Researchers have developed a new technique to detect photons — elementary particles that span from visible light to radio frequencies and are instrumental in carrying cellular communication. The advancement could lead to more precise and efficient technologies in various fields, from improving medical imaging and communication systems to enhancing scientific research and even potentially bolstering security measures. Photon detection has typically relied on change/modulation of voltage or current amplitude. But Chanda has developed a way to detect photons by modulating the frequency of an oscillating circuit, paving the path for ultra-sensitive photon detection. Chanda’s method uses a special, phase-change material (PCM) that changes its form when light touches it, making an electrical rhythm that stays steady, or a stable electrical circuit oscillation.