Jose María Ripalda

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A. G. Taboada, A. M. Sánchez, A. M. Beltrán, M. Bozkurt, D. Alonso-Álvarez, B. Alen, A. Rivera, J. M. Ripalda, J. M. Llorens, J. Martín-Sánchez, Y. González, J. M. Ulloa, J. M. Garcia,' S. I. Molina, and P. M. Koenraad Instituto de Microelectrónica de Madrid, CNM (CSIC), C/Isaac Newton 8, PTM, 28760 Tres Cantos, Madrid, Spain Department of Physics,(More)
A compact minicryostat has been well adapted on the hard x-ray microprobe ID22 of the European Synchrotron Radiation Facility. For variable low-temperature investigations, its special technical design provides precise scanning microscopy and allows easy access for multiple detection modes. Based on x-ray excited optical luminescence technique on the(More)
The moth-eye structure has been proposed several times as an antireflective coating to replace the standard optical thin films. Here, we experimentally demonstrate the feasibility of a dielectric moth-eye structure as an antireflective coating for high-index substrates, like GaAs. The fabricated photonic crystal has Si3N4 cones in a square lattice, sitting(More)
The authors have studied the use of antimony for the optimization of the InAs/GaAs 001 self-assembled quantum dot QD luminescence characteristics in the 1.3 m spectral region. The best results have been obtained by capping InAs QDs with 2 ML of GaSb grown on top of a 3 ML GaAs barrier separating the InAs and the GaSb layers. This results in an order of(More)
D. Alonso-Álvarez, B. Alén, J. M. Ripalda, J. M. Llorens, A. G. Taboada, F. Briones, M. A. Roldán, J. Hernández-Saz, D. Hernández-Maldonado, M. Herrera, and S. I. Molina IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, 28760 Tres Cantos, Spain Departamento de Ciencia de los Materiales e Ing. Metalúrgica y Q. I., Universidad de Cádiz,(More)
In this work we show two different procedures of fabrication aiming towards the systematic positioning of single InAs quantum dots (QDs) coupled to a GaAs photonic crystal (PC) microcavity. The two approaches are based on the molecular beam epitaxial (MBE) growth of site-controlled QDs (SCQDs) on pre-patterned structures. The PC microcavity (PCM) is(More)
Electrical contacts on the top surface of solar cells and light emitting diodes cause shadow losses. The phenomenon of extraordinary optical transmission through arrays of subwavelength holes suggests the possibility of engineering such contacts to reduce the shadow using plasmonics, but resonance effects occur only at specific wavelengths. Here we describe(More)
Related Articles Replica theory of the rigidity of structural glasses J. Chem. Phys. 136, 214108 (2012) Direct and quantitative evidence for buckling instability as a mechanism for roughening of polymer during plasma etching Appl. Phys. Lett. 100, 233113 (2012) Nonlocal elasticity based magnetic field affected vibration response of double single-walled(More)