Author: gherranz

WELCOME NEW STUDENTS (Bachelor Theses)

WELCOME NEW STUDENTS (Bachelor Theses):

Xavi Domingo: Project “Neuromorphic Photonic Devices using Photoconductive Quantum Wells”

Xavi will work on designing photoconductive wells to generate output electric signals mimicking the spiking activity of biological neurons.

 

 

Òscar Díaz: Project “Neuromorphic Photonic Devices using Photoconductive Quantum Wells”

Òscar will work on the simulation of photoconductive responses of nonbiological synapses based on photoconductive quantum wells

 

 

Guillem Müller: Project “Topological Photonic Metasurfaces”

 

Guillem will work on the design of topological photonic metasurfaces, with chiral and helical edge propagation modes

Paper published in Nature Physics about “Giant topological Hall Effect”

Our group has collaborated in a study published in Nature Physics about a “Giant topological Hall Effect”

The study, led by the group of Manuel Bibes, from Unité Mixte de Physique CNRS/Thales (France), published in Nature Physics on October 15, 2018, describes the discovery of a giant topological Hall effect arising from the topology of spatial distribution of spin textures.

 

Invited Seminar at ICMAB given by Dr. Lingfei Wang, from the Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul.

The seminar will be given on Friday, September 28, 12 pm at Sala d’Actes of ICMAB, Bellaterra.

TITLE: Ferroelectrically tunable magnetic skyrmions in ultrathin
oxide heterostructures

Contributions to the upcoming Workshop on Oxide Electronics WOE25 conference.

Workshop on Oxide Electronics, WOE25

October 1-3, Les Diablerets, Switzerland

Contributed Talk:

“  In-situ imaging of electric field-induced ferroelastic domain motion in SrTiO3.“

YOU CAN ALSO SEE THE POSTER PRESENTED BY YU CHEN:
“Photoresponse dynamics and photoconductivity mapping in LaAlO3/SrTiO3 interfaces”

 

Talk given by Mikko Kataja @EMRS Fall Meeeting, Magnetoplasmonics

The talk was delivered on 18th September, at the EMRS Fall Meeting 2018, Warsaw.

Symposium K: Nanomaterials- electronics & -photonics

Title: “Large diffracted transverse magneto-optic Kerr effect in magnetoplasmonic crystals”

 

Phase-matching conditions are exploited to enable nonreciprocal optical propagation and enhanced magneto-optic responses in magnetoplasmonic systems [1]. Here we show that exploiting diffraction in conjunction with plasmon excitations adds further versatility and flexibility in the design of photonic systems. As a testbed we analysed transverse magneto-optic Kerr (TMOKE) responses in magnetoplasmonic gratings etched into gold/cobalt multilayers [2]. The grating coupler was chosen as the simplest system where we can combine the three distinct phenomena: magneto-optics, diffraction and plasmonics. Angular resolved measurements revealed narrow line-shape plasmon resonances, enabling large diffracted magneto-optical intensity effects. We show that exploiting diffraction in magnetoplasmonic crystals allows unexpectedly large TMOKE responses above that exceed 3% – one of order of magnitude larger than conventional TMOKE. Our results pave the way towards using magneto-optical modulation of SPPs to build non-reciprocal, active photonic components. We anticipate that our results can be used to design more complex diffractive surfaces, such as plasmonic metasurfaces, with the objective to enable creation of novel non-reciprocal photonic devices. [1] V. I. Belotelov et al., Nat.Nanotechnol. 6, 370 (2011). [2] R. Cichelero et al., submitted.