title: Resonant transmission of cold atoms through subwavelength apertures.
abstract: Recently, it has been observed that transmission of light through subwavelength apertures, which is usually negligible, can be significantly enhanced when surface plasmons are resonantly excited. Here we introduce the idea that similar effects can be expected for cold atoms in structures supporting surface matter waves. We show that surface matter waves are possible in properly designed structures, and then we theoretically demonstrate 100% transmission of rubidium atoms through an array of slits much narrower than the de Broglie wavelength of the atoms. Our results open up the possibility of using surface matter waves to control the flow of neutral atoms.
authors.affiliation: Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
authors.forename: Esteban
authors.initials: E
authors.lastname: Moreno
authors.forename: A I
authors.initials: AI
authors.lastname: Fernández-Domínguez
authors.forename: J Ignacio
authors.initials: JI
authors.lastname: Cirac
authors.forename: F J
authors.initials: FJ
authors.lastname: García-Vidal
authors.forename: L
authors.initials: L
authors.lastname: Martín-Moreno