  We present the first use of a waveform-dependent absorbing metasurface for
high-power pulsed surface currents. The new type of nonlinear metasurface,
composed of circuit elements including diodes, is capable of storing high power
pulse energy to dissipate it between pulses, while allowing propagation of
small signals. Interestingly, the absorbing performance varies for high power
pulses but not for high power continuous waves (CWs), since the capacitors used
are fully charged up. Thus, the waveform dependence enables us to distinguish
various signal types (i.e. CW or pulse) even at the same frequency, which
potentially creates new kinds of microwave technologies and applications.
