The Instituto de Ciencia de Materiales de Madrid (ICMM) is an institute of the Consejo Superior de Investigaciones Cientificas (CSIC) (Spanish National Research Council) founded in December 1986, that belongs to the Area of Science and Technology of Materials, one of the eight Areas in which the CSIC divides its research activities.


Our mission is to create new fundamental and applied knowledge in materials of high technological impact, their processing and their transfer to the productive sectors at local, national and European scales (the true value of materials is in their use), the training of new professionals, and the dissemination of the scientific knowledge.

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La ciencia en la televisión del futuro
Graziella Almendral   read more


Viscosity of 2D Topological Phases
Barry Bradlyn  read more


Resonancias ferromagnética y antiferromagnética de ondas de spin y transiciones de campo cristalino en RCrO3 (R= Pr, Sm, Er) a temperaturas ultrabajas en la región espectral THz
Néstor E. Massa  read more

Generalized Fano lineshapes reveal exceptional points in photonic molecules

Niccolò Caselli, Francesca Intonti, Federico La China, Francesco Biccari, Francesco Riboli, Annamaria Gerardino, Lianhe Li, Edmund H. Linfield, Francesco Pagliano, Andrea Fiore and Massimo Gurioli

The optical behavior of coupled systems, in which the breaking of parity and time-reversal symmetry occurs, is drawing increasing attention to address the physics of the exceptional point singularity, i.e., when the real and imaginary parts of the normal-mode eigenfrequencies coincide. At this stage, fascinating phenomena are predicted, including electromagnetic-induced transparency and phase transitions. To experimentally observe the exceptional points, the near-field coupling to waveguide proposed so far was proved to work only in peculiar cases. Here, we extend the interference detection scheme, which lies at the heart of the Fano lineshape, by introducing generalized Fano lineshapes as a signature of the exceptional point occurrence in resonant-scattering experiments. We investigate photonic molecules and necklace states in disordered media by means of a near-field hyperspectral mapping. Generalized Fano profiles in material science could extend the characterization of composite nanoresonators, semiconductor nanostructures, and plasmonic and metamaterial devices.

Nature Communications

Modeling of waveguide and near-field resonant transmission in a photonic molecule close to the exceptional point. a Schematics of two coupled-photonic cavities tested by a waveguide, where the e.m. field is propagating from left to right. The waveguide is coupled (red arrows) to the resonator with losses γ1, which is also coupled with coupling strength Κ to the upper resonator with losses γ2. b, c Calculated waveguide transmission change due to the presence of the photonic molecule for different values of κ to reproduce both the Autler–Townes splitting (ATS) case, for κ=1.2Κ0, and the electromagnetic-induced transparency (EIT) case, for κ=0.8Κ0, with γ1/γ2=10 and γ1/γ2=1.1, respectively. The resonant frequencies of the single uncoupled cavities are ω1=ω2=Κ0. d Schematics of the photonic molecule tested by a near-field probe (blue cone) with incoming and outgoing e.m. waves. e, f Calculated transmission change through the near-field probe for the same cases reported in b and c, respectively. All spectra are calculated by means of the coupled-mode theory (Supplementary Note 4). Horizontal dashed lines represent the zero value of each lineshape

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