By Dror Sarid
Introducing graduate scholars in physics, optics, fabrics technology and electric engineering to floor plasmons, this e-book additionally covers guided modes at planar interfaces of metamaterials with unfavorable refractive index. The physics of localized and propagating floor plasmons, on planar movies, gratings, nanowires and nanoparticles, is built utilizing either analytical and numerical suggestions. Guided modes on the interfaces among fabrics with any blend of confident or adverse permittivity and permeability are analyzed in a scientific demeanour. purposes of floor plasmon physics are defined, together with near-field transducers in heat-assisted magnetic recording and biosensors. assets at www.cambridge.org/9780521767170 contain Mathematica code to generate figures from the ebook, colour types of many figures, and prolonged dialogue of issues comparable to vector diffraction concept.
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Extra resources for Modern Introduction to Surface Plasmons: Theory, Mathematica Modeling, and Applications
Sample text
R - wt)] = cos(k· r - wt) + i sin(k· r - wt), and the physical meaning of the field is related to the real part of the exponent, hence the asterisk. 15 Poynting vector 41 fields are evaluated. 176) {5}dy dx. Note that in this case the power is finite because the fields decay in the ±x-directions and have a finite width in the y-direction. 2 Matrixform ofthe Poynting vector We now extend the definition of the averaged Poynting vector to waves that are not necessarily plane-parallel, namely to single- and double-interface modes.
H1,z Substrate Fig. 5 Schematic diagram of a single-interface structure composed of a substrate and cover supporting a TE mode propagating along the z-direction with a propagation constant f3. For the TE mode, the electric field has one component, Ei,y, and the magnetic field has the two components, Hl,x and Hl,z' TE mode has only one component, E 1, y, oriented along the y-direction. Here the subscript I denotes that the field is associated with a single-interface structure. The magnetic field, being proportional to V' x E, has two components, HI, x and Hi, z, pointing along the x- and z-directions, respectively.
The electric field of a TE mode has only one component, E z,y, oriented along the y-direction, having a subscript 2 that denotes that it is associated with a double-interface structure. The magnetic field, being proportional to V' x E, has two components, Hz, x and Hz, z' pointing along the x- and z-directions, respectively. We shall suppress the time dependence of the electric and magnetic fields. 2 Electric field along the y-direction The cross-section of the profile of the electric field as a function of x has to be evanescent in the cover and substrate, decaying exponentially in a direction away from both interfaces.