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Nanoengineering of a negative-index binary-staircase lens for the optics regime

Appl. Phys. Lett. 92, 243122 (2008); doi:10.1063/1.2942383

Published 19 June 2008

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B. D. F. Casse,1 R. K. Banyal,1 W. T. Lu,1 Y. J. Huang,1 S. Selvarasah,2 M. Dokmeci,2 and S. Sridhar1
1Department of Physics and Electronic Materials Research Institute, Northeastern University, Boston, Massachusetts 02115, USA
2Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115, USA
We show that a binary-staircase optical element can be engineered to exhibit an effective negative index of refraction, thereby expanding the range of optical properties theoretically available for future optoelectronic devices. The mechanism for achieving a negative-index lens is based on exploiting the periodicity of the surface corrugation. By designing and nanofabricating a planoconcave binary-staircase lens in the InP/InGaAsP platform, we have experimentally demonstrated at 1.55  µm that such negative-index concave lenses can focus plane waves. The beam propagation in the lens was studied experimentally and was in excellent agreement with the three-dimensional finite-difference time-domain numerical simulations. ©2008 American Institute of Physics
History: Received 22 February 2008; accepted 17 May 2008; published 19 June 2008
Permalink: http://link.aip.org/link/?APPLAB/92/243122/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.20.Ci
    Optical constants
  • 73.20.Mf
    Collective excitations (surface/interface states)
  • 42.70.Qs
    Photonic bandgap materials
  • 41.20.Jb
    Electromagnetic wave propagation; radiowave propagation
  • 81.16.-c
    Methods of nanofabrication and processing
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (24)
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