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arXiv · 2301.11095

Experimental challenges for high-mass matter-wave interference with nanoparticles

Sebastian Pedalino·Bruno Ramírez Galindo·Tomas de Sousa·Yaakov Y. Fein·Philipp Geyer·Stefan Gerlich·Markus Arndt
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Abstract

We discuss recent advances towards matter-wave interference experiments with free beams of metallic and dielectric nanoparticles. They require a brilliant source, an efficient detection scheme and a coherent method to divide the de Broglie waves associated with these clusters: We describe an approach based on a magnetron sputtering source which ejects an intense cluster beam with a wide mass dispersion but a small velocity spread of 10%. The source is universal as it can be used with all conducting and many semiconducting or even insulating materials. Here we focus on metals and dielectrics with a low work function of the bulk and thus a low cluster ionization energy. This allows us to realize photoionization gratings as coherent matter-wave beam splitters and also to realize an efficient ionization detection scheme. These new methods are now combined in an upgraded Talbot-Lau interferometer with three 266 nm depletion gratings. We here describe the experimental boundary conditions and how to realize them in the lab. This next generation of near-field interferometers shall allow us to soon push the limits of matter-wave interference to masses up to 10 megadaltons.

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Sebastian Pedalino, Bruno Ramírez Galindo, Tomas de Sousa, Yaakov Y. Fein, Philipp Geyer, Stefan Gerlich, Markus Arndt. 2023-01-26. Experimental challenges for high-mass matter-wave interference with nanoparticles. https://arxiv.org/abs/2301.11095

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