One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves

Ioannis Chatzakis, Philippe Tassin, Liang Luo, Nian Hai Shen, Lei Zhang, Jigang Wang, Thomas Koschny, C. M. Soukoulis

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Abstract

Emerging technology based on artificial materials containing metallic structures has raised the prospect for unprecedented control of terahertz waves. The functionality of these devices is static by the very nature of their metallic composition, although some degree of tunability can be achieved by incorporating electrically biased semiconductors. Here, we demonstrate a photonic structure by projecting the optical image of a metal mask onto a thin GaAs substrate using a femtosecond pulsed laser source. We show that the resulting high-contrast pattern of photo-excited carriers can create diffractive elements operating in transmission, potentially providing a route to terahertz components with reconfigurable functionality.

Original languageEnglish
Article number043101
JournalApplied Physics Letters
Volume103
Issue number4
DOIs
StatePublished - Jul 22 2013

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    Chatzakis, I., Tassin, P., Luo, L., Shen, N. H., Zhang, L., Wang, J., Koschny, T., & Soukoulis, C. M. (2013). One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves. Applied Physics Letters, 103(4), [043101]. https://doi.org/10.1063/1.4813620