| 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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Graczykowski, Bartlomiej
Adam Mickiewicz University in Poznań
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023Size-dependent nanoscale soldering of polystyrene colloidal crystals by supercritical fluidscitations
- 2023Control of Intermolecular Interactions toward the Production of Free-Standing Interfacial Polydopamine Filmscitations
- 2022Optomechanical Hot-Spots in Metallic Nanorod–Polymer Nanocompositescitations
- 2022Optomechanical Hot-Spots in Metallic Nanorod–Polymer Nanocompositescitations
- 2021Study of nanostructured ultra-refractory Tantalum-Hafnium-Carbide electrodes with wide electrochemical stability windowcitations
- 2021Direct visualization and characterization of interfacially adsorbed polymer atop nanoparticles and within nanocompositescitations
- 2020Ultrathin polydopamine films with phospholipid nanodiscs containing a glycophorin a domaincitations
- 2020Frequency-domain study of nonthermal gigahertz phonons reveals Fano coupling to charge carrierscitations
- 2020Thermal conductivity and air-mediated losses in periodic porous silicon membranes at high temperatures
- 2020Ultrathin Polydopamine Films with Phospholipid Nanodiscs Containing a Glycophorin A Domaincitations
- 2018Well-defined metal-polymer nanocomposites : the interplay of structure, thermoplasmonics, and elastic mechanical propertiescitations
- 2016Thermal conductivity of MoS2 polycrystalline nanomembranes
Places of action
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article
Frequency-domain study of nonthermal gigahertz phonons reveals Fano coupling to charge carriers
Abstract
Telecommunication devices exploit hypersonic gigahertz acoustic phonons to mediate signal processing with microwave radiation, and charge carriers to operate various microelectronic components. Potential interactions of hypersound with charge carriers can be revealed through frequency- and momentum-resolved studies of acoustic phonons in photoexcited semiconductors. Here, we present an all-optical method for excitation and frequency-, momentum-, and space-resolved detection of gigahertz acoustic waves in a spatially confined model semiconductor. Lamb waves are excited in a bare silicon membrane using femtosecond optical pulses and detected with frequency-domain micro-Brillouin light spectroscopy. The population of photoexcited gigahertz phonons displays a hundredfold enhancement as compared with thermal equilibrium. The phonon spectra reveal Stokes–anti-Stokes asymmetry due to propagation, and strongly asymmetric Fano resonances due to coupling between the electron-hole plasma and the photoexcited phonons. This work lays the foundation for studying hypersonic signals in nonequilibrium conditions and, more generally, phonon-dependent phenomena in photoexcited nanostructures.</jats:p>