title: A universal matter-wave interferometer with optical ionization gratings in the time-domain.
abstract: Matter-wave interferometry with atoms1and molecules2has attracted a rapidly growing interest throughout the last two decades both in demonstrations of fundamental quantum phenomena and in quantum-enhanced precision measurements. Such experiments exploit the non-classical superposition of two or more position and momentum states which are coherently split and rejoined to interfere3-11. Here, we present the experimental realization of a universal near-field interferometer built from three short-pulse single-photon ionization gratings12,13. We observe quantum interference of fast molecular clusters, with a composite de Broglie wavelength as small as 275 fm. Optical ionization gratings are largely independent of the specific internal level structure and are therefore universally applicable to different kinds of nanoparticles, ranging from atoms to clusters, molecules and nanospheres. The interferometer is sensitive to fringe shifts as small as a few nanometers and yet robust against velocity-dependent phase shifts, since the gratings exist only for nanoseconds and form an interferometer in the time-domain.
authors.affiliation: University of Vienna, Faculty of Physics, VCQ, Boltzmanngasse 5, A-1090 Vienna, Austria.
authors.forename: Philipp
authors.initials: P
authors.lastname: Haslinger
authors.affiliation: University of Vienna, Faculty of Physics, VCQ, Boltzmanngasse 5, A-1090 Vienna, Austria.
authors.forename: Nadine
authors.initials: N
authors.lastname: Dörre
authors.affiliation: University of Vienna, Faculty of Physics, VCQ, Boltzmanngasse 5, A-1090 Vienna, Austria.
authors.forename: Philipp
authors.initials: P
authors.lastname: Geyer
authors.affiliation: University of Vienna, Faculty of Physics, VCQ, Boltzmanngasse 5, A-1090 Vienna, Austria.
authors.forename: Jonas
authors.initials: J
authors.lastname: Rodewald
authors.affiliation: University of Vienna, Faculty of Physics, VCQ, Boltzmanngasse 5, A-1090 Vienna, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Nimmrichter
authors.affiliation: University of Vienna, Faculty of Physics, VCQ, Boltzmanngasse 5, A-1090 Vienna, Austria.
authors.forename: Markus
authors.initials: M
authors.lastname: Arndt