Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm

Autor: Hao Li, Tanausú del Pino Alemán, Javier Trujillo Bueno, Franziska Zeuner

Publikováno v: The Astrophysical Journal, Vol 964, Iss 2, p 155 (2024)

We study the circular polarization of the magnetic-field-induced transition (MIT) between the 3 d ^5 ( ^6 S )4 d ^7 D _2 and 3 d ^5 ( ^6 S )4 p ^7 P _4 ° states of Cr i at 533.03 nm (wavelength in air). The fractional circular polarization V / I of

Externí odkaz: https://doaj.org/article/00d0568351364844b36f41472101bf37

Spin and wavelength multiplexed nonlinear metasurface holography

Autor: Weimin Ye, Franziska Zeuner, Xin Li, Bernhard Reineke, Shan He, Cheng-Wei Qiu, Juan Liu, Yongtian Wang, Shuang Zhang, Thomas Zentgraf

Publikováno v: Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)

Metasurfaces offer an approach for computer generated holograms with good efficiency and ease of fabrication. Here, Ye et al.report on spin and wavelength multiplexed nonlinear metasurface holography, showing construction of holographic images using

Externí odkaz: https://doaj.org/article/40cce6a0a8734252a7a11b43b048772d

Solar Disk Center Shows Scattering Polarization in the Sr i 4607 Å Line

Autor: Franziska Zeuner, Michiel van Noort, Francisco A. Iglesias, Valentin Martinez Pillet, Alex Feller, Sami K. Solanki, Kevin Reardon, Rafael Manso Sainz

Publikováno v: The Astrophysical Journal

Magnetic fields in turbulent, convective high-$\beta$ plasma naturally develop highly tangled and complex topologies---the solar photosphere being the paradigmatic example. These fields are mostly undetectable by standard diagnostic techniques with f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa4aa2d84f68ed4b73dbb6e5e1448028
https://doi.org/10.3847/2041-8213/ab86b8

Giant Nonlinear Optical Activity of Achiral Origin in Planar Metasurfaces with Quadratic and Cubic Nonlinearities

Autor: Bernhard Reineke, Thomas Zentgraf, Shumei Chen, Ventsislav K. Valev, Kok Wai Cheah, Nicolae C. Panoiu, Franziska Zeuner, Guixin Li, Martin Weismann, Shuang Zhang

Publikováno v: Advanced Materials
Chen, S, Zeuner, F, Weismann, M, Reinike, B, Li, G, Valev, V K, Cheah, K W, Panoiu, N C, Zentgraf, T & Zhang, S 2016, ' Giant nonlinear optical activity of achiral origin in planar metasurfaces with quadratic and cubic nonlinearities ', Advanced Materials, vol. 28, no. 15, pp. 2992-2999 . https://doi.org/10.1002/adma.201505640

3D chirality is shown to be unnecessary for introducing strong circular dichroism for harmonic generations. Specifically, near-unity circular dichroism for both second-harmonic generation and third-harmonic generations is demonstrated on suitably des

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4eb40e09662a41066a1285d6860c7cac

Symmetry-selective third-harmonic generation from plasmonic metacrystals

Autor: Shuang Zhang, Franziska Zeuner, Guixin Li, Kok Wai Cheah, Edwin Yue-Bun Pun, Wing Han Wong, Thomas Zentgraf, Shumei Chen

Publikováno v: Physical review letters. 113(3)

Nonlinear processes are often governed by selection rules imposed by the symmetries of the molecular configurations. The most well-known examples include the role of mirror symmetry breaking for the generation of even harmonics, and the selection rul

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::224055759e73609669e7a066e82cd8ef
https://pubmed.ncbi.nlm.nih.gov/25083645