Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Figure 30

Directional radiation of fluorescent molecules. (a) SEM image of the fabricated nanoaperture with five corrugations. (b) Configuration to enhance and control the fluorescence emission of molecules diffusing in the central aperture. (c, d) Radiation patterns (intensity distribution in the back focal plane of the 1.2 NA objective) for a single nanoaperture without (a) and with (b) periodic corrugations. (e) Fluorescence intensity enhancement per single molecule as function of the emission polar angle, relative to the open solution reference case. (f) Angular radiation patterns in the polar angle. Figures are reproduced from [168].

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