Abstract
We experimentally demonstrate the first midinfrared (mid-IR) resonant magnetic nanostructures exhibiting a strong magnetic response corresponding to a negative permeability. This result is an important step toward the achievement of a negative refractive index in the IR. The possibility of extending negative permeability to higher frequencies is discussed; a structure with a negative effective permeability at a near-IR resonance frequency of 230 THz is proposed.
- Received 6 April 2004
DOI:https://doi.org/10.1103/PhysRevLett.94.037402
©2005 American Physical Society