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Scheme of a planar FEM with 2D Bragg resonator (the electron beam moving in the direction is shown).
(a) Dispersion diagram of the normal waves in the infinite 2D Bragg structure and (b) eigenmodes spectrum of 2D Bragg resonator (the geometrical-optical approach).
Spatial profiles of the partial waves and forming the fundamental mode (, ).
Integral coefficients of transmission and transverse scattering obtained (a) in the frame of geometrical-optical approach and (b) in 3D simulations for symmetrical (black lines) and antisymmetrical (gray lines) wave-beam incidence.
Results of “cold” measurements of (a) transmission and (b) transverse scattering coefficients for normal incidence of plane wave beam and (c) transmission coefficient for inclined incidence of plane wave beam.
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