When material goes quantum, electrons slow down and form a crystal

The shifting, scintillating pattern you can see when you stack two slightly misaligned window screens is called moiré. A similar interference effect occurs when scientists stack two-dimensional crystals with mismatched atomic ...

Shining light on the separation of rare earth metals

Inside smartphones and computer displays are metals known as the rare earths. Mining and purifying these metals involves waste- and energy-intense processes. Better processes are needed. Previous work has shown that specific ...

Seeing the color of entangled photons in molecular systems

Spectroscopy is the study of how matter absorbs and emits light and other radiation. It allows scientists to study the structure of atoms and molecules, including the energy levels of their electrons. Classical optical spectroscopy ...

Getting light in shape with metamaterials

Converting light from one wavelength (or "color") to a shorter wavelength, a process needed for efficient communication and advanced manufacturing, is typically inefficient. To tackle that inefficiency, a team built a specialized, ...

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