Chirality

Chirality

Chiral metamaterials have been proposed as an alternative way of achieving negative refraction. This project will design, fabricate, and characterize chiral materials at GHz and THz frequencies. (C. M. Soukoulis, Th. Koschny, G. Tuttle)

Losses

Effective Permeability Graph

In current negative-index optical metamaterials, the damping is too large for real-world applications. It is presently unclear how much this can be improved by modified designs and other choices of constitutive materials. This project will work to understand and reduce losses in metamaterials. (C. M. Soukoulis, Th. Koschny)

Gain and Nonlinearity

Gain and Nonlinearity

Incorporating active gain materials into optical metamaterials has been suggested theoretically, but no concrete designs and no experimental validations have been published. This project will work to develop optical metamaterials with gain and nonlinearity. (C. M. Soukoulis, Th. Koschny, Jigang Wang)

Research Takes Frictionless Machines One Step Closer

Origin of the Casimir Force

A new discovery shows how to reverse the attractive force of two objects in close contact. The Casimir force makes tiny moving parts in nanoscale and micromechanical devices stick together and grind to a halt. This is a long-standing problem that scientists working on such devices have struggled to overcome.