(Color online) Perspective view of a periodic linear chain of metal particles deposited on a dielectric surface. The chain is optically addressed by the extremity of a SNOM tip. Fluorescent molecules are located at the chain exit.
(Color online) Optical transmittance of a metal particle chain composed of 15 square shaped gold nanoparticles spaced by . The arrow inside the inset frame schematizes the SNOM tip dipole orientation: (in blue) the tip dipole is along the longitudinal axis; (in red) the tip dipole is perpendicular to the chain.
(Color online) Two near-field optical images along the gold particle chain. The images have been calculated for two polarization modes: (A) transverse mode and (B) longitudinal mode . Color scale increasing from dark brown to bright yellow.
(Color) (A) Geometry of the molecular addressing area. The molecules deposited in this area lie at from the dielectric surface supporting the gold structures. (B) Map of the square modulus of the Rabi frequency computed in the addressing area defined in (A). The used wavelength corresponds to the peak of the transverse mode and the transition dipolar moment of the molecule is perpendicular to the chain (see orientation of the red arrows). Rainbow color scale increasing from blue to red.
(Color) Sequence of two maps of molecular decay rate (fluorescing wavelength ) computed in the green area depicted in the device of Fig. 4(a). In these simulations this quantity has been normalized with respect to the natural linewidth . (A) The molecule is aligned along the direction; (B) same as (A) along the direction. Rainbow color scale increasing from blue to red.
(Color) Sequence of six maps that describe the evolution of the expected molecule signal when increasing gradually the laser intensity used to address the plasmonic waveguide (fluorescing wavelength ). These signals have been computed in the green area depicted in the device of Fig. 4(a). (A) Off-saturation absorption regime: Rabi frequency ; (B) ; (C) ; (D) ; (E) ; (F) . Rainbow color scale increasing from blue to red.
Normalized total (solid line) and nonradiative (dashed line) decay rate for molecule at distance from the last gold pad. The molecule is oriented along the axis and is located above the substrate.
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