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Metal wires for terahertz wave guiding

Author

Listed:
  • Kanglin Wang

    (Rice University)

  • Daniel M. Mittleman

    (Rice University)

Abstract

Sources and systems for far-infrared or terahertz (1 THz = 1012 Hz) radiation have received extensive attention in recent years, with applications in sensing, imaging and spectroscopy1,2,3,4,5,6,7,8,9,10. Terahertz radiation bridges the gap between the microwave and optical regimes, and offers significant scientific and technological potential in many fields. However, waveguiding in this intermediate spectral region still remains a challenge. Neither conventional metal waveguides for microwave radiation, nor dielectric fibres for visible and near-infrared radiation can be used to guide terahertz waves over a long distance, owing to the high loss from the finite conductivity of metals or the high absorption coefficient of dielectric materials in this spectral range. Furthermore, the extensive use of broadband pulses in the terahertz regime imposes an additional constraint of low dispersion, which is necessary for compatibility with spectroscopic applications. Here we show how a simple waveguide, namely a bare metal wire, can be used to transport terahertz pulses with virtually no dispersion, low attenuation, and with remarkable structural simplicity. As an example of this new waveguiding structure, we demonstrate an endoscope for terahertz pulses.

Suggested Citation

  • Kanglin Wang & Daniel M. Mittleman, 2004. "Metal wires for terahertz wave guiding," Nature, Nature, vol. 432(7015), pages 376-379, November.
  • Handle: RePEc:nat:nature:v:432:y:2004:i:7015:d:10.1038_nature03040
    DOI: 10.1038/nature03040
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    Cited by:

    1. Yang Cao & Kathirvel Nallappan & Guofu Xu & Maksim Skorobogatiy, 2022. "Add drop multiplexers for terahertz communications using two-wire waveguide-based plasmonic circuits," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    2. Junliang Dong & Alessandro Tomasino & Giacomo Balistreri & Pei You & Anton Vorobiov & Étienne Charette & Boris Le Drogoff & Mohamed Chaker & Aycan Yurtsever & Salvatore Stivala & Maria A. Vincenti & C, 2022. "Versatile metal-wire waveguides for broadband terahertz signal processing and multiplexing," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    3. Ergin Dinc & Syed Sheheryar Bukhari & Anas Al Rawi & Eloy Lera Acedo, 2022. "Investigating the upper bound of high-frequency electromagnetic waves on unshielded twisted copper pairs," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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