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Peculiarities of mode spectrum in two-dimensional Bragg structures

Ginzburg, N.S. and Peskov, N.Y. and Sergeev, A.S. and Phelps, A.D.R. and Cross, A.W. (2005) Peculiarities of mode spectrum in two-dimensional Bragg structures. Optics Communications, 250 (4-6). pp. 309-315. ISSN 0030-4018

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Abstract

The fundamental difference in the eigenmode spectrum for traditional one-dimensional (1D) periodical Bragg structures and novel two-dimensional (2D) periodical Bragg structures of planar and coaxial geometry is discussed. In the case of 1D Bragg structures, the eigenmode frequencies are located outside the Bragg reflection zone while for 2D Bragg structures the highest Q-factor modes are located just near to the frequency of Bragg resonance and the mechanism for the formation of these modes is related to the coupling of the longitudinal and transverse propagating wave fluxes. The main eigenmode possesses a Q-factor which substantially exceeds the Q-factor of the other modes even in the case when the system transverse size is much greater than the wavelength that encourage the use of 2D Bragg structures for mode selection in powerful oscillators with oversized microwave systems.

Item type: Article
ID code: 31260
Keywords: free-electron laser, Bragg resonator, microwaves, Physics, Physical and Theoretical Chemistry, Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 13 Jul 2011 09:56
    Last modified: 05 Sep 2014 09:06
    URI: http://strathprints.strath.ac.uk/id/eprint/31260

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