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arXiv · 2507.10117

Young's double-slit experiment with anisotropic GHz surface acoustic waves on gallium arsenide

Thomas Steenbergen·Matteo Fisicaro·Krystian Czerniak·Matthijs Rog·Kaveh Lahabi·Wolfgang Löffler
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Abstract

We demonstrate Young's double-slit experiment with GHz surface acoustic waves (SAWs) on gallium arsenide (GaAs). This experiment differs from the well-known optical case due to the anisotropy of SAW propagation on GaAs. We generate SAWs using an interdigital transducer (IDT), and the double-slit is realized by focused ion beam milled grooves which block the SAWs. We measure the out-of-plane SAW displacement with an optical scanning interferometer and apply a spatial Fourier filtering technique, enabling the observation of the two-slit interference pattern, as well as higher order diffraction and near field interference effects. We find reasonable agreement between the measured far-field interference pattern and anisotropic Huygens-Fresnel simulations based on previously reported angle-dependent SAW velocities on GaAs.

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Thomas Steenbergen, Matteo Fisicaro, Krystian Czerniak, Matthijs Rog, Kaveh Lahabi, Wolfgang Löffler. 2025-07-14. Young's double-slit experiment with anisotropic GHz surface acoustic waves on gallium arsenide. https://arxiv.org/abs/2507.10117

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