Cathodoluminescence Used to Probe Metamaterials

True-colour cathodoluminescence image taken with the Cameca SX100. Fluorite (blue-violet) is shown associated with calcite (yellow-orange) in a carbonatite from India. Credit: Natural History Museum UK

The phenomenon of cathodoluminescence gave geologists an easy way to identify quartz and other minerals in rock samples. Cathodoluminescence allows a piece of quartz to glow icy blue when put under an electron scanning microscope. Now, scientists have used this phenomenon to probe into nanostructures.

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Duke University Creates “Perfect” Microwave Cloak

duke-unversity-microwave-cloak

Scientists have been able to successfully cloak an object, rendering a centimeter-scale cylinder invisible to microwaves. Many different invisibility cloaks have been demonstrated, but all of those reflect some of the incidental light, making the illusion incomplete. This is the first to cloak an object perfectly.

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Scientists Change the Color of Gold

nano-embossed-gold

Scientists in Southampton, UK, are now able to change the color of gold, which could have applications in jewelry-making and security features.

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