Download e-book for kindle: Controlling light emission with plasmonic nanostructures by Robert Jan Moerland.

By Robert Jan Moerland.

ISBN-10: 9036527406

ISBN-13: 9789036527408

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Extra resources for Controlling light emission with plasmonic nanostructures

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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.

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Controlling light emission with plasmonic nanostructures by Robert Jan Moerland.

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