120 citations · 156 across the 5 of their papers we have counts for
5 papers
Single-shot capable surface acoustic wave dispersion measurement of a layered plate
Georg Watzl, Stefan Eder, Martin Ryzy +4
Established techniques for characterizing a layer on a substrate system via surface acoustic wave (SAW) dispersion measurement are often slow due to the need for scanning excitatio…
Breaking the Resolution limit in Photoacoustic Imaging using Positivity and Sparsity
Peter Burgholzer, Johannes Bauer-Marschallinger, Mike Hettich +1
In this tutorial, we aim to directly recreate some of our "aha" moments when exploring the impact of heat diffusion on the spatial resolution limit of photothermal imaging. Our obj…
Picosecond ultrasonics with a free-running dual-comb laser
Justinas Pupeikis, Benjamin Willenberg, Francois Bruno +10
We present a free-running 80-MHz dual-comb polarization-multiplexed solid-state laser which delivers 1.8 W of average power with 110-fs pulse duration per comb. With a high-sensiti…
Lifetimes of Confined Acoustic Phonons in Ultra-Thin Silicon Membranes
J. Cuffe, O. Ristow, E. Chávez +8
We study the relaxation of coherent acoustic phonon modes with frequencies up to 500 GHz in ultra-thin free-standing silicon membranes. Using an ultrafast pump-probe technique of a…
Observation of Zone-Folded Acoustic Phonons in Terahertz Quantum Cascade Lasers using Picosecond Ultrasonics
Axel Bruchhausen, Mike Hettich, James Lloyd-Hughes +5
We have investigated the time-resolved vibrational properties of terahertz quantum cascade lasers by means of ultra-fast laser spectroscopy. By the observation of the acoustic fold…