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Combined Techniques Image Movement of Confined Light

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A combined interferometric and microscopy technique has revealed the strange ways in which light moves when confined inside hyperbolic materials. Researchers at CIC nanoGUNE in the Basque Country and the Institute of Photonic Sciences (ICFO) in Catalunya have observed, for the first time, ultraslow pulse propagation and backward propagating waves in a subwavelength-scale (135-nm) slab of boron nitride, a natural material that exhibits hyperbolic optical properties at mid-infrared frequencies. The work lays the foundations for studying the precise manner in which light travels...Read full article

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