In a recent breakthrough, scientists have discovered a new way to manipulate light at the atomic level. Through the use of coherent phonons, they have demonstrated that they can induce optical birefringence in the gigahertz range. This means that light can be made to travel at different velocities, depending on its polarization, in a single material. The ability to control and manipulate light at the atomic level has the potential to revolutionize optical technology, leading to new and improved applications in telecommunications, data storage, and more.

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source: Phys.org