Complementary chiral metamaterials with giant optical activity and negative refractive index

Negative refractive index in chiral metamaterials.

We experimentally demonstrate a chiral metamaterial exhibiting negative refractive index at terahertz frequencies. The presence of strong chirality in the terahertz metamaterial lifts the degeneracy for the two circularly polarized waves and allows for the achievement of negative refractive index without requiring simultaneously negative permittivity and negative permeability. The realization o...

Negative refractive index metamaterials

a negative index of refraction over a band of microwave frequencies1. This demonstration of a previously unexploited electromagnetic (EM) property proved the importance of engineered materials and has resulted in an extraordinary amount of continued development by scientists working in optics, electromagnetism, physics, engineering, and materials science. Experimental results revealing new phen...

Metamaterials and negative refractive index.

Recently, artificially constructed metamaterials have become of considerable interest, because these materials can exhibit electromagnetic characteristics unlike those of any conventional materials. Artificial magnetism and negative refractive index are two specific types of behavior that have been demonstrated over the past few years, illustrating the new physics and new applications possible ...

Terahertz chiral metamaterials with giant and dynamically tunable optical activity

Jiangfeng Zhou,1,* Dibakar Roy Chowdhury,1 Rongkuo Zhao,2 Abul K. Azad,1 Hou-Tong Chen,1,† Costas M. Soukoulis,2 Antoinette J. Taylor,1 and John F. O’Hara1,‡ 1Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 2Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, ...

Resonant Negative Refractive Index Metamaterials