I just had a paper, "Measurement of Photon Sorting at Microwave Frequencies in a Cavity Array Metasurface" (based on some of my dissertation work, believe it or not) published in IEEE Transactions on Antennas and Propagation. It was a ridiculous review process and I owe many thanks to Isroel Mandel for his efforts getting this darn thing published. This is not an open-access paper, so let me know if you want a copy.
The basic idea in this paper is an experimental extension of previous results. In the previous paper, we demonstrated in simulation how electromagnetic fields are spectrally and spatially split into different regions of a metamaterial structure. In this paper we report how we measured this field splitting:
For the rest of the info, read the paper!
Lansey, E., et al., "Measurement of Photon Sorting at Microwave Frequencies in a Cavity Array Metasurface," in Antennas and Propagation, IEEE Transactions on, vol.63, no.10, pp.4521-4524, Oct. 2015