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We demonstrate an ultra-broadband all-optical terahertz modulator based on a semiconductor-integrated hybrid metamaterial. Under photoexcitation using near-infrared laser pulses, the semiconductor regions become highly conducting, causing a transition of the metamaterial from an array of dipole patch grid to a metal wire grating. This transition exhibits dramatically different transmission properties...
In this paper, we present a review of experimental studies of terahertz plasmonic transmission properties through subwavelength holes patterned in conducting films. The frequency-dependent transmission spectrum reveals resonant behavior with an anomalously high peak transmission which is mediated by the excitation of surface plasmon polaritons. We show how terahertz time-domain spectroscopy has been...
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