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(Color online) (a) Schematics of the finite-length 1D magneto-optical PC functioning as an optical isolator, where the arrows represent light incident from air. Each primitive cell consists of two high-index BIG layers, with opposite magnetic directions along directions, and a low-index layer. The lattice constant is . (b) Constant-frequency contours of TE modes at . The wave vectors of the incident and the refracted waves are marked with the arrows.
(Color online) Frequencies of the modes in the structure shown in Fig. 1, for the first two bands at the wave vectors . The locations of the wave vectors are depicted in the inset. The red and blue solid curves correspond to wave vectors at and , respectively. The dashed red curves are the mirror reflection of the red solid curves. The shaded regions indicate the operation range of one-way total reflection.
(Color online) (a) Transmittance spectra of front- (the red trace) and back-illuminated (the blue trace) photonic crystal isolators with a thickness of . The calculations are for (red) and (blue). The inset shows the spectrum for a wider frequency range. [(b) and (c)] Steady state magnetic field distribution for under front illumination (b) and back illumination (c).
(Color online) Solid lines are transmittance spectra of a crystal with a thickness of , and with transition layers close to the crystal-air interface for front (red curve) and back (blue curve) illuminations. The angle of incidence is 62.3°. The dashed curves are for a crystal with a thickness of without the transition layers.
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