منابع مشابه
Imperfect perfect lens.
We have quantitatively established a fundamental limitation on the ultimate spatial resolution of the perfect lens (thin metal slab) in the near field. This limitation stems from the spatial dispersion of the dielectric response of the Fermi liquid of electrons with Coulomb interaction in the metal. We discuss possible applications in nanoimaging, nanophotolithography, and nanospectroscopy.
متن کامل7 Descartes ’ Perfect Lens
We give a new, elementary, purely analytical development of Descartes’ theorem that a smooth connected surface is a perfect focusing lens if and only if it is a connected subset of the ovoid obtained by revolving a cartesian oval around its axis of symmetry.
متن کاملDoes negative refraction make a perfect lens?
Article history: Received 22 August 2008 Accepted 1 September 2008 Communicated by V.M. Agranovich PACS: 78.20.Ci 42.30.Wb 73.20.Mf
متن کاملNegative refraction makes a perfect lens
With a conventional lens sharpness of the image is always limited by the wavelength of light. An unconventional alternative to a lens, a slab of negative refractive index material, has the power to focus all Fourier components of a 2D image, even those that do not propagate in a radiative manner. Such "superlenses" can be realized in the microwave band with current technology. Our simulations s...
متن کاملOdd perfect numbers of a special form∗†
We shall show that there is a effectively computable upper bound of odd perfect numbers whose Euler factors are powers of fixed exponent.
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ژورنال
عنوان ژورنال: Science
سال: 2017
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aao1456