Journal
NANO LETTERS
Volume 12, Issue 9, Pages 4932-4936Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl302516v
Keywords
Metasurfaces; phase-discontinuities; lens; axicon; plasmonics; aberration-free
Categories
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]
- European Communities Seventh Framework Programme [PIOF-GA-2009-235860]
- National Science Foundation through a Graduate Research Fellowship
- Defense Advanced Research Projects Agency (DARPA)
- Micro-Electro-Mechanical Systems (N/MEMS) Science and Technology (S&T) Fundamentals program [N66001-10-1-4008]
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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 nano-antennas 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.
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