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Two photonic crystal rings of hexagonal lattice are lying transversely and longitudinally in silicon micro-cantilever at the junction of the microcantilever and the substrate. This unique dual nano-ring (DNR) resonator demonstrates channel drop filter characteristics. When DNR is used as sensing element of a microcantilever sensor, the wavelength shift of resonant peak measured at the backward drop...
A slow-group-velocity- and low-group-velocity-dispersion photonic crystal slab waveguide is designed by using capsule-shaped air holes in hexagonal lattice. The theoretical study shows that adjusting the aspect ratio of holes in the innermost rows can fine-tune the dispersion tail. The presented design can achieve nearly flat-band photonic crystal waveguides with group index of 21-36 over the normalized...
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