Scattering of a cross-polarized linear wave by a soliton at an optical event horizon in a birefringent nanophotonic waveguide

The scattering of a linear wave on an optical event horizon, induced by a cross polarized soliton, is experimentally and numerically investigated in integrated structures. The experiments are performed in a dispersion-engineered birefringent silicon nanophotonic waveguide. In stark contrast with co-polarized waves, the large difference between the group velocity of the two cross-polarized waves enables a frequency conversion almost independent on the soliton wavelength. It is shown that the generated idler is only shifted by 10 nm around 1550 nm over a pump tuning range of 350 nm. Simulations using two coupled full vectorial nonlinear Schr\"odinger equations fully support the experimental results

Generation of ultra broadband coherent supercontinuum in tapered and dispersion managed silicon nanophotonic waveguides

Tapered and dispersion managed (DM) silicon nanophotonic waveguides are investigated for the generation of optimal ultra broadband supercontinuum (SC). DM waveguides are structures showing a longitudinally dependent group velocity dispersion that results from the variation of the waveguide width with the propagation distance. For the generation of optimal SC, a genetic algorithm has been used to find the best dispersion map. This allows for the generation of highly coherent supercontinuums that span over 1.14 octaves from 1300 nm to 2860 nm and 1.25 octaves from 1200 nm to 2870 nm at -20 dB level for the tapered and DM waveguides respectively, for a 2 $\mu$m, 200 fs and 6.4 pJ input pulse. The comparison of these two structures with the usually considered optimal fixed width waveguide shows that the SC is broader and flatter in the more elaborated DM waveguide, while the high coherence is ensured by the varying dispersion.Comment: arXiv admin note: substantial text overlap with arXiv:1610.0566

La militancia femenina en la resistencia peronista a través de la prensa opositora (1955-1958) : Nora Lagos y los periódicos La Argentina y Soberanía

En este artículo nos proponemos incursionar en la participación femenina en la Resistencia peronista, proceso que tuvo lugar en Argentina a partir del derrocamiento de Juan D. Perón en 1955 y hasta comienzos de la década del '60. Nuestro enfoque parte del análisis de una biografía, la de Nora Lagos, cuya militancia se canalizó a través de la actividad periodística en una prensa eminentemente política y de oposición al gobierno de la Revolución Libertadora. Las observaciones que hemos realizado a partir del examen de los periódicos que Nora publicó, La Argentina y Soberanía, los testimonios que han quedado sobre ella en otros periódicos y libros, y entrevistas a familiares y personas que la conocieron, nos han permitido reconstruir aspectos de su trayectoria. A partir de ello, proponemos reflexionar sobre las motivaciones que se ponen en juego en la práctica militante, la articulación público – privado y la relación entre militancia y vida cotidiana. Asimismo, y en relación con lo anterior, procuramos pensar acerca del lugar que han ocupado las mujeres en los relatos sobre la Resistencia peronista, ya sea de carácter militante o académico, y en la historiografía en general, y las implicancias de género que han influido en ello.In this article, we attempt to address the female participation in the Peronist Resistance, a process which took place in Argentina after Juan D. Perón's overthrow in 1955 and the beginning of the 60's. Our approach is based on the analysis of Nora Lagos biography, a journalist who channeled her militancy in an eminently politicized press which was against the Revolución Libertadora. The findings we gathered from the analysis of the newspapers published by Nora, La Argentina and Soberanía, the testimonies about her in other newspapers and books, and interviews to her closest relatives and people who know her, have allowedus to trace some aspects of her carrier. From these findings we attempt to reflect on the motivations involved in militant practice, the public and private articulation and the relationship between militancyand everyday life. Moreover, and related to what was previously said, we attempt to think about the role which women have played in the accounts on the Peronist Resistance, both academic and militant, and in historiography in general; and the gender implications which have affected it.Fil: Gorza, Anabella. Consejo Nacional de Investigaciones Científicas y Técnica

La Resistencia peronista desde una perspectiva de género (1955-1960) : Algunas reflexiones sobre su abordaje

Fil: Gorza, Anabella. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina

Misas, ofrendas y militancia : Los actos religiosos como expresiones políticas de la Resistencia peronista

Fil: Gorza, Anabella. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina

Participación política de las mujeres en la Resistencia peronista; entre la permanencia y el cambio (1955-1962)

Fil: Gorza, Anabella. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina

Coherent supercontinuum generation in a silicon photonic wire in the telecommunication wavelength range

We demonstrate a fully coherent supercontinuum spectrum spanning 500 nm from a silicon-on-insulator photonic wire waveguide pumped at 1575 nm wavelength. An excellent agreement with numerical simulations is reported. The simulations also show that a high level of two-photon absorption can essentially enforce the coherence of the spectral broadening process irrespective of the pump pulse duration.SCOPUS: ar.jinfo:eu-repo/semantics/publishe