By Robert Jan Moerland.
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Extra resources for Controlling light emission with plasmonic nanostructures
A relatively simple structure is presented in Fig. 1a. A grounded, perfectly conducting sphere with radius R, centered at the origin is placed near a single charge q1 at a distance of r1 from the center of the sphere. 2. 1 – In (a), the geometry of a point charge q1 near a grounded sphere with radius R is given. The vector r1 describes the distance of the center of the sphere to q1 . To find the potential and the electric field for this configuration, the double charge configuration as described in (b) is solved.
3. 4) where r is the in-plane metal edge–molecule separation, d is the probe–surface separation, φ is the azimuthal angle and A(r, d) and B(r, d) are functions that describe the excitation efficiency and the radiative properties of the molecule. For the y-polarized radiation, A(r, d) and B(r, d) are interchanged. , Ix = Iy , at a given azimuthal angle φ, will result in a periodic modulation of the anisotropy as a function of φ. The measured polarization ratio of the fluorescence is defined as Ix /Iy as well, but here Ix and Iy are the number of photons measured by APD x and APD y, respectively.
7 Conclusion In this chapter, a lens for near fields composed of a negative permittivity slab is investigated. Based on theory and calculations, it is shown that such a lens is capable of imaging the near field with details composed of spatial frequencies up to 5k. It is also shown that the lens is highly dispersive: the response of the lens shows unwanted resonances in k-space when the wavelength of the light is slightly detuned by 25 nm from the optimum. This causes the image to degrade, as confirmed by simulations.
Controlling light emission with plasmonic nanostructures by Robert Jan Moerland.