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GRAPHENE PLASMONS

Telecom meets terahertz

Nature Photonics volume 12, pages 3–4 (2018)Cite this article

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Excitation and gate tuning of terahertz plasmons in dual-layer graphene integrated into on-chip telecom photonic waveguides using infrared lasers has now been demonstrated. This may open the door to atomically thick optoelectronic devices for security, tomography or data processing.

Terahertz (THz) radiation (with wavelengths ranging from 0.03 to 3 mm) is extremely attractive for many vital applications such as communications, security, molecular recognition and medical imaging, among others1. However, compact technology for the generation and manipulation of THz radiation is still in its infancy. In particular, its use at the nanoscale (where the THz waves would need to be compressed to deeply subwavelength volumes — far below the classical diffraction limit), which is desirable, for example, for high-resolution THz imaging or sensing of small amounts of matter, has been elusive so far and, until now, has been seen only as a future perspective. For these reasons, the pursuit of novel materials able to produce and guide THz waves is appealing.

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Fig. 1: Schematic of the graphene-based on-chip integrated device.

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Authors and Affiliations

  1. CIC Nanogune, Donostia-San Sebastián, Spain

    Alexey Y. Nikitin

  2. Donostia International Physics Center, Donostia-San Sebastián, Spain

    Alexey Y. Nikitin

  3. IKERBASQUE, Basque Foundation for Science, Bilbao, Spain

    Alexey Y. Nikitin

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  1. Alexey Y. Nikitin
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Correspondence to Alexey Y. Nikitin.

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Nikitin, A.Y. Telecom meets terahertz. Nature Photon 12, 3–4 (2018). https://doi.org/10.1038/s41566-017-0073-4

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