Abstract
We study optical modulated transmission in semiconductor hole arrays using terahertz time-domain measurements in combination with the optical pump-terahertz probe technique. When the density of photoexcited carriers is varied, we observe an evanescent decay profile for the propagation of surface plasmon polaritons, whereas steady behavior is exhibited for transmission attributed to the localized resonance in the holes. We also demonstrate an optically controlled transition of the transmission mechanism, attributed to the change from a dielectric structure to a plasmonic material.
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