Jeff Lundeen, an Associate Professor in the Department of Physics at uOttawa, along with the Boyd Research Group, has made a groundbreaking discovery that challenges our understanding of how light behaves. For the first time, researchers have observed light interacting with itself in a way previously thought impossible.

Typically, photons — particles of light — pass through one another without interference. However, this experiment revealed a remarkable phenomenon: a laser beam casting a shadow that mimics the behavior of shadows created by solid objects.

“We’ve shown that under certain conditions, light can actually block other light, creating a shadow,” explains Professor Lundeen. “This opens up exciting new possibilities for controlling and manipulating light in ways we never thought possible before.”

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