Coupling of terahertz radiation to metallic wire using end-fire technique

Coupling of terahertz radiation to metallic wire using end-fire technique

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Coupling of THz radiation at 625 GHz onto a copper wire is demonstrated. The end-fire technique is used in combination with an axicon to excite the azimuthally polarised surface plasmon polaritons on the wire‘s front facet. A small lateral offset of the wire relative to the optical axis is used to achieve significant plasmon excitation. Coupling efficiencies of about 17% were measured. The coupling mechanism is discussed theoretically using the overlap integral and verify plasmonic excitation and propagation by measuring the radiated field at the wire end.


    1. 1)
      • 1. Federici, J., Moeller, L.: ‘Review of terahertz and subterahertz wireless communications’, J. Appl. Phys., 2010, 107, (111101), pp. 122.
    2. 2)
      • 2. Wang, K., Mittelman, D.M.: ‘Metal wires for terahertz wave guiding’, Nature, 2004, 432, pp. 376379 (doi: 10.1038/nature03040).
    3. 3)
      • 3. Cao, Q., Jahns, J.: ‘Azimuthally polarized surface plasmons as effective terahertz waveguides’, Opt. Express, 2005, 13, (2), pp. 511518 (doi: 10.1364/OPEX.13.000511).
    4. 4)
      • 4. Stegeman, G.I., Wallis, R.F., Maradudin, A.A.: ‘Excitation of surface polaritons by end-fire coupling’, Opt. Lett., 1983, 8, (7), pp. 386388 (doi: 10.1364/OL.8.000386).
    5. 5)
      • 5. Deibel, J.A., Wang, K., Escarra, M.D., Mittelman, D.M.: ‘Enhanced coupling of terahertz radiation to cylindrical wire waveguides’, Opt. Express, 2006, 14, (1), pp. 279290 (doi: 10.1364/OPEX.14.000279).
    6. 6)
      • 6. Jahns, J., Helfert, S.: ‘Introduction to micro- and nanooptics’ (Wiley-VCH, Weinheim, 2012).
    7. 7)
      • 7. Ordal, M.A., Bell, R.J., Alexander, R.W., Long, L.L., Querry, M.R.: ‘Optical properties of fourteen metals in the infrared and far infrared: Al, Co, Cu, Au, Fe, Pb, Mo, Ni, Pd, Pt, Ag, Ti, V, and W’, Appl. Opt., 1985, 24, (24), pp. 44934499 (doi: 10.1364/AO.24.004493).
    8. 8)
      • 8. Saleh, B.E.A., Teich, M.C.: ‘Fundamentals of photonics’ (John Wiley & Sons, New York, 1991).

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