title: Dielectric Haloscopes: A New Way to Detect Axion Dark Matter.
abstract: We propose a new strategy to search for dark matter axions in the mass range of 40-400 μeV by introducing dielectric haloscopes, which consist of dielectric disks placed in a magnetic field. The changing dielectric media cause discontinuities in the axion-induced electric field, leading to the generation of propagating electromagnetic waves to satisfy the continuity requirements at the interfaces. Large-area disks with adjustable distances boost the microwave signal (10-100 GHz) to an observable level and allow one to scan over a broad axion mass range. A sensitivity to QCD axion models is conceivable with 80 disks of 1  m^{2} area contained in a 10 T field.
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.
authors.forename: Allen
authors.initials: A
authors.lastname: Caldwell
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.|Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 München, Germany.|CCPP, New York University, New York, New York 10003, USA.
authors.forename: Gia
authors.initials: G
authors.lastname: Dvali
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.
authors.forename: Béla
authors.initials: B
authors.lastname: Majorovits
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Millar
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.
authors.forename: Georg
authors.initials: G
authors.lastname: Raffelt
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.|University of Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Redondo
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.
authors.forename: Olaf
authors.initials: O
authors.lastname: Reimann
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Simon
authors.affiliation: Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Steffen