OSA's Digital Library

Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 17, Iss. 1 — Jan. 1, 2000
  • pp: 74–83

Terahertz pulse propagation in the near field and the far field

Andreas Gürtler, Carsten Winnewisser, Hanspeter Helm, and Peter Uhd Jepsen  »View Author Affiliations


JOSA A, Vol. 17, Issue 1, pp. 74-83 (2000)
http://dx.doi.org/10.1364/JOSAA.17.000074


View Full Text Article

Enhanced HTML    Acrobat PDF (372 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We present a detailed investigation of the propagation properties of beams of ultrashort terahertz (THz) pulses emitted from large-aperture (LA) antennas. The large area of the emitter is demonstrated to have substantial influence on the temporal pulse profile in both the near field and the far field. We perform a numerical analysis based on scalar and vectorial broadband diffraction theory and are able to distinguish between near-field and far-field contributions to the total THz signal. We find that the THz beam from a LA antenna propagates like a Gaussian beam and that the temporal profile of the THz pulse, measured in the near field, contains information about the temporal and spatial field distribution on the emitter surface, which is intrinsically connected to the carrier dynamics of the antenna substrate. As a result of pulse reshaping, focusing of the THz beam leads to a reduced relative pulse momentum, with implications in THz field-ionization experiments.

© 2000 Optical Society of America

OCIS Codes
(260.1960) Physical optics : Diffraction theory
(260.3090) Physical optics : Infrared, far
(320.5390) Ultrafast optics : Picosecond phenomena
(320.5540) Ultrafast optics : Pulse shaping

History
Original Manuscript: June 14, 1999
Revised Manuscript: September 14, 1999
Manuscript Accepted: September 10, 1999
Published: January 1, 2000

Citation
Andreas Gürtler, Carsten Winnewisser, Hanspeter Helm, and Peter Uhd Jepsen, "Terahertz pulse propagation in the near field and the far field," J. Opt. Soc. Am. A 17, 74-83 (2000)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-1-74


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. P. Uhd Jepsen, S. R. Keiding, “Radiation patterns from lens-coupled terahertz antennas,” Opt. Lett. 20, 807–809 (1995). [CrossRef]
  2. P. Uhd Jepsen, R. H. Jacobsen, S. R. Keiding, “Generation and detection of terahertz pulses from biased semiconductor antennas,” J. Opt. Soc. Am. B 13, 2424–2436 (1996). [CrossRef]
  3. J. Bromage, S. Radic, G. P. Agrewal, C. R. Stroud, P. M. Fauchet, R. Sobolewski, “Spatiotemporal shaping of terahertz pulses,” Opt. Lett. 22, 627–629 (1997). [CrossRef] [PubMed]
  4. J. Bromage, S. Radic, G. P. Agrawal, C. R. Stroud, P. M. Fauchet, R. Sobolewski, “Spatiotemporal shaping of half-cycle terahertz pulses by diffraction through conductive apertures of finite thickness,” J. Opt. Soc. Am. B 15, 1953–1959 (1998). [CrossRef]
  5. D. You, P. H. Bucksbaum, “Propagation of half-cycle far infrared pulses,” J. Opt. Soc. Am. B 14, 1651–1655 (1997). [CrossRef]
  6. S. Feng, H. G. Winful, R. W. Hellwarth, “Gouy shift and temporal reshaping of focused single-cycle electromagnetic pulses,” Opt. Lett. 23, 385–387 (1998). [CrossRef]
  7. C. Winnewisser, F. Lewen, H. Helm, “Transmission characteristics of dichroic filters measured by THz time-domain spectroscopy,” Appl. Phys. A: Solids Surf. 66, 593–598 (1998). [CrossRef]
  8. E. Budiarto, N.-W. Pu, S. Jeong, J. Bokor, “Near-field propagation of terahertz pulses from a large-aperture antenna,” Opt. Lett. 23, 213–215 (1998). [CrossRef]
  9. C. Raman, C. W. S. Conover, C. I. Sukenik, P. H. Bucksbaum, “Ionization of Rydberg wave packets by subpicosecond, half-cycle electromagnetic pulses,” Phys. Rev. Lett. 76, 2436–2439 (1996). [CrossRef] [PubMed]
  10. R. R. Jones, “Creating and probing electronic wavepackets using half-cycle pulses,” Phys. Rev. Lett. 76, 3927–3930 (1996). [CrossRef] [PubMed]
  11. J. W. Goodman, Introduction to Fourier Optics, 2nd ed. (McGraw-Hill, New York, 1996).
  12. J. D. Jackson, Classical Electrodynamics, 2nd ed. (Wiley, New York, 1975).
  13. J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, “Saturation properties of large-aperture photoconducting antennas,” IEEE J. Quantum Electron. 28, 1607–1614 (1992). [CrossRef]
  14. M. C. Nuss, D. H. Auston, F. Capasso, “Direct subpicosecond measurement of carrier mobility of photoexcited electrons in gallium arsenide,” Phys. Rev. Lett. 58, 2355–2358 (1987). [CrossRef] [PubMed]
  15. J. A. Kash, J. C. Tsang, J. M. Hvam, “Subpicosecond time-resolved Raman spectroscopy of LO phonons in GaAs,” Phys. Rev. Lett. 54, 2151–2154 (1985). [CrossRef] [PubMed]
  16. A. Yariv, Quantum Electronics, 3rd ed. (Wiley, New York, 1989).
  17. Homepage of the Terahertz Group, Department of Molecular and Optical Physics, University of Freiburg, Freiburg, Germany: http://frhewww.physik.uni-freiburg.de/∼puhd/homepage .
  18. Q. Wu, X.-C. Zhang, “Free-space electro-optic sampling of terahertz beams,” Appl. Phys. Lett. 67, 3523–3525 (1995). [CrossRef]
  19. P. Uhd Jepsen, M. Schall, V. Schyja, S. R. Keiding, H. Helm, “Detection of THz pulses by phase retardation in lithium tantalate,” Phys. Rev. E 53, R3052–R3054 (1996). [CrossRef]
  20. C. Winnewisser, P. Uhd Jepsen, M. Schall, V. Schyja, H. Helm, “Electro-optic detection of THz radiation in LiTaO3,LiNbO3, and ZnTe,” Appl. Phys. Lett. 70, 3069–3071 (1997). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited