Spatial properties of a terahertz beam generated from a two-color air plasma

Pernille Klarskov Pedersen, Tianwu Wang, Jonas Christian Due Buron, Andrew Strikwerda, Peter Uhd Jepsen

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

We present a spatial characterization of terahertz (THz) beams generated from a two-color air plasma under different conditions by measuring full 3D beam profiles using a commercial THz camera. We compare two THz beam profiles emitted from plasmas generated by 35 fs and 100 fs laser pulses, and show that the spatial properties of the two THz beams do not change significantly. For the THz beam profile generated by the 35 fs pulse, the spatial effect of eliminating the lower frequencies is investigated by implementing two crossed polarizers working as a high-pass filter. We show that this reduces the beam waist, and that the beam spot shape changes from Lorentzian to Gaussian. Finally, we observe a forward-propagating Gaussian THz beam by spatially filtering away the conical off-axis radiation with a 1 cm aperture.
Original languageEnglish
Article number88460R
JournalProceedings of the SPIE - The International Society for Optical Engineering
Volume8846
Number of pages9
ISSN0277-786X
DOIs
Publication statusPublished - 2013
EventSPIE Optics + Photonics : Terahertz Emitters, Receivers, and Applications IV - San Diego, California, United States
Duration: 25 Aug 2013 → …

Conference

ConferenceSPIE Optics + Photonics : Terahertz Emitters, Receivers, and Applications IV
CountryUnited States
CitySan Diego, California
Period25/08/2013 → …

Keywords

  • THz
  • Beam profiling
  • THz camera
  • Two-color air plasma

Fingerprint Dive into the research topics of 'Spatial properties of a terahertz beam generated from a two-color air plasma'. Together they form a unique fingerprint.

Cite this