order to investigate the optical nonlinearity and its mechanism affected by these characteristics, we have performed the pump-probe spectroscopy on its spin coated films at 5K. The time resolution was about 200 fs and the pump power density was 1 MJ/cm/sup 2/.
Keywords :
binding energy; excitons; high-speed optical techniques; nonlinear optics; optical pumping; organic compounds; oscillator strengths; time resolved spectra; time resolved spectroscopy; 200 fs; 220 meV; 2D exciton; 5 K; C/sub 6/H/sub 5/C/sub 2/H/sub 4/NH/sub 3/)/sub 2/PbI/sub 4/; band gap; binding energy; dielectric confinement; differential absorption spectra; exciton resonance; femtosecond pump-probe spectroscopy; inorganic-organic layered perovskite compound; linear absorption spectrum; lowest exciton resonance; optical nonlinearity; organic barrier layers; oscillator strength; pump power density; spin coated films; time resolution; two-dimensionally confined excitons; Absorption; Bleaching; Dielectrics; Electrochemical impedance spectroscopy; Excitons; Lattices; Optical films; Photonic band gap; Resonance; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2001. QELS '01. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-663-X
DOI :
10.1109/QELS.2001.962098
