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Showing 1 to 4 of 4 for “"picosecond ultrasonics"”.
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Polyelectrolyte multilayers for plasmonics and picosecond ultrasonics
… of polyelectrolyte multilayers in plasmonics and picosecond acoustics. The observed samples were fabricated by the spin-assisted layer-by-layer deposition technique that allowed a precise tuning of layer thickness in the range of few nanometers. The first field of interest deals with the …
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Optical characterization of complex mechanical and thermal transport properties
… in conjunction with piezotransducer, ISS, and picosecond ultrasonics measurements to produce the first truly broadband mechanical spectra of a viscoelastic material covering frequencies continuously from mHz to hundreds of GHz. This allowed direct testing of the MCT predicted connection between …
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Toward ultra-broadband photoacoustic spectroscopy of supercooled liquids
… light scattering (ISS) and 8 GHz to 200 GHz with picosecond ultrasonics. In this work, I present advances in photoacoustic techniques with the goal of extending the range of frequencies accessible by these methods. To achieve higher-frequency acoustic generation, experiments on semiconductor …
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Photoexcited hypersonic surface acoustic waves propagating under periodic metal grating
Photoinduced strain gradients in nanometer length scales using periodically patterned grating on a substrate is an attractive way of producing coherent surface acoustic waves (SAW). Ultrafast laser pulses incident on this structure produce constrasting thermal strain in the grating and the …