Investigation of the nonlinear absorption of [M(Et2timdt)2] (M = Pd, Pt) in the pico- and nanosecond timescales using the Z-scan technique
| Autor: | F. A. Devillanova, T. Cassano, Raffaele Tommasi, M Arca |
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| Rok vydání: | 2006 |
| Předmět: |
Nonlinear absorption
Chemistry Analytical chemistry Saturable absorption Nanosecond Condensed Matter Physics Molecular physics Metal Photoexcitation visual_art Picosecond visual_art.visual_art_medium General Materials Science Z-scan technique Physics::Chemical Physics Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Physics: Condensed Matter. 18:5279-5290 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/0953-8984/18/23/002 |
| Popis: | The nonlinear optical absorption of two neutral metal dithiolenes [M(Et2timdt)2] (M = Pd and Pt) has been investigated at λ = 1064 nm by the open-aperture Z-scan technique using nanosecond and picosecond pulses. For picosecond photoexcitation, both dithiolenes mainly exhibit saturable absorption. Conversely, using nanosecond pulses, a switch from saturable absorption to reverse saturable absorption has been observed depending on the central metal. Based on experimental results, energy-level structures are suggested to explain the nonlinear absorption for both temporal regimes and, in particular, the sign-reversal of nonlinear absorption. |
| Databáze: | OpenAIRE |
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