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Lithium niobate (LiNbO) has shown great potential for applications in nonlinear metasurfaces, thanks to its large second-order nonlinear coefficients and high integration capabilities. Optical resonances play a crucial role in further enhancing the nonlinear optical responses of LiNbO metasurfaces (LNMS). In this study, both numerically and experimentally, we designed and fabricated a metasurface structure that supports toroidal dipole (TD) resonance to enhance second-harmonic generation (SHG).
View Article and Find Full Text PDFThis publisher's note contains a correction to Opt. Lett.49, 4863 (2024)10.
View Article and Find Full Text PDFIn this study, TaO was obliquely deposited on a polymer grating, resulting in a nanostructured thin film (NTF) with pronounced anisotropic optical properties. We measured and compared the principal indices and principal axes orientations of NTFs grown on both a grating and a smooth glass substrate. By adjusting the deposition angle, we observed a significant variation in the columnar angle and principal indices of the NTF on the grating, compared to the NTF on a smooth surface.
View Article and Find Full Text PDFAdvanced MASnI and PTAA-Integrated ZnO Perovskite Composite: Optimizing Stability and Charge Dynamics for Next-Gen Photobatteries.
ACS Appl Mater Interfaces
January 2025
Department of Physics, Riphah International University, Campus Lahore, Lahore 54000, Pakistan.
To advance off-grid energy solutions, developing flexible photobatteries capable of direct light charging is essential. This study presents an innovative photobattery architecture that incorporates zinc oxide (ZnO) as an electron-transporting and hole-blocking layer, combined with a hybrid methylammonium tin iodide composite with poly-triarylamine (MASnI/PTAA) for light absorption and hole transport. PTAA facilitates efficient hole transport to the anode, thereby enhancing charge separation and reducing recombination losses.
View Article and Find Full Text PDFSilicon Nanotube Anode on Copper Foils for Li-Ion Batteries.
ACS Appl Mater Interfaces
January 2025
Department of Chemical Engineering and Conn Center for Renewable Energy ResearchUniversity of Louisville, 132 Eastern Parkway, Louisville, Kentucky 40292, United States.
We report a silicon anode for lithium-ion batteries consisting of a layer of 100% nanotubes directly bonded to copper foil. The process involved silicon deposition on a sacrificial zinc oxide nanorod film and removal of zinc oxide to produce a nanotube film directly on thin copper foils. The thickness of resulting films ranged from 9 to 20 μm with Si nanotubes having diameters of 200-400 nm and lengths of 2-10 μm.
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