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(a) 3D-FDTD simulation of the fundamental mode of the APCN at 1590 nm. A scheme of the photonic structure is superimposed to the simulation. (b) Near-field mapping of the APCN with a metal-coated aperture sharp tip () (scalebars: 1.55 μm).
Emission spectra of the APCN coupled to (a) the opaque metal-coated and (b) the transparent dielectric microtips, as a function of the distance (Z) between the microtips and the nanocavity.
(a) Resonance wavelength () and (b) quality factor of an APCN coupled to an opaque metal-coated (square) and a transparent dielectric (circle) microtip, as a function of the distance (Z) between the two structures (in logarithmic scale).
Simulation with 3D-FDTD method of the evolution of the resonance wavelength () of the APCN when an aluminum (squares) and a dielectric (circles) flat semi-infinite medium approaches the structure. is plotted as a function of the distance Z between the two devices.
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