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10.1038/s41467-025-58205-7 http://scihub22266oqcxt.onion/10.1038/s41467-025-58205-7 C11961684!11961684!40169577     free     free     free Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\40169577.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117       Nat+Commun 2025 ; 16 (ä): ä Nephropedia Template TP {{tp|p=40169577|t=2025. Free-standing bilayer metasurfaces in the visible |pdf=|usr=}}{{40169577}} gab.com Text Free-standing bilayer metasurfaces in the visible JO: Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=40169577 #FOAvip Multi-layered meta-optics have enabled complex wavefront shaping beyond their single layer counterpart owing to the additional design variables afforded by each plane. For instance, lossless complex amplitude modulation, generalized polarization transformations, and wide field of view are key attributes that fundamentally require multi-plane wavefront matching. Nevertheless, existing embodiments of bilayer metasurfaces have relied on configurations which suffer from Fresnel reflections, low mode confinement, or undesired resonances which compromise the intended response. Here, we introduce bilayer metasurfaces made of free-standing meta-atoms working in the visible spectrum. We demonstrate their use in wavefront shaping of linearly polarized light using pure geometric phase with diffraction efficiency of 80% ? expanding previous literature on Pancharatnam-Berry phase metasurfaces which rely on circularly or elliptically polarized illumination. The fabrication relies on a two-step lithography and selective development processes which yield free standing, bilayer stacked metasurfaces, of 1200?nm total thickness. The metasurfaces comprise TiO2 nanofins with vertical sidewalls. Our work advances the nanofabrication of compound meta-optics and inspires new directions in wavefront shaping, metasurface integration, and polarization control. Twit Text FOAVip Free-standing bilayer metasurfaces in the visible ????Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=40169577 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=40169577 #FOAvip English Wikipedia <ref>{{Cite pmid|40169577}}</ref> Free-standing bilayer metasurfaces in the visible #MMPMID40169577 Dorrah AH; Park JS; Palmieri A; Capasso F Nat Commun 2025[]; 16 (ä): ä PMID40169577show ga Multi-layered meta-optics have enabled complex wavefront shaping beyond their single layer counterpart owing to the additional design variables afforded by each plane. For instance, lossless complex amplitude modulation, generalized polarization transformations, and wide field of view are key attributes that fundamentally require multi-plane wavefront matching. Nevertheless, existing embodiments of bilayer metasurfaces have relied on configurations which suffer from Fresnel reflections, low mode confinement, or undesired resonances which compromise the intended response. Here, we introduce bilayer metasurfaces made of free-standing meta-atoms working in the visible spectrum. We demonstrate their use in wavefront shaping of linearly polarized light using pure geometric phase with diffraction efficiency of 80% ? expanding previous literature on Pancharatnam-Berry phase metasurfaces which rely on circularly or elliptically polarized illumination. The fabrication relies on a two-step lithography and selective development processes which yield free standing, bilayer stacked metasurfaces, of 1200?nm total thickness. The metasurfaces comprise TiO2 nanofins with vertical sidewalls. Our work advances the nanofabrication of compound meta-optics and inspires new directions in wavefront shaping, metasurface integration, and polarization control. äFree-standing bilayer metasurfaces in the visible (epmc).pdf DeepDyve Pubget Overpricing