ARE INTERESTED YOU IN A MASTER THESIS PROJECT?:
I can propose you these projects:
Title: Hybrid Optical/Electronic Artificial Neural Networks Based on 2D Electron Gases.
The candidate will be trained in optical and transport characterization. Optical experiments will be carried out using high-numerical-aperture focusing in confocal microscopy with in-situ applied electric pulses on devices defined by means of optical and electron-beam lithography. The devices are defined on materials that host 2D electron gases (2DEGs) that respond to light with changes in conductance that mimic the synaptic plasticity of brains. Algorithms will be used to apply learning rules based on the synaptic-like photoconductive responses of artificial networks based on 2DEGs.
For more information on 2DEG properties:  G. Herranz et al., Nature Communications 6, 6028 (2015);  J. Gazquez et al., Phys. Rev. Lett. 119, 106102 (2017).
Title: Metasurfaces for Optical Telecommunications.
The successful candidate will be trained in magneto-optical spectroscopy with wavelengths in the near infrared and the visible. He/she will be also trained in a second kind of methodology, consisting of real- and reciprocal space mapping of optical responses with diffraction limitation [see our Reference 5]. These techniques allow the visualization down to just a few of hundreds of nanometers, enabling direct imaging of small devices. At the same time, it enables imaging of dispersion relations (frequency versus wavevector) of light propagating in photonic media (see, e.g., Figure 4 of Ref. ). The samples under analysis are obtained by structuring the matter (metals, dielectrics) using optical and electron-beam lithography to define small optical devices with length scales from around 100 nm up to around 100 microns.
For more information:  M. Rubio-Roy et al., Langmuir, 28, 9010 (2012);  J.M. Caicedo et al., ACS Nano, 5 2957 (2011);  J.M. Caicedo et al., Phys. Rev. B 89, 045121 (2014);  O. Vlasin et al., Phys. Rev. Applied. 2, 054003 (2014),  O. Vlasin et al., Scientific Reports 5 15800 (2015).  B. Casals et al., Physical Review Letters, 117, 026401 (2016)