The nanostructures from Katja Höflich's HZB team are shaped like corkscrews and made of silver. Mathematically, such a nano antenna can be regarded as an one-dimensional line that forms a helix, ...

DR. SCOTT'S treatise is a welcome addition to the many excellent text-books on analytical geometry which have been published during the last few years. But while most of the text-books in use at the ...