Mechanism of azimuthal mode selection in two-dimensional coaxial Bragg resonators

Ginzburg, N. S. and Peskov, N. Yu. and Sergeev, A. S. and Zaslavsky, V. Yu. and Konoplev, I. V. and Fisher, L. and Ronald, K. and Phelps, A. D. R. and Cross, A. W. and Thumm, M. (2009) Mechanism of azimuthal mode selection in two-dimensional coaxial Bragg resonators. Journal of Applied Physics, 105 (12). -. ISSN 0021-8979 (https://doi.org/10.1063/1.3143019)

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Abstract

The analysis of electrodynamic properties of two-dimensional (2D) Bragg resonators of coaxial geometry realizing 2D distributed feedback was carried out using a quasioptical approach of coupled-wave theory and three-dimensional (3D) simulations. It is shown that the high selectivity of a 2D Bragg resonator over the azimuthal index originates from the topological difference in the dispersion diagrams of the normal symmetrical and nonsymmetrical waves near the Bragg resonance frequency in a double-periodic corrugated unbounded waveguide. For a symmetrical mode near the Bragg frequency it was found that the group velocity tends to zero as well as its first derivative. This peculiarity of the dispersion characteristic provides the conditions for the formation of an eigenmode with a Q-factor essentially exceeding the Q-factors of other modes. The results of the theoretical analysis coincide well with results of 3D simulations using the CST code "MICROWAVE STUDIO" and confirm the high azimuthal selectivity of the system. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3143019]

ORCID iDs

Ginzburg, N. S., Peskov, N. Yu., Sergeev, A. S., Zaslavsky, V. Yu., Konoplev, I. V., Fisher, L., Ronald, K. ORCID logoORCID: https://orcid.org/0000-0002-8585-0746, Phelps, A. D. R. ORCID logoORCID: https://orcid.org/0000-0002-1100-1012, Cross, A. W. ORCID logoORCID: https://orcid.org/0000-0001-7672-1283 and Thumm, M.;
  • Item type:Article
    ID code:28961
    Dates:
    Date
    Event
    15 June 2009
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:15 Nov 2011 15:18
    Last modified:11 Nov 2024 09:39
    URI:https://strathprints.strath.ac.uk/id/eprint/28961
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