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

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited