Leigha Grisby

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A novel liquid crystal-based tunable dielectric metasurface

Dielectric metasurfaces represent one of the cutting-edge research and application directions in the current optical field. They not only possess the advantage of low loss but also enable the realization of device thicknesses at subwavelength scales. Credit: Advanced Devices & Instrumentation Dielectric metasurfaces represent one of the cutting-edge research and application directions in optics. They

Brazil row over switch to e-books in Sao Paulo schools

Credit: CC0 Public Domain The Sao Paulo state government decided this week to largely replace textbooks with e-books in high schools, sparking a row in Brazil, where education experts and publishers warned the move could have negative consequences. Starting next year, students aged 14 and over at 5,300 schools across Brazil’s most populous state will

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