Investigation of third-order nonlinearity of an azo dye and its metal-substituted compounds
| Autor: | Yinghua Zou, Shuangqing Wang, Wei Qian, Saijun Wu, Shuyin Shen, Zongju Xia, Huijun Xu |
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| Rok vydání: | 2000 |
| Předmět: |
Heterodyne
Materials science Analytical chemistry General Physics and Astronomy chemistry.chemical_element Orders of magnitude (numbers) Photochemistry Copper Third order nonlinearity Metal Wavelength Delocalized electron chemistry visual_art Femtosecond visual_art.visual_art_medium Physical and Theoretical Chemistry |
| Zdroj: | Chemical Physics Letters. 330:535-540 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/s0009-2614(00)01135-0 |
| Popis: | The real part of third-order optical nonlinearity of an azo dye (2-(2-thiazolylazo)-5-diethylaminophenol, TAEP) and those of its copper- and cobalt-substituted compounds are measured by using femtosecond optical heterodyne optical Kerr gate technique at the wavelength of 647 nm. All the values are found to be negative. Those of Cu- and Co-substituted compounds are found to be larger than that of the metal-free dye by two and three orders of magnitude, respectively. A negative γ eff as large as 10 −29 esu is found in Co complex. We use a three-level model to characterize the nonlinear process, and suggest that π-electron delocalization in metal complex leads to an enhancement. |
| Databáze: | OpenAIRE |
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