By Diana Martín Becerra

This thesis investigates the impression of the magnetic box on propagating floor plasmon polaritons (SPPs), or floor plasmons for brief. in particular, it makes a speciality of utilizing the magnetic box as an exterior agent to change the homes of the SPPs, and consequently reaching lively units. floor plasmons are evanescent waves that come up at metal–dielectric interfaces. they are often strongly limited (beyond the sunshine diffraction limit), and supply a robust enhancement of the electromagnetic box on the interface. those waves have ended in the improvement of plasmonic circuitry, that's a key candidate as a substitute to digital circuitry and standard optical telecommunication units, because it is quicker than the previous and not more cumbersome than the latter.
Adopting either a theoretical and an experimental standpoint, the publication analyzes the magnetic modulation in SPPs by way of an interferometer engraved in a multilayer combining Au and Co. during this interferometer, which acts like a modulator, the SPP magnetic modulation is studied intimately, as are the parameters that experience a proper impression on it, basic how one can improve it, its spectral dependence, and the hugely promising probability of utilizing the program for biosensing. The thesis eventually arrives on the end that this system provides values of modulations just like different energetic equipment utilized in plasmonics.

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Interferometry is known as a very sensitive and reliable technique both at the micro- and macro-scale, and it has been applied during many years and in many areas such as astrophysics [1, 2], imaging [3–5], sensing [6], or integrated photonics [7, 8]. One of the most famous experiments regarding interferometry took place in 1887, when Michelson and Morley built an interferometer to detect the presence of ether in the space and see its effect on the speed of light [9]. The experiment did not succeed, resulting in that there was no ether at all, but the use of this kind of interferometer to have very accurate results was then well established.

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