superlensing tagged posts

Superlensing Without a Super Lens: Physicists Boost Microscopes beyond limits

Scientists used a new superlens technique to view an object just 0.15 millimetres wide using a virtual post-observation technique. The object ‘THZ’ (representing the ‘terahertz’ frequency of light used) is displayed with initial optical measurement (top right); after normal lensing (bottom left); and after superlensing (bottom right).

Ever since Antonie van Leeuwenhoek discovered the world of bacteria through a microscope in the late seventeenth century, humans have tried to look deeper into the world of the infinitesimally small.

There are, however, physical limits to how closely we can examine an object using traditional optical methods. This is known as the diffraction limit and is determined by the fact that light manifests as a wave...

Read More

Photonic Crystals reveal their Internal characteristics with new method

Photonic crystals reveal their internal characteristics with new method

This image shows theoretical (right) and experimental (left) iso-frequency contours of a photonic crystal slabs superimposed on each other. Credit: Massachusetts Institute of Technology

A new technique developed by MIT researchers reveals the inner details of photonic crystals, synthetic materials whose exotic optical properties are the subject of widespread research. Photonic crystals are generally made by drilling millions of closely spaced, minuscule holes in a slab of transparent material, using variations of microchip-fabrication methods...

Read More