NEWS

First Demonstration of Imaging by Flat Lens

11/27/03

P. Parimi, W. T. Lu, P. Vodo and S. Sridhar
Nature, V. 426, P. 404 (2003)

The positive refractive index of conventional optical lenses means that they need curved surfaces to form an image, whereas a negative index of refraction allows a flat slab of a material to behave as a lens and focus electromagnetic waves to produce a real image. Here we demonstrate this unique feature of imaging by a flat lens, using the phenomenon of negative refraction in a photonic crystalline material. The key advance that enabled us to make this observation lies in the design of a photonic crystal with suitable dispersion characteristics to achieve negative refraction over a wide range of angles.

This work was selected for Breakthrough #8 of 2003 by Science and received the President's Aspiration Award.

© 2009 Northeastern University · 360 Huntington Ave., Boston, Massachusetts 02115 · 617.373.2000 · TTY 617.373.3768