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Independent phase and amplitude control of second harmonic generation from electrically tunable nonlinear polaritonic metasurfaces
No full textElectrical control of second harmonic generation from intersubband polaritonic metasurfaces
No full textWe report electrically tunable nonlinear optical metasurfaces for Second Harmonic Generation (SHG) based on coupling of intersubband transitions with plasmonic nanocavity. In the structure, conversion efficiency, spectral bandwidth, and local nonlinear phase of SHG can be controlled by the nonlinear response of the constituent meta-atoms. Experimentally, we demonstrate over 2900% of SHG intensity modulation depth, SHG beam diffraction, and SHG beam steering by applying electrical bias voltages. In addition, we propose a new meta-atom structure with full 2?? phase tunability, which can be used to construct electrically tunable nonlinear flat optics
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No full textTOUCH PANEL AND DISPLAY DEVICE HAVING THE SAME
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Alkali activation of paper industry lime mud and assessment of its application in cementless binder
No full textThis study revealed that the application of lime mud (LM) aids in construction materials that is sustainably economical, energy-efficient, and environmentally beneficial. A 2 M NaOH solution composed of 70% LM and 30% NaOH dissolved LM, and formed more reactive calcium hydroxide and carbonates, like thermonatrite and Pirssonite. It was confirmed with XRD, FTIR, and TGA of activated LM. Activated LM and untreated LM were used to prepare blends with ground granulated blast furnace slag (GGBFS) and silica fume. Activated LM was found to be compelling in the improvement of the reactivity of binder paste for all substitution extents and resulted in superior compressive quality in comparison to binder with untreated LM. Mineralogical analysis and an isothermal calorimeter showed the development of more hydration products and heat of hydration in binder pastes with activated LM. The leaching test and life cycle analysis also highlight the effectiveness of the proposed method