Abstract
The nonlinear energy dynamics and charge carrier generation of a model donor-acceptor two-photon dye, AF-380, is investigated using ultrafast nonlinear spectroscopy. This material has been the focus of several investigations due to its large reported two-photon absorption cross-section, the discrepancies between long and short pulse measurements, and its use in microfabrication through holographic two-photon induced photopolymerization. It is believed that a substantial excited state absorbance can account for the difference in two-photon cross section measurements, and furthermore, that the resulting excited state exhibits a lifetime substantially long enough to affect subsequent absorption of longer pump pulses or higher repetition rates. Experimental and theoretical considerations of the electronic dynamics are discussed using a rate analysis and beam propagation code for comparison.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 220-228 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4797 |
| DOIs | |
| State | Published - 2002 |
| Externally published | Yes |
| Event | Multiphoton Absorption and Nonlinear Transmission Processes: Materials, Theory, and Applications - Seattle, WA, United States Duration: Jul 8 2002 → Jul 9 2002 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering