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(a) Linear transmission of the 700 μm SPhCW, including coupling loss between the access waveguide and the SPhCW. (b) SEM image of the SPhCW with coupling tapers. (c) SEM view of the fabricated structure. Numerical design is surimposed in black and white. (d) View of the coupling taper beween the access plain waveguide and the slot PhCW.
