In Brief: Ultrafast transparency in a plasmonic nanorod

The ultrafast switching behavior is due to strong coupling between the nanorod plasmons, which are collective free-electron responses of metals that are driven by the incident light.

The key discovery is that the closely spaced nanorod material exhibits nonlocality of the optical response, which has an unusually strong nonlinear dependence on incident light intensity.

These materials belong to a new class of “metamaterials” – those with optical properties and responses that do not occur naturally.

Electromagnetic modeling by Univversity of Massachusetts collaborators confirms the nonlocal response of the plasmonic metamaterial.

More information: G. A. Wurtz et al., Nature Nanotechnology, in press (2011).

Provided by Argonne National Laboratory