Abstract
We demonstrate wide-angle, broadband, and efficient reflection holography by utilizing coupled dipole-patch nanoantenna cells to impose an arbitrary phase profile on the reflected light. High-fidelity images were projected at angles of 45 and 20° with respect to the impinging light with efficiencies ranging between 40-50% over an optical bandwidth exceeding 180 nm. Excellent agreement with the theoretical predictions was found at a wide spectral range. The demonstration of such reflectarrays opens new avenues toward expanding the limits of large-angle holography.
Original language | English |
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Pages (from-to) | 2485-2490 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 14 |
Issue number | 5 |
DOIs | |
State | Published - 14 May 2014 |
Keywords
- Nanoantenna
- coupled patch-dipole antennas
- holography
- localized surface plasmon
- metamaterials