Determination of the polarization states of an arbitrary polarized terahertz beam: Vectorial vortex analysis

Toshitaka Wakayama, Takeshi Higashiguchi, Hiroki Oikawa, Kazuyuki Sakaue, Masakazu Washio, Motoki Yonemura, Toru Yoshizawa, J. Scott Tyo, Yukitoshi Otani

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Vectorial vortex analysis is used to determine the polarization states of an arbitrarily polarized terahertz (0.1-1.6 THz) beam using THz achromatic axially symmetric wave (TAS) plates, which have a phase retardance of Δ = 163° and are made of polytetrafluorethylene. Polarized THz beams are converted into THz vectorial vortex beams with no spatial or wavelength dispersion, and the unknown polarization states of the incident THz beams are reconstructed. The polarization determination is also demonstrated at frequencies of 0.16 and 0.36 THz. The results obtained by solving the inverse source problem agree with the values used in the experiments. This vectorial vortex analysis enables a determination of the polarization states of the incident THz beam from the THz image. The polarization states of the beams are estimated after they pass through the TAS plates. The results validate this new approach to polarization detection for intense THz sources. It could find application in such cutting edge areas of physics as nonlinear THz photonics and plasmon excitation, because TAS plates not only instantaneously elucidate the polarization of an enclosed THz beam but can also passively control THz vectorial vortex beams.

Original languageEnglish (US)
Article number9416
JournalScientific reports
Volume5
DOIs
StatePublished - Mar 24 2015

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Determination of the polarization states of an arbitrary polarized terahertz beam: Vectorial vortex analysis'. Together they form a unique fingerprint.

  • Cite this

    Wakayama, T., Higashiguchi, T., Oikawa, H., Sakaue, K., Washio, M., Yonemura, M., Yoshizawa, T., Tyo, J. S., & Otani, Y. (2015). Determination of the polarization states of an arbitrary polarized terahertz beam: Vectorial vortex analysis. Scientific reports, 5, [9416]. https://doi.org/10.1038/srep09416