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    Université de Fribourg

    Fluctuations of the electromagnetic local density of states as a probe for structural phase switching

    Sousa, N. de ; Sáenz, Juan José ; Scheffold, Frank ; García-Martín, A. ; Froufe-Pérez, Luis S.

    In: Physical Review A, 2016, vol. 94, no. 4, p. 043832

    We study the statistics of the fluorescence decay rates for single quantum emitters embedded in a scattering medium undergoing a phase transition. Under certain circumstances, the structural properties of the scattering medium explore a regime in which the system dynamically switches between two different phases. While in that regime the light-scattering properties of both phases are hardly...

    Université de Fribourg

    Magneto-Optical Activity in High Index Dielectric Nanoantennas

    Sousa, N. de ; Froufe-Pérez, Luis S. ; Sáenz, Juan José ; García-Martín, A.

    In: Scientific Reports, 2016, vol. 6, p. 30803

    The magneto-optical activity, namely the polarization conversion capabilities of high- index, non-absorbing, core-shell dielectric nanospheres is theoretically analyzed. We show that, in analogy with their plasmonic counterparts, the polarization conversion in resonant dielectric particles is linked to the amount of electromagnetic field probing the magneto-optical material in the system....

    Université de Fribourg

    Self-diffusion and structural properties of confined fluids in dynamic coexistence

    Sousa de, N. ; Sáenz, Juan José ; Scheffold, Frank ; García-Martín, A. ; Froufe-Pérez, Luis S.

    In: Journal of Physics: Condensed Matter, 2016, vol. 28, no. 13, p. 135101

    Self-diffusion and radial distribution functions are studied in a strongly confined Lennard-Jones fluid. Surprisingly, in the solid–liquid phase transition region, where the system exhibits dynamic coexistence, the self-diffusion constants are shown to present up to three-fold variations from solid to liquid phases at fixed temperature, while the radial distribution function corresponding...