Tunable Fully Absorbing Metasurfaces For Efficient Thz Detection
2020 45TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)(2020)
Abstract
Terahertz photoconductive antennas with a nanostructured active region have been actively investigated recently with a goal to achieve high efficiency THz detectors and emitters. Here we provide a novel design of perfectly-absorbing photoconductive region without plasmonic elements using a metasurface, and provide a systematic method by which the metasurface can be designed to work optimally for varying optical gate frequencies across the GaAs band-gap. This paves the way to using metasurface devices for THz detection and other applications in a wide range of laser systems operating at different wavelengths or with different photoconductive materials.
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Key words
tunable fully absorbing metasurfaces,THz detection,terahertz photoconductive antennas,nanostructured active region,THz detectors,optical gate frequencies,metasurface devices,photoconductive materials,THz emitters,perfectly-absorbing photoconductive region,band-gap,laser systems,GaAs
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