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

fYear

2001

fDate

11-11 May 2001

Firstpage

217

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/QELS.2001.962098

Filename

962098