Generation of short contrapropagating pulses of second harmonic on frequency double-domain positive/negative index metamaterials

Extraordinary properties of short-pulse second harmonic generation in a frequency double-domain positive/negative index metamaterial are investigated and shown to appear in striking contrasts with those of their counterparts in ordinary materials. A metamaterial made of carbon nanotubes is proposed which supports coexistence of ordinary fundamental and backward second harmonic electromagnetic waves. Unparallel properties of frequency-doubling nonlinear-optical metamirror are predicted.