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Sculpting nanometer-sized light landscape with plasmonic nanocolumns
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) plan view and cross-section transmission electron microscopy image of the sample taken from Ref. 36. (b) Extinction spectra recorded at 75° angle of incidence with p- (continuous line) and s- (dashed line) polarization.

Image of FIG. 2.
FIG. 2.

Extinction cross section of a square array of silver nanorods for an incident electric field polarized along the long axis (a) or the short axis (b) of the nanorods. (c) Evolution of the position of the longitudinal and TSPRs with the number of nanorods in the array. The dashed (resp. dotted) line indicates the wavelength of longitudinal (resp. transverse) SPR of an infinite square array of nanorods.

Image of FIG. 3.
FIG. 3.

Extinction cross section of an array of nine silver nanorods with (i) identical perfect rod shape (solid line), (ii) identical rod shape with periodic shrinks mimicking the real morphology of NCls (dash dotted), and (iii) shape similar to case (ii) but with shape fluctuations (dashed). (a) s-polarization. (b) p-polarization. (c) p-polarized electric field with incidence angle .

Image of FIG. 4.
FIG. 4.

Calculated extinction cross section of a square array of 21 silver shrinked nanorods (solid line) for a p-polarized electric field with incidence angle and corresponding experimental absorption spectrum (dash dotted).

Image of FIG. 5.
FIG. 5.

(a) Investigated configuration: the incident electric field is perpendicular to the major axis of the nanorods. (b) Optical near-field spectra computed 1 nm above a single (solid line) or two silver nanorods separated by 2.4 nm (dashed) or 3.6 nm (dotted). The spectra have been calculated at location 1 (blue) or 2 (red). The metallic nano-objects are embedded in .

Image of FIG. 6.
FIG. 6.

Normalized optical near-field intensity distribution in a plane at height above two silver nanorods embedded in . The incident electric field is in the same configuration as Fig. 5(a) with wavelength . The nanorods represented by white circles are 2.4 nm in diameter and separated by 2.4 nm.

Image of FIG. 7.
FIG. 7.

Normalized optical near-field intensity distribution computed at three different heights above seven silver nanorods 2.4 nm in diameter. (a), (b), and (c) represent the evolution of the intensity map when increasing the observation plane distance . Both spacing between nanorods and incident wavelength are fixed at 2.4 and 390 nm, respectively.

Image of FIG. 8.
FIG. 8.

Normalized optical near-field intensity distribution computed for two different wavelengths above silver nanorods, 2.4 nm in diameter, and organized in the plane (XOY) as the acronym N F (for near field). The observation plane is located 1 nm from the NCl tops. (a) Top view of the pattern. [(b) and (c)] Near-field intensity maps computed for and , respectively.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Sculpting nanometer-sized light landscape with plasmonic nanocolumns