Active Plasmonic Devices: Based on Magnetoplasmonic by Diana Martín Becerra

By Diana Martín Becerra

This thesis investigates the influence of the magnetic box on propagating floor plasmon polaritons (SPPs), or floor plasmons for brief. exceptionally, it makes a speciality of utilizing the magnetic box as an exterior agent to switch the homes of the SPPs, and as a result reaching energetic 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 resulted in the advance of plasmonic circuitry, that's a key candidate in its place to digital circuitry and conventional optical telecommunication units, because it is quicker than the previous and not more cumbersome than the latter.
Adopting either a theoretical and an experimental perspective, the e-book analyzes the magnetic modulation in SPPs through 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 correct impression on it, easy how one can improve it, its spectral dependence, and the hugely promising probability of utilizing the program for biosensing. The thesis finally arrives on the end that this technique delivers values of modulations just like different energetic equipment utilized in plasmonics.

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7) Imp = (X + Y ), 2 2 where β is the relative phase between the input signal and a reference signal fed to the lock-in at the same frequency as the applied magnetic field. This phase is usually set to zero at the beginning of each measurement. The X and Y components of the AC signal are brought to other channels of the DAQ-card and to the computer. The three signals (DC component, X and Y of the AC component) are registered by a computer, where we have automated the process to calculate and represent all the desired parameters as explained below, and to verify whether there is noise or not, as shown in the next section.

4, where the distribution of |E z |2 at both sides of the interface is shown for two different energies. • SPP excitation As it has been mentioned before, k x depends on the properties of the two materials of the interface (Eq. 9). Moreover, as |εm | > |εd |, this wavevector is always larger √ than the wavevector of light in the dielectric medium (k x > εd k0 ) or, in other words, the SPP dispersion relation is beyond the light line (as can be seen in the representation of Eq. 9 as a function of the energy shown in Fig.

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