Abstract
Optical limiting performance and third-order nonlinearity χ(3) are investigated in 5,10,15,20-(tetratolyl) porphyrinato phosphorus (V) dichloride ([(TTP)PVCl2]+). Heavy atom effect exerted by the two axial chlorides is found to result in low fluorescence yield (∅fl), shorter lifetimes of S1, T1 and faster intersystem crossing (ISC), leading to larger excited state absorption (ESA) from T1 → Tn. This phenomenon is found to lower the limiting threshold by 30 times and increase the second hyperpolarizability by one and three orders in ps and ns time regimes, respectively.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 347-352 |
| Number of pages | 6 |
| Journal | Optics Communications |
| Volume | 202 |
| Issue number | 4-6 |
| DOIs | |
| State | Published - Feb 15 2002 |
| Externally published | Yes |
Keywords
- Exicited state absorption
- Heavy atom effect
- Optical limiting
- Porphyrin
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering