3/23/2023 0 Comments Nanoscope analysis 2.0 download![]() The first laboratory optical superlens was made of a thin slab of silver material. This offers the possibility to restore the nanoscale information in the far-field and therefore a nearly perfect image can be recovered 1. Such superlenses are engineered from a slab of artificial negative-refraction medium in which the evanescent waves, instead of decaying, are enhanced across the slab. In 2000, Pendry 1 proposed a theoretical 'superlens' that produces perfect diffraction-free images. These evanescent waves carry high spatial frequency subwavelength information of an object and decay exponentially with distance. The root of the diffraction limit stems from the loss of evanescent waves in the far-field. However, because of the diffraction limit, the imaging resolution of a classical optical microscope is limited to about half of the illuminating wavelengths λ. It has revolutionized the field of life sciences and remains indispensible in many areas of scientific research. Optical microscopy is one of the most important scientific achievements in the history of mankind. ![]()
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