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Abstract

The precise manipulation of a propagating wave using phase control is a fundamental building block of optical systems. The wavefront of a light beam propagating across an interface can be modified arbitrarily by introducing abrupt phase changes. We experimentally demonstrated unparalleled wavefront control in a broadband optical wavelength range from 1.0 to 1.9 micrometers. This is accomplished by using an extremely thin plasmonic layer (~λ/50) consisting of an optical nanoantenna array that provides subwavelength phase manipulation on light propagating across the interface. Anomalous light-bending phenomena, including negative angles of refraction and reflection, are observed in the operational wavelength range.

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References and Notes

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Science
Volume 335 | Issue 6067
27 January 2012

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Submission history

Received: 30 September 2011
Accepted: 13 December 2011
Published in print: 27 January 2012

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Acknowledgments

This work was supported by Multidisciplinary University Research Initiative grants (Air Force Office of Scientific Research, FA9550-10-1-0264; Office of Naval Research, N00014-10-1-0942), Air Force Research Lab–Materials and Manufacturing Directorate, and NSF Division of Materials Research (1120923).

Authors

Affiliations

Xingjie Ni
School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
Naresh K. Emani
School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
Alexander V. Kildishev
School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
Alexandra Boltasseva
School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
Vladimir M. Shalaev* [email protected]
School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.

Notes

*
To whom correspondence should be addressed. E-mail: [email protected]

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