The piece of work referred to above proposes
various compact devices comprising rectangular metal tubes with extremely narrow openings of dimensions designed in such a way that they are capable of redirecting the electromagnetic waves with levels of efficiency close to 100 %.
Lab - on - a-chip designates
devices that integrate
various biochemical functions on a fingernail - sized chip to enable quick and
compact biological analysis or medical diagnosis by processing a small volume of biological samples, such as a drop of blood.