Apply for PhD research projects! Call opens on October 1st. Deadline November 30th.

The DOC-FAM COFUND doctoral program @ ICMAB opens on October 1st. The deadline for submission is 30th november. All details about job conditions and submission deadlines can be found here.

Brief description of my research projects:

-Dynamic modulation of plasmons in multifunctional nanophotonic circuits

When light interacts with metals at the nanoscale, free electrons –which resonate collectively at their natural frequency– reemit electromagnetic waves in the form of plasmons. These are evanescent waves, which have the property of squeezing and boosting the energy density into subwavelength regions. Because of these properties, plasmons are used in nanophotonic applications, e.g., biochemical sensing. The present project aims at exploiting plasmons as data carriers along nanoscale circuits, moving into novel unexplored areas. The underlying premise is that plasmon modulation should enable more efficient data routing through optical interconnects in multicore chips. Different strategies will be explored: (i) First, by exploiting plasmon propagation through metal/ferroelectric interfaces, to change the optical properties by electric fields. Secondly, by incorporating magnetism in two ways, viz.: the propagation of plasmons along magnetic metal/ferroelectric interfaces and (ii.2) by exploiting spin-polarized currents generated by spin-pumping in the radiofrequency range (GHz).
The fellow will be supervised by Dr. Gervasi Herranz, research leader in functional oxide interfaces and photonics. Dr. Herranz aims his scientific activity at the research on new materials for electronics and photonics. he/she will access our advanced optical laboratory, which includes optical spectroscopy and high-resolution imaging tools. The fellow will be acquainted with state-of-the art techniques that allow real-space mapping of optical responses with diffraction limitation.

-Dynamical modulation of electron spins with microwaves

At present, most of the digital information is stored in nonvolatile magnetic bits, e.g., in the hard disk drives of PCs and laptops, while data is processed in volatile memory units -e.g., in CPUs-. In order to extend the advantages of nonvolatility to processing units (i.e., adding to them the capability of permanent storage), efficient ways of manipulating the magnetism with electric currents are intensively researched, so that the information encoded in the magnetic bits (viz. with spins in up/down states) can be changed dynamically with electric pulses. In addition, over the past few years, the scientists have realized that some magnetic nanostructures (for instance, Pt/Co stacks) can host topological spin states (e.g. skyrmions), with a vast potential for new applications. With this foreground in view, we propose to modulate the magnetism of magnetic nanodevices using surface acoustic waves controlled by microwave (mw) pulse fields, in the technological relevant range of the GHz, where most telecommunication applications work (e.g., cell phones, RFIDs, Wifi, etc.).
The fellow will be supervised by Dr. Gervasi Herranz, research leader in functional oxide interfaces and photonics. Dr. Herranz aims his scientific activity at the research on new materials for electronics and photonics. He/she will access our advanced optical laboratory, which includes optical spectroscopy and high-resolution imaging tools. The fellow will follow an intensive training, so as to ensure a solid understanding of the techniques. Particularly important, the student will be acquainted with state-of-the art techniques that allow real-space mapping of optical responses with diffraction limitation.

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