alexa Optical near-field microscopy of light focusing through a photonic crystal flat lens.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Fabre N, Lalouat L, Cluzel B, Mlique X, Lippens D,

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Abstract We report here the direct observation by using a scanning near-field microscopy technique of the light focusing through a photonic crystal flat lens designed and fabricated to operate at optical frequencies. The lens is fabricated using a III-V semiconductor slab, and we directly visualize the propagation of the electromagnetic waves by using a scanning near-field optical microscope. We directly evidence spatially, as well as spectrally, the focusing operating regime of the lens. At last, in light of the experimental scanning near-field optical microscope pictures, we discuss the lens ability to focus light at a subwavelength scale. This article was published in Phys Rev Lett and referenced in Journal of Nanomedicine & Nanotechnology

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