Population gratings in degenerate four-wave mixing studies of a nickel dithiolene at 1064 nm
✍ Scribed by Stephen M. Kuebler; Robert G. Denning
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 783 KB
- Volume
- 250
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The nickel dithiolene complex Ni(S,C,PhBu), has been studied using time-resolved degenerate four-wave mixing (DFWM) at 1064 nm. An analysis of the polarisation and temporal behaviour using the near-counter-propagating geometry shows that population gratings make a substantial contribution to the DFWM signals. These findings contrast with previous DFWM studies using a retro-reflection geometry which suggested that faster processes dominate. Experimental artefacts, inherent to the retro-reflection configuration, can account for this difference. Measurements of the orientational relaxation time in several solvents, and an estimated excited state lifetime in dichloromethane, are presented.