Scientists have developed a new photonic chip that can generate entirely new colors of light from a single laser input—solving a long-standing challenge in nonlinear optics. Unlike traditional optics, where light only changes direction or intensity, this chip uses engineered nonlinear interactions to create new light frequencies that didn’t exist in the original beam. The breakthrough lies in its ability to reliably produce multiple new colors without complex tuning, making it far more practical than earlier designs. This advancement could significantly impact technologies like quantum computing, precision timekeeping, and advanced sensing by enabling compact, energy-efficient light sources directly on chips.
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