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We characterize the operation of a 4times4 electrically-driven terahertz metamaterial spatial modulator, and demonstrate high modulation uniformly at each pixel with minimal cross-talk. This modulator will enable high-speed terahertz imaging in a single-pixel imaging system.
We demonstrate hybrid metamaterial devices that are able to electrically switch their resonances therefore the terahertz transmission properties at room temperature. The interrelated amplitude switching and phase shifting allow for fast broadband external terahertz modulation.
We present a hybrid metamaterial semiconductor device capable of 20% tunability of the center resonance frequency via photoexcitation of the semiconductor regions, thereby addressing the metamaterials drawback of narrow bandwidth operation.
We apply terahertz microscopy for studying metamaterials with resonances in the terahertz band. The data provide insight into the metamaterial’s local response on scales much smaller than the unit cell of the structure.
Planar electric metamaterials fabricated on thin, flexible substrates are studied using terahertz-time domain spectroscopy. Transmission measurements are performed to analyze dielectric properties on single and multiple stacked samples and reveal strong resonances at 1.2 THz.
A lumped-element circuit model is shown to accurately describe the behavior of terahertz metafilms, or planar metamaterials. The model provides insight into the proper application of effective medium approximations in determining metafilm constitutive parameters.
Planar electric metamaterials fabricated on thin, flexible substrates are studied using terahertz-time domain spectroscopy. Transmission measurements are performed to analyze dielectric properties on single and multiple stacked samples and reveal strong resonances at 1.2 THz.
A lumped-element circuit model is shown to accurately describe the behavior of terahertz metafilms, or planar metamaterials. The model provides insight into the proper application of effective medium approximations in determining metafilm constitutive parameters.
We apply terahertz microscopy for studying metamaterials with resonances in the terahertz band. The data provide insight into the metamaterialpsilas local response on scales much smaller than the unit cell of the structure.
We present a hybrid metamaterial semiconductor device capable of 20% tunability of the center resonance frequency via photoexcitation of the semiconductor regions, thereby addressing the metamaterials drawback of narrow bandwidth operation.
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