Spherical hyperlens for two-dimensional sub-diffractional imaging at visible frequencies

Junsuk Rho, Ziliang Ye, Yi Xiong, Xiaobo Yin, Zhaowei Liu, Hyeunseok Choi, Guy Bartal and Xiang Zhang ()
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Junsuk Rho: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California
Ziliang Ye: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California
Yi Xiong: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California
Xiaobo Yin: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California
Zhaowei Liu: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California
Hyeunseok Choi: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California
Guy Bartal: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California
Xiang Zhang: NSF Nano-scale Science and Engineering Center, 3112 Etcheverry Hall, University of California

Nature Communications, 2010, vol. 1, issue 1, 1-5

Abstract: Abstract Hyperlenses have generated much interest recently, not only because of their intriguing physics but also for their ability to achieve sub-diffraction imaging in the far field in real time. All previous efforts have been limited to sub-wavelength confinement in one dimension only and at ultraviolet frequencies, hindering the use of hyperlenses in practical applications. Here, we report the first experimental demonstration of far-field imaging at a visible wavelength, with resolution beyond the diffraction limit in two lateral dimensions. The spherical hyperlens is designed with flat hyperbolic dispersion that supports wave propagation with very large spatial frequency and yet same phase speed. This allows us to resolve features down to 160 nm, much smaller than the diffraction limit at visible wavelengths, that is, 410 nm. The hyperlens can be integrated into conventional microscopes, expanding their capabilities beyond the diffraction limit and opening a new realm in real-time nanoscopic optical imaging.

Date: 2010
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DOI: 10.1038/ncomms1148

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