Researchers boost performance quality of perovskites

Solar cells are devices that absorb photons from sunlight and convert their energy to move electrons—enabling the production of clean energy and providing a dependable route to help combat climate change. But most solar ...

Nanocrystals emit light by efficiently 'tunneling' electrons

Using advanced fabrication techniques, engineers at the University of California San Diego have built a nanosized device out of silver crystals that can generate light by efficiently "tunneling" electrons through a tiny barrier. ...

A phonon laser operating at an exceptional point

The basic quanta of light (photon) and sound (phonon) are bosonic particles that largely obey similar rules and are in general very good analogs of one another. Physicists have explored this analogy in recent experimental ...

In physics, a famous paradox that hangs by a thread of light

Imagine a metal bar that has been heated at one end. Instead of the heat gradually spreading over its entire length, the bar eventually becomes hot again at the place where it was originally. The fact that, paradoxically, ...

Researchers devise new way to make light interact with matter

A new way of enhancing the interactions between light and matter, developed by researchers at MIT and Israel's Technion, could someday lead to more efficient solar cells that collect a wider range of light wavelengths, and ...

Capturing light in a waveguide array

Cheaper and more efficient photonic devices, such as lasers, optical fibers, and other light sources may be possible with confined light that is unaffected by imperfections in the material that confines it, according to new ...

Physicists catch light in the eye of the storm

Similar to the eye of a hurricane, physicists of research institute AMOLF, the University of Amsterdam and the University of Texas at Austin, have captured light in the eye of an optical vortex. The research will be published ...

Engineers invent a noninvasive technique to correct vision

Nearsightedness, or myopia, is an increasing problem around the world. There are now twice as many people in the US and Europe with this condition as there were 50 years ago. In East Asia, 70 to 90 percent of teenagers and ...

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