title: Real-time time-frequency two-dimensional imaging of ultrafast transient signals in solid-state organic materials.
abstract: In this review, we demonstrate a real-time time-frequency two-dimensional (2D) pump-probe imaging spectroscopy implemented on a single shot basis applicable to excited-state dynamics in solid-state organic and biological materials. Using this technique, we could successfully map ultrafast time-frequency 2D transient absorption signals of β-carotene in solid films with wide temporal and spectral ranges having very short accumulation time of 20 ms per unit frame. The results obtained indicate the high potential of this technique as a powerful and unique spectroscopic tool to observe ultrafast excited-state dynamics of organic and biological materials in solid-state, which undergo rapid photodegradation.
authors.affiliation: Department of Physics, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan. jun@ynu.ac.jp
authors.forename: Jun
authors.initials: J
authors.lastname: Takeda
authors.forename: Akihiro
authors.initials: A
authors.lastname: Ishida
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Makishima
authors.forename: Ikufumi
authors.initials: I
authors.lastname: Katayama
mesh_terms: D010782:Photolysis; D013057:Spectrum Analysis / Q000379:methods*; D013997:Time Factors; D019207:beta Carotene / Q000737:chemistry*
chemical_list: D019207:beta Carotene