Science, Space and Technology News 2023
Exploring the interaction of light beams in a stadium-shaped arena provides scientists with a deeper understanding of its complex behavior.
Physicist Andrea Alù draws a parallel between the behavior of light in chaotic systems and a game of billiards, where slight variations in the cue ball’s launch result in different ball trajectories on the table. “In a cavity that supports chaotic patterns of light, any single frequency injected into the cavity can excite thousands of light patterns, which is conventionally thought to doom the chances of controlling the optical response,” Jaing said. “We have demonstrated that it is possible to control this chaotic behavior.”To address the challenge, the team designed a large stadium-shaped cavity with an open top and two channels on opposing sides that direct light into the cavity.
“We found at certain frequencies our system can support two independent, overlapping RSMs, which cause all of the light to enter the stadium cavity without reflections back to our channel ports, thus enabling its control,” said Yin. “Our demonstration deals with optical signals within the bandwidth of optical fibers that we use in our daily life, so this finding paves a new way for better storage, routing, and control of light signals in complex optical platforms.
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