Figure 2: PhC design.
From: Integrable microwave filter based on a photonic crystal delay line
(a) SEM image of the tapered coupler at the end of the PhC waveguides (the scale bar is 1 μm). (b) Optical image of the chip containing the photonic crystal waveguides (green) and the coupling lensed fibres (the scale bar is 250 μm). (c) Design of the PhC waveguide with the anti-symmetric shift (of magnitude T×a) of the first row of holes. (d) Measured (markers) and calculated (solid) dispersion (group index versus wavelength) for the TE and TM modes, showing good agreement. For details, see Methods.
