Tootfinder

Focusing Surface Acoustic Waves with a Plasmonic Hypersonic Lens
Hilario D. Boggiano (Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de F\'isica, Buenos Aires, Argentina), Lin Nan (Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universit\"at M\"unchen, M\"unchen, Germany), Gustavo Grinblat (Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de F\'isica…

Focusing Surface Acoustic Waves with a Plasmonic Hypersonic Lens
Plasmonic nanoantennas have proven to be efficient transducers of electromagnetic to mechanical energy and vice versa. The sudden thermal expansion of these structures after an ultrafast optical pulsed excitation leads to the emission of hypersonic acoustic waves to the supporting substrate, which can be detected by another antenna that acts as a high-sensitive mechanical probe due to the strong modulation of its optical response. Sophisticated fabrication techniques, together with the implemen…