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<i>Planck</i> 2018 results

We present cosmological parameter results from the final full-mission Planck measurements of the cosmic microwave background (CMB) anisotropies, combining information from the t...

2020 Astronomy and Astrophysics 12547 citations

Negative 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 materi...

2000 Physical Review Letters 11898 citations