Abstract

A major challenge in the development of surface plasmon optics or plasmonics is the active control of the propagation of surface plasmon polaritons (SPPs). Here, we demonstrate the feasibility of low-frequency active plasmonics using semiconductors. We show experimentally that the Bragg scattering of terahertz SPPs on a semiconductor grating can be modified by thermal excitation of free carriers. The transmission of SPPs through the grating at certain frequencies can be switched completely by changing the temperature less than 100°C. This semiconductor switch provides a basis for the development of low-frequency surface-plasmon optical devices.

Keywords

PlasmonSurface plasmon polaritonSurface plasmonGratingSemiconductorTerahertz radiationOptoelectronicsMaterials sciencePolaritonOpticsLocalized surface plasmonPlasmonic lensNanophotonicsScatteringPhysics

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Publication Info

Year
2006
Type
article
Volume
88
Issue
8
Citations
137
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Closed

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Jaime Gómez Rivas, M. Kuttge, H. Kurz et al. (2006). Low-frequency active surface plasmon optics on semiconductors. Applied Physics Letters , 88 (8) . https://doi.org/10.1063/1.2177348

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DOI
10.1063/1.2177348