Figure 5 | Scientific Reports

Figure 5

From: Nanoscale volume confinement and fluorescence enhancement with double nanohole aperture

Figure 5

Numerical simulations of LDOS enhancement for a dipolar emitter located in the center of the DNH gap.

In (a), three different dipole orientations are displayed, the case when the dipole is oriented parallel to the apex provides the highest LDOS enhancement. In (b), the orientation-averaged LDOS enhancement is plotted as function of the emission wavelength (solid line). The normalized Alexa Fluor 647 emission spectrum is shown in dashed gray line and the 650–690 nm region used experimentally for fluorescence collection is indicated.

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