Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3673334
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Funding
- National Science Foundation
- Harvard Nanoscale Science and Engineering Center (NSEC) [NSF/PHY 06-46094]
- Center for Nanoscale Systems (CNS) at Harvard University
- Robert A. Welch Foundation [A-1261]
- agency for Science, Technology and Research (A*STAR), Singapore
- European Communities [PIOF-GA-2009-235860]
- Harvard Faculty of Arts and Sciences (FAS) Sciences Division Research Computing Group
- Defense Advanced Research Projects Agency (DARPA) N/MEMS, Space and Naval Warfare Systems Center Pacific (SPAWAR) [N66001-10-1-4008]
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A flat optical device that generates optical vortices with a variety of topological charges is demonstrated. This device spatially modulates light beams over a distance much smaller than the wavelength in the direction of propagation by means of an array of V-shaped plasmonic antennas with sub-wavelength separation. Optical vortices are shown to develop after a sub-wavelength propagation distance from the array, a feature that has major potential implications for integrated optics. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3673334]
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