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(Color online) (a) Double-heterostructure microcavity with lattice period and hole radius . Fluid-filled holes have a refractive index ; the rest are . Refractive index of the slab is . (b) Dispersion relation for regular (dashed) and fluid-filled (solid) photonic crystal waveguides. The difference between the curves is labeled mode gap.
(Color online) (a) Microscope image of W1 PCS structure with a fluid-filled section. [(b) and (c)] Experimental transmission from the taper when it is coupled to the W1 PCS, (b) before and (c) after the fluid filling. (d) Dispersion curves of the silica taper and the W1 PCS, both fluid filled (triangles) and unfilled with fluid (circles), as calculated separately using a 3D plane-wave method. Used wavevector is taken along the waveguide direction. Where the taper curve intersects with W1 PCS curves, phase matching (coupling) occurs. Trace (c) displays additional FP resonances, which can be related to the calculated dispersion curve of the fluid-filled W1 PCS.
(Color online) (a) Image of W1 PCS structure with a fluid-filled section. (b) Corresponding experimental transmission when probed by evanescent coupling displaying high- resonance.
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