Abstract
We study disordered arrays of metal-insulator-metal nanoantenna in order to create a diffractionless metasurface able to absorb light in the 3-5 μm spectral range. This study is conducted with angle-resolved reflectivity measurements obtained with a Fourier transform infrared spectrometer. A first design is based on a perturbation of a periodic arrangement, leading to a significant reduction of the radiative losses. Then, a random assembly of nanoantennas is built following a Poisson-disk distribution of given density, in order to obtain a nearly perfect cluttered assembly with optical properties of a homogeneous material.
| Original language | English |
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| Article number | 251108 |
| Journal | Applied Physics Letters |
| Volume | 107 |
| Issue number | 25 |
| DOIs | |
| Publication status | Published - 21 Dec 2015 |