Broadband enhancement of the magneto-optical activity of hybrid Au loaded Bi:YIG

We unravel the underlying near-field mechanism of the enhancement of the magneto-optical activity of bismuth-substituted yttrium iron garnet films (Bi:YIG) loaded with gold nanoparticles. The experimental results show that the embedded gold nanoparticles lead to a broadband enhancement of the magneto-optical activity with respect to the activity of the bare Bi:YIG films. Full vectorial near- and far-field simulations demonstrate that this broadband enhancement is the result of a magneto-optically enabled cross-talking of orthogonal localized plasmon resonances. Our results pave the way to the on-demand design of the magneto-optical properties of hybrid magneto-plasmonic circuitry.Comment: 6 Pages, 3 Figure

Anaplasma phagocytophilum Infection in Ixodes ricinus, Bavaria, Germany

Anaplasma phagocytophilum DNA was detected by real-time PCR, which targeted the msp2 gene, in 2.9% of questing Ixodes ricinus ticks (adults and nymphs; n = 2,862), collected systematically from selected locations in Bavaria, Germany, in 2006. Prevalence was significantly higher in urban public parks in Munich than in natural forests

Influence of two different interfaces for noninvasive ventilation compared to invasive ventilation on the mechanical properties and performance of a respiratory system - A lung model study

Background: Noninvasive ventilation (NIV) is increasingly used in intensive care medicine, but only little information is available bow different NIV interfaces affect the performance of a ventilatory system. Therefore, we compared delay times, pressure time products (PTPs), and wasted efforts during inspiration among patients receiving invasive ventilation and NIV with a belmet (NIV-H) or a face mask (NIV-FM)

Plasmonic wavelength-dependent optical switch

Kilbane D, Prinz E, Eul T, et al. Plasmonic wavelength-dependent optical switch. Optics Express. 2023;31(6):9579-9590.We design and experimentally demonstrate an optical switch based on the interference of plasmonic modes in whispering gallery mode (WGM) antennas. Simultaneous excitation of even and odd WGM modes, enabled by a small symmetry breaking via non-normal illumination, allows switching the plasmonic near field between opposite sides of the antenna, depending on the excitation wavelength used in a wavelength range of 60 nm centered around 790 nm. This proposed switching mechanism is experimentally demonstrated by combining photoemission electron microscopy (PEEM) with a tunable wavelength femtosecond laser source in the visible and infrared

Direct imaging of photonic band-edge states in golden Vogel spirals using photoemission electron microscopy

Aeschlimann M, Brixner T, Fenner F, et al. Direct imaging of photonic band-edge states in golden Vogel spirals using photoemission electron microscopy. Journal of the Optical Society of America B: Optical Physics . 2023;40(3):B19-B27.Golden Vogel spirals, as deterministic aperiodic structures, support isotropic photonic band gaps and have inter-esting applications. Localized modes, such as band-edge states, are essential for tailored light-matter interaction. Here we report imaging of such modes using photoemission electron microscopy (PEEM). Tunable ultrashort light pulses excite them in golden Vogel spirals that were fabricated by focused-ion-beam (FIB) milling of an a-Si:H layer. The local near-field leads to electron emission, which is detected spatially resolved. The demonstration of FIB-textured a-Si:H as photonic material and the ability of mode imaging by PEEM offers means to spatiotemporally resolve mode dynamics and to perform nanospectroscopy. (c) 2023 Optica Publishing Grou