Spatial polarization variation in terahertz electromagnetic wave focused by off-axis parabolic mirror

Mayuko Takai, Kazunori Shibata, Mitsuharu Uemoto, Shinichi Watanabe

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We have investigated the spatial distribution of the polarization state of a terahertz electromagnetic wave focused by an off-axis parabolic mirror (OPM) in the focal plane. We employed polarization-resolved terahertz time-domain spectroscopy and found that a steep spatial variation in the polarization state appears slightly distant from the focus when a linearly polarized terahertz wave is focused. The spatial variation includes an abrupt change in the polarization state (states change between circular and linear polarizations) within a wavelength. The observed phenomena are confirmed by numerical calculations and are shown to be intrinsic to the reflection from the OPM.

Original languageEnglish
Article number052206
JournalApplied Physics Express
Volume9
Issue number5
DOIs
Publication statusPublished - 2016 May 1

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Terahertz waves
Electromagnetic waves
electromagnetic radiation
Mirrors
Polarization
mirrors
polarization
circular polarization
linear polarization
spatial distribution
Spatial distribution
Spectroscopy
Wavelength
wavelengths
spectroscopy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Spatial polarization variation in terahertz electromagnetic wave focused by off-axis parabolic mirror. / Takai, Mayuko; Shibata, Kazunori; Uemoto, Mitsuharu; Watanabe, Shinichi.

In: Applied Physics Express, Vol. 9, No. 5, 052206, 01.05.2016.

Research output: Contribution to journalArticle

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