Susdorf, T. and Bansal, A. K. and Penzkofer, A. and Guo, Sheng-Li and Shi, Jing-Min (2007) Absorption and emission spectroscopic characterization of some azo dyes and a diamino-maleonitrile dye. CHEMICAL PHYSICS, 333 (1). pp. 49-56. ISSN 0301-0104,
Full text not available from this repository. (Request a copy)Abstract
A linear and nonlinear optical spectroscopic characterization is carried out on three azo dyes (Reactive orange 1, Reactive violet 8, and Acidproof purplish red), and on N-(p-hydroxybenzylidene)-diamino-maleonitrile. Fluorescence quantum distributions, fluorescence quantum yields, and fluorescence lifetimes are measured. The saturable absorption is studied by nonlinear transmission measurements with intense picosecond laser pulses. The ground-state absorption recovery is studied by picosecond time-resolved pump and probe measurements. Absolute ground-state absorption cross-sections, excited-state absorption cross-sections, and dye concentrations are extracted from saturable absorption studies. The azo dyes have fluorescence lifetimes and ground-state absorption recovery times of around 2 ps and their excited-state absorption cross-sections are small (measured at 527 nm) making them good mode-locking dyes for picosecond and femtosecond lasers. The investigated diamino-maleonitrile dye exhibits sub-picosecond fluorescence lifetime and slow ground-state absorption recovery (> 1 ns). (c) 2007 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PICOSECOND LIGHT-PULSES; RHODAMINE 6G; LASER-PULSES; FLUORESCENCE; RELAXATION; FULLERENES; MOLECULES; BEHAVIOR; SOLVENT; SOLUTE; Reactive violet 8; Reactive orange 1; acidproof purplish red; maleonitrile dye; fluorescence up-conversion; pump-probe spectroscopy; absorption spectroscopy; fluorescence spectroscopy; saturable absorption; ground-state absorption cross-section; excited-state absorption cross-section; fluorescence lifetime; absorption recovery time |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Alfons Penzkofer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Dec 2020 07:51 |
| Last Modified: | 21 Dec 2020 07:51 |
| URI: | https://pred.uni-regensburg.de/id/eprint/33042 |
Actions (login required)
 |
View Item |
