Waveform-selective metasurfaces with free-space wave pulses at the same frequency

Waveform-selective metasurfaces were recently reported to enable us to distinguish different surface waves even at the same frequency in accordance with their waveforms or pulse widths. In this study, we demonstrate that such new characteristics are applicable to controlling not only surface waves but also free-space waves including ones normal to metasurfaces. Both simulation and measurement results show selective absorption or transmission for specific pulses at the same frequency. Thus, the waveform selectivity is expected to create a wider range of new applications, for instance, waveform-selective antennas and wireless communications. (C) 2015 AIP Publishing LLC.