B. D. F. Casse, W. T. Lu, Y. J. Huang, E. Gultepe, L. Menon, and S. Sridhar. Super-resolution imaging using a three-dimensional metamaterials nanolens. Appl. Phys. Lett. 96, 023114 (2010), DOI:10.1063/1.3291677 [...]
We have manufactured a three-dimensional (3D) metamaterials nanolens, consisting of bulk nanowires embedded in a dielectric matrix, which boasts significant advantages such as low-loss, broad bandwidth operation, and support for both propagating and evanescent waves required for full imaging, over currently available metamaterials prototypes. Additionally, It has a figure of merit which is 4 times higher than the best fabricated metallic-based metamaterial.
“This is probably the best superlens realized so far—In contrast to a grating far-field superlens, it needs only a single measurement to obtain a very large bandwidth in Fourier space to reconstruct superresolution details of an object. And, unlike the hyperlens, the metamaterial nanolens has theoretically no limitations on the imaging area.” says Sri Sridhar.
With this 3D nanolens, we have demonstrated superresolution imaging over a record distance of 6 times the wavelength (λ), in the far-field, with a resolution of at least λ/4. The superior optical properties of the lens and the ability to manufacture the bulk nanowires in large scale, offers the potential for numerous applications in biomedical imaging, transformation optics, optical storage devices and nanolithography.
The press release can be found here:
Northeastern University physicists develop nanolens that improves imaging of nanoscale objects
http://www.nanotech-now.com/news.cgi?story_id=36280
This work is profiled in several online journals.
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