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To control backscattering and reduce energy loss during optical data transmission, researchers from the University of Illinois at Urbana-Champaign exploited the interaction between light and sound waves. They were able to achieve robust light propagation in spite of scatterers and defects by dynamically suppressing backscattering using time-reversal symmetry breaking.
The team sent lightwaves into a microresonator made from silica. As the light inside the resonator traveled along a circular path, it encountered defects in the silica repeatedly, which amplified the backscattering effect. The researchers used a second laser beam to engage the light-sound interaction in the backward direction only, blocking the possibility of light…READ MORE