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Science. 2012 Aug 3;337(6094):549-52. doi: 10.1126/science.1220600.

Transformation optics and subwavelength control of light.

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The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK.


Our intuitive understanding of light has its foundation in the ray approximation and is intimately connected with our vision. As far as our eyes are concerned, light behaves like a stream of particles. We look inside the wavelength and study the properties of plasmonic structures with dimensions of just a few nanometers, where at a tenth or even a hundredth of the wavelength of visible light the ray picture fails. We review the concept of transformation optics that manipulates electric and magnetic field lines, rather than rays; can provide an equally intuitive understanding of subwavelength phenomena; and at the same time can be an exact description at the level of Maxwell's equations.


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