Tomer's recent publication, Widely Tunable Infrared Antennas Using Free Carrier Refraction, was just published in Nano Letters. In this work we fabricate spherical Si and Ge nanoparticles and measure their associated infrared Mie resonances. We show that single nanoparticles can exhibit wavelength shifts arising from continuous doping-dependent tuning of the permittivity between dielectric (epsilon ~ 14) and metallic (epsilon ~ -20) regimes.

Our work on "Reconfigurable Semiconductor Phased Array Metasurfaces" was recently published in ACS Photonics. The article was chosen as an "ACS Editors' Selection". The American Chemical Society selects one paper a day across all their journals to highlight as being of particular interest to a broader audience. Given that they publish over 40,000 articles a year, this is quite an honor!

http://pubs.acs.org/doi/abs/10.1021/acsphotonics.5b00132

Thanks to the University of California for our Multicampus Research Program and Initiative grant on Quantum Tunable Materials