| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bliem, Roland
University of Amsterdam
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Bridging the gap between high-entropy alloys and metallic glasses:Control over disorder and mechanical properties of coatings
- 2023Femtosecond Laser-Induced Emission of Coherent Terahertz Pulses from Ruthenium Thin Filmscitations
- 2023Identifying silicides via plasmon loss satellites in photoemission of the Ru-Si systemcitations
- 2023Why Teflon is so slippery while other polymers are notcitations
- 2022Electronic and structural properties of crystalline and amorphous (TaNbHfTiZr)C from first principlescitations
- 2022Electronic and structural properties of crystalline and amorphous (TaNbHfTiZr)C from first principlescitations
- 2022Ultrathin, sputter-deposited, amorphous alloy films of ruthenium and molybdenumcitations
- 2022Ultrathin, sputter-deposited, amorphous alloy films of ruthenium and molybdenumcitations
- 2021The influence of corrosion on diamond-like carbon topography and friction at the nanoscalecitations
- 2021Hf deposition stabilizes the surface chemistry of perovskite manganite oxidecitations
- 2021Tuning point defects by elastic strain modulates nanoparticle exsolution on perovskite oxidescitations
- 2020Thermally driven interfacial degradation between Li7La3Zr2O12 electrolyte and LiNi0.6Mn0.2Co0.2O2 cathodecitations
- 2020Shape-Preserving Chemical Conversion of Architected Nanocompositescitations
- 2015Adsorption and incorporation of transition metals at the magnetite Fe3O4(001) surfacecitations
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article
Femtosecond Laser-Induced Emission of Coherent Terahertz Pulses from Ruthenium Thin Films
Abstract
<p>We demonstrate emission of electromagnetic pulses with frequencies in the terahertz (THz) range from ruthenium thin films through a second-order nonlinear optical process. Ruthenium deposited on different substrates showed different THz emission properties. We provide evidence that for Ru on glass above a certain power threshold, laser-induced oxidation occurs, resulting in an increased slope of the linear dependence of the THz electric field amplitude on pump power. The THz electric field is mainly polarized parallel to the sample surface, pointing in the same direction everywhere. In contrast to Ru on glass, the electric field amplitude of the THz pulses emitted by Ru on sapphire and on CaF<sub>2</sub> shows a simple single linear dependence on pump power, and it is polarized orthogonal to the sample surface. In this case, thermal oxidation in an oven enhances the emission and introduces an additional polarization component along the sample surface. This component also points in the same direction everywhere on the surface, similar to the as-deposited Ru on glass. Although the precise THz generation mechanism remains an open question, our results show a strong correlation between the emission strength and the degree of oxidation. Furthermore, the results highlight the importance of the interfaces, i.e., both the choice of the substrate and the chemical composition of the top surface in THz emission experiments. Knowledge of the state of the sample surface is therefore crucial for the interpretation of THz emission experiments from (nonmagnetic) metal surfaces.</p>