Crystals that absorb light backward ⚡ экспресс
In the quantum world, many particles can emit light perfectly in sync—this is superradiance. Scientists reversed it: instead of emission, they got ultrafast absorption, like a reflected flash. The effect appears in nanocrystals at room temperature and leads to super-efficient devices. Is it a quantum echo or a step toward new technologies?
Superfluorescence is a crystal’s synchronized exhale of light. Researchers just witnessed its mirror image: superabsorption, a coordinated inhale. They zapped cheap perovskite nanocrystals with laser pulses (spectroscopy) and saw a time-reversed absorption burst.
The trick? Fleeting internal distortions called polarons, which act as pacemakers to synchronize light-sensitive units. The event happens in a tenth of a trillionth of a second. No deep freeze needed: polarons impose order even at room temperature, unlike similar phenomena that require near-absolute-zero cooling. By adjusting the crystal size and adding carbon-based components, scientists tuned the effect to near-perfection, monitoring it with light measurement—essentially lowering entropy (disorder) against thermal chaos.
This paves the way for solar panels that drink in every photon, or detectors sensitive to single light particles.
🎯 The cooperative absorption happens 10 trillion times faster than the blink of an eye.
🎬 In science fiction, perfect light absorbers enable cloaking devices or endless energy; this discovery might bring that fantasy closer to reality.