IBM researchers managed to develop a graphene insulator superlattice that achieves a Teraherz frequency notch filter and a linear polarizer. These kinds of devices can be used in mid- and far-infrared photonic devices, including detectors, modulators and three-dimensional metamaterials. Terhertz is interesting because this kind of frequencies can penetrate paper, wood and other solid objects.

IBM managed to create these devices by using a multi-layer graphene/instulator superlattice and a multi-layer stack structure in microdisk arrays.

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Versarien - Think you know graphene? Think again! Versarien - Think you know graphene? Think again!