Jobs

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: [1] G. Herranz et al., Nature Communications 6, 6028 (2015); [2] 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. [1]). 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: [1] M. Rubio-Roy et al., Langmuir, 28, 9010 (2012); [2] J.M. Caicedo et al., ACS Nano, 5 2957 (2011); [3] J.M. Caicedo et al., Phys. Rev. B 89, 045121 (2014); [4] O. Vlasin et al., Phys. Rev. Applied. 2, 054003 (2014), [5] O. Vlasin et al., Scientific Reports 5 15800 (2015). [6] B. Casals et al., Physical Review Letters, 117, 026401 (2016)

 

PLEASE, STAY TUNED FOR FUTURE OPEN POSITIONS IN THE LAB!

 

RECENTLY OPENED  POSITIONs IN THE LAB (NOW CLOSED): 

The INPhINIT “la Caixa” Fellowship Program @ ICMAB was closed in February 1st 2018.

INPhINIT is promoted by the “la Caixa” Foundation with the aim of supporting the best scientific talent and fostering innovative and high-quality research in Spain by recruiting outstanding international students and offering them an attractive and competitive environment for conducting research of excellence.

INPhINIT recruits per call 57 Early-Stage Researchers of any nationality, who enjoy a 3-year employment contract at the Research Centre of their choice among those selected and awarded by the Spanish Ministry of Economy and Competitiveness (“Severo Ochoa” centres of excellence and “Maria de Maeztu” units of excellence) and the Spanish Ministry of Health (“Carlos III centres of excellence”). In addition, researchers establish a personal career development plan including trasnational, intersectoral and interdisciplinary mobility opportunities, and attend a full range of complementary training courses and workshops.

All details about job conditions and submission deadlines can be found here.

Brief description of my research projects in INPhINIT “la Caixa” Fellowship Program:

Low-Loss Multifunctional Plasmonic Metamaterials

Artificial metamaterials (MMs) can exhibit extraordinary electromagnetic responses that transcend the properties of natural materials. The present Project aims at exploiting plasmons in multifunctional MMs for applications in optical communications and light harvesting. One important challenge is associated with overcoming losses that dampen plasmons. One solution is to combine MMs that incorporate metals with reduced carrier concentration by mixing them with nonmetals, e.g., silicides, nitrides or oxide intermetallics. One particularly interesting material is TiN, which has optimum optical properties in the visible and is compatible with CMOS-semiconductor technologies. With this in mind, the successful candidate will synthesize and study the optical properties of multifunctional plasmonic MMs that incorporate low-loss metals, with the objective to achieve highly performant nanophotonic devices. The research on these materials is relevant for technological applications in photovoltaic cells and integrated on-chip communication networks. The student 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. The main topics and selected publications of the host group are given: (i) Manipulation of the electronic states in quantum wells: Physical Review Letters 109, 226601 (2012), Physical Review Letters 113, 156802 (2014), Nature Communications 3, 1189 (2012); Nature Communications 6, 6028 (2015), Phys. Rev. Lett. 119, 106102 2017 (ii) Tailoring optical activity exploiting photonic effects (ACS Nano, 5, 2957(2011), Nanoscale 3, 4811 (2011)), plasmons (Langmuir, 28, 9010 (2012), Physical Review Applied 2, 054003 (2014) or polarons (Phys. Rev. Lett. 117, 026401 (2016)).

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 candidate 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. The main topics and selected publications of the host group are given: (i) Manipulation of the electronic states in quantum wells: Physical Review Letters 109, 226601 (2012), Scientific Reports 2, 758 (2012), Physical Review Letters 113, 156802 (2014), Nature Communications 3, 1189 (2012);  Nature Communications 6, 6028 (2015)  (ii) Tailoring optical activity exploiting photonic effects (ACS Nano, 5, 2957(2011), Nanoscale 3, 4811 (2011)),  plasmons (Langmuir, 28, 9010 (2012), Physical Review Applied 2, 054003 (2014) or polarons (Phys. Rev. Lett. 117, 026401 (2016)).