Eric Tucker - Near- and far-field spectroscopic imaging investigation of resonant square-loop infrared metasurfaces

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      Publication Details (including relevant citation   information):

      D' Archangel, Jeffrey , Tucker, Eric , Kinzel, Ed , Muller, Eric   A. , Bechtel, Hans A. , Martin, Michael C. , Raschke, Markus B. ,   Boreman, Glenn , Opt. Express, 2013,   21 (14), pp 17150-17160


      Optical metamaterials have unique properties which result from   geometric confinement of the optical conductivity. We developed a   series of infrared metasurfaces based on an array of metallic   square loop antennas. The far-field absorption spectrum can be   designed with resonances across the infrared by scaling the   geometric dimensions. We measure the amplitude and phase of the   resonant mode as standing wave patterns within the square loops   using scattering-scanning near-field optical microscopy (s-SNOM).   Further, using a broad-band synchrotron-based FTIR microscope and   s-SNOM at the Advanced Light Source, we are able to correlate   far-field spectra to near-field modes of the metasurface as the   resonance is tuned between samples. The results highlight the   importance of multi-modal imaging for the design and   characterization of optical metamaterials.

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