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Nano Lett. 2012 Sep 12;12(9):4932-6. doi: 10.1021/nl302516v. Epub 2012 Aug 21.

Aberration-free ultrathin flat lenses and axicons at telecom wavelengths based on plasmonic metasurfaces.

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1
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.

Abstract

The concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength-spaced optical antennas. The lenses and axicons consist of V-shaped nanoantennas that introduce a radial distribution of phase discontinuities, thereby generating respectively spherical wavefronts and nondiffracting Bessel beams at telecom wavelengths. Simulations are also presented to show that our aberration-free designs are applicable to high-numerical aperture lenses such as flat microscope objectives.

PMID:
22894542
DOI:
10.1021/nl302516v
[Indexed for MEDLINE]
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