Researchers show it’s possible to make photons that cross paths interact, paving the way for technology breakthroughs. A research team at the Advanced Science Research Center at the CUNY Graduate Center (CUNY ASRC) has demonstrated that it is possible to manipulate photons so that they can collid
with unique properties that emerge from abrupt time variations of their electromagnetic properties. These variations allow us to manipulate wave propagation in ways not seen in nature,” explained Alù. “This newest work shows that we can use abrupt temporal changes in tailored metamaterials – known as time interfaces – to make waves collide as if they were massive objects. We were also able to control whether the waves exchanged, gained, or lost energy during these collisions.
Although photons would be expected to go through each other without any interaction, by triggering a time interface the scientists were able to demonstrate strongThe research team’s work was inspired by speculation about whether it would be possible to erase an unwanted mechanical wave, such as a tsunami or a seismic wave, by throwing another similar wave against it to counter it.
The team’s efforts in developing methods to dictate how propagating electromagnetic waves interact and shape each other could bring benefits to wireless communications, imaging, computing, and energy harvesting technologies, among other advancements. Reference: “Broadband coherent wave control through photonic collisions at time interfaces” by Emanuele Galiffi, Gengyu Xu, Shixiong Yin, Hady Moussa, Younes Ra’di and Andrea Alù, 14 August 2023,
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