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Transformation Optics in Silicon Photonics

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The Luneburg lens is a gradient index lens that focuses light from all incident directions, thus being free from aberrations that affect conventional lenses. Like the Maxwell fish-eye lens or the Eaton lens, the Luneburg lens can be described via non-Euclidean transformation, where light in a medium is experiencing a curved spatial geometry. The Luneburg lens focuses light on the edge of the lens in the same direction of the incident light. The position of the focus thus indicates the direction of light corresponding to a Fourier transform in terms of light waves. Luneburg lenses are commonly used in microwave technology and have recently been… Read More »Transformation Optics in Silicon Photonics