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I received my Ph. D. in Physics from the Autonomous University of Madrid (UAM) in 1986, with a thesis under the supervision of Prof. José Manuel Calleja. The subject was the use of internal vibrations of molecular groups as a probe of local crystal structure and phase transitions. I used mainly Raman spectroscopy of halo-perovskites and halo-hydrates as a function of temperature and pressure. The work was done in collaboration with J. Bartolomé and F. Palacio at the University of Zaragoza, J. Tornero and F. Jaque at the Autonomous University of Madrid, M. Martini and G. Spinolo at the University of Milano, and K. Syassen and M. Cardona at the Max-Planck Institute for Solid State Research.

Afterwards I worked abroad for a total of four years, 8 months at the University of Hamburg setting up a Raman spectroscopy laboratory, more than 2 years at the IBM Thomas J. Watson Research Center in New York, and 1 year at the Max-Planck Institute for Solid State Research in Stuttgart, in the last two cases studying the electro-optical properties of semiconductor nanostructures.

Since 1988 I am a staff scientist at the Materials Science Institute of Madrid (ICMM-CSIC), first as a Research Associate and since 2006 as a Research Scientist (Investigador Científico).

Throughout my career I have investigated the optical properties of materials and I have published more than 128 papers and a few books.

While working in semiconductor superlattices at IBM, together with Prof. Emilio E. Mendez, we studied by photoluminescence and photocurrent spectroscopy the formation of the Wannier-Stark ladder, whose existence had been the subject of a strong theoretical debate for nearly 40 years. We also measured the coherence length of electron states in semiconductor superlattices and observed for the first time a doubly resonant Raman effect induced by an electric field. I continued working at IBM and then at the Max-Planck (here with Profs. H. T. Grahn and K. Ploog) on the coupling of extended and localized electron states in semiconductor nanostructures.

In 1995 I started the Raman Microscopy Lab to study the nano- and microstructure of materials and devices. I have collaborated with many different groups on optical waveguides, semiconductor nanostructures, coatings and thin films, biological materials, ion and laser irradiation effects, etc.

I have also devoted some efforts to the dissemination of science by contributing to courses, books, book chapters, and popularization activities.