Fullerene: A Ball That Shoots Single Photons ⚡ экспресс
Single-photon sources are fundamentally important for quantum computing, secure communication, and sensing. This work demonstrates that commercially available C60 fullerene molecules, dispersed in polystyrene, act as reliable single-photon emitters at room temperature. These sources provide on-demand single-photon emission with short fluorescence lifetimes, resulting in high emission rates. The method uses widely available, low-cost materials and is simple to implement, overcoming limitations of existing sources in stability, integration, and cost. The results pave the way for practical, cost-effective, and scalable quantum photonic technologies.
Ordinary light is a stream of billions of particles flying chaotically. But for quantum communication, you need light that comes one by one, like water from an IV drip. Scientists found a simple way: they took fullerene — carbon balls shaped like a soccer ball — and mixed them with ordinary polystyrene (the stuff disposable cups are made of). The result is a film that, when illuminated, emits strictly single photons.
The secret lies in fluorescence — the ability of molecules to glow after absorbing energy. But fullerene in plastic behaves like a perfect faucet: every time it gets a dose of light, it gives back exactly one photon. No more, no less. Such a source doesn’t need refrigerators or complex lasers — it works at room temperature.
Sources like this are the key to quantum cryptography (absolutely secure data transmission) and quantum computers. Fullerene is cheap, stable, and easily integrated into optical fiber — the glass threads that carry the internet. Soon, a piece of plastic with carbon balls could protect your data from any hack. And to think, fullerene was first spotted in ordinary candle soot — now it’s making quantum communication everyday.
🎯 Fullerene C60 was predicted long before synthesis and even occurs in nature — for example, in candle soot.