2008/01/21 by Jean-Michel le Floch, Michael E. Tobar, Dominique Cros +1 · 3 citations
Engineering · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Advanced Frequency and Time Standards #Photorefractive and Nonlinear Optics #physics.ins-det #physics.optics
paper · pdf · doi:10.1063/1.2828025
published as Appl.Phys.Lett.92:032901,2008
openalex publication_date 2008/01/21 · arxiv created 2008/07/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A Bragg resonator uses dielectric plates within a metallic cavity to confine the energy within a central free space region. The importance of the permittivity is shown with a better Q factor possible using higher permittivity materials of larger intrinsic dielectric losses. This is because the electric energy in the reflectors decreases proportionally to the square root of permittivity and the coupling to the metallic losses decrease linearly. In a sapphire resonator with a single reflector pair a Q factor of 2.34×105 is obtained, which may be improved on by up to a factor of 2 using higher permittivity materials.