Enhanced terahertz magnetic dipole response by subwavelength fiber

Shaghik Atakaramians*, Ilya V. Shadrivov, Andrey E. Miroshnichenko, Alessio Stefani, Heike Ebendorff-Heidepriem, Tanya M. Monro, V. Shahraam Afshar

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Dielectric sub-wavelength particles have opened up a new platform for realization of magnetic light. Recently, we have demonstrated that a dipole emitter by a sub-wavelength fiber leads to an enhanced magnetic response. Here, we experimentally demonstrate an enhanced magnetic dipole source in the terahertz frequency range. By placing the fiber next to the hole in a metal screen, we find that the radiation power can be enhanced more than one order of magnitude. The enhancement is due to the excitation of the Mie-type resonances in the fiber. We demonstrate that such a system is equivalent to a double-fiber system excited by a magnetic source. This coupled magnetic dipole and optical fiber system can be considered a unit cell of metasurfaces for manipulation of terahertz radiation and is a proof-of-concept of a possibility to achieve enhanced radiation of a dipole source in proximity of a sub-wavelength fiber. It can also be scaled down to optical frequencies opening up promising avenues for developing integrated nanophotonic devices such as nanoantennas or lasers on fibers.
    Original languageEnglish
    Article number051701
    JournalAPL Photonics
    Issue number5
    Number of pages10
    Publication statusPublished - 2018


    • Biology
    • Magnetism, Basic Concepts and Phenomena
    • Electromagnetic Waves
    • Fiber Optics
    • Magnetism
    • Molecular biology
    • Optical fibers
    • Terahertz waves
    • Integrated nanophotonic devices
    • Magnetic response
    • Magnetic sources
    • Optical fiber systems
    • Optical frequency
    • Proof of concept
    • Terahertz frequency range
    • Terahertz radiation
    • Fibers


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