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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 17, Iss. 5 — May. 1, 2000
  • pp: 851–863

Terahertz waveguides

G. Gallot, S. P. Jamison, R. W. McGowan, and D. Grischkowsky  »View Author Affiliations

JOSA B, Vol. 17, Issue 5, pp. 851-863 (2000)

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Quasi-optical techniques are used to efficiently couple freely propagating pulses of terahertz (THz) electromagnetic radiation into circular and rectangular metal waveguides. We have observed very dispersive, low-loss propagation over the frequency band from 0.65 to 3.5 THz with typical waveguide cross-section dimensions on the order of 300 µm and lengths of 25 mm. Classical waveguide theory is utilized to calculate the coupling coefficients into the modes of the waveguide for the incoming focused THz beam. It is shown that the linearly polarized incoming THz pulses significantly couple only into the TE11,TE12, and TM11 modes of the circular waveguide and the TE10 and TM12 modes of the rectangular guide. The propagation of the pulse through the guide is described as a linear superposition of the coupled propagating modes, each with a unique complex propagation vector. This picture explains in detail all the observed features of the THz pulse emerging from the waveguide. We demonstrate both theoretically and experimentally that it is possible to achieve TE10 single-mode coupling and propagation in a suitably sized rectangular waveguide for an incoming focused, linearly polarized THz pulse with a bandwidth covering many octaves in frequency and that overlaps more than 35 waveguide modes. Finally, to facilitate the application of these THz waveguides to THz time-domain spectroscopy of various configurations of dielectrics in the waveguide including surface layers, we present analytic results for the absorption and the dispersion of such layers.

© 2000 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(300.6270) Spectroscopy : Spectroscopy, far infrared
(310.6870) Thin films : Thin films, other properties
(320.5540) Ultrafast optics : Pulse shaping
(320.7120) Ultrafast optics : Ultrafast phenomena
(350.4010) Other areas of optics : Microwaves

G. Gallot, S. P. Jamison, R. W. McGowan, and D. Grischkowsky, "Terahertz waveguides," J. Opt. Soc. Am. B 17, 851-863 (2000)

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  1. M. van Exter and D. Grischkowsky, “Characterization of an optoelectronic terahertz beam system,” IEEE Trans. Microwave Theory Tech. 38, 1684–1691 (1990). [CrossRef]
  2. D. Grischkowsky, S. Keiding, M. van Exter, and Ch. Fattinger, “Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors,” J. Opt. Soc. Am. B 7, 2006–2015 (1990). [CrossRef]
  3. R. W. McGowan, G. Gallot, and D. Grischkowsky, “Propagation of ultra-wideband, short pulses of THz radiation through sub-mm diameter circular waveguides,” Opt. Lett. 24, 1431–1433 (1999). [CrossRef]
  4. A. Nahata and T. F. Heinz, “Reshaping of freely propagating terahertz pulses by diffraction,” IEEE J. Sel. Top. Quantum Electron. 2, 701–708 (1996). [CrossRef]
  5. J. Bromage, S. Radic, G. P. Agrawal, C. R. Stroud, Jr., P. M. Fauchet, and R. Sobolewsky, “Spatiotemporal shaping of half-cycle terahertz pulses by diffraction through conductive apertures of finite thickness,” J. Opt. Soc. Am. B 15, 1399–1405 (1998). [CrossRef]
  6. C. Winnewisser, F. Lewen, J. Weinzierl, and H. Helm, “Transmission features of frequency-selective components in the far-infrared determined by terahertz time-domain spectroscopy,” Appl. Opt. 38, 3961–3967 (1999). [CrossRef]
  7. J. W. Digby, C. E. Collins, B. M. Towlson, L. S. Karatzas, G. M. Parkhurst, J. M. Chamberlain, J. W. Bowen, R. D. Pollard, R. E. Miles, D. P. Steenson, D. A. Brown, and N. J. Cronin, “Integrated micromachined antenna for 200 GHz operation,” in International Microwave Symposium Digest (Institute of Electrical and Electronics Engineers, New York, 1997), pp. 561–654.
  8. J. Lesurf, Millimeter-Wave Optics, Devices and Systems (Hilger, Bristol, UK, 1990).
  9. A. Taflove, Computational Electrodynamics: The Finite-Difference Time-Domain Method (Artech House, Norwood, Mass., 1995).
  10. P. A. Rizzi, Microwave Engineering, Passive Circuits (Prentice-Hall, Englewood Cliffs, N.J., 1988).
  11. N. Marcuvitz, Waveguide Handbook (Peregrinus, London, 1993).
  12. J. C. Slater, “Microwave electronics,” Rev. Mod. Phys. 18, 441–512 (1946). [CrossRef]
  13. J. C. Slater, Microwave Electronics (Van Nostrand, New York, 1950).

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