Polarization detection of terahertz radiation via the electro-optic effect using zinc blende crystal symmetry

Kenichi Oguchi, Naoya Yasumatsu, Shinichi Watanabe

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Abstract

We provide a frequency-domain picture of the electro-optic (EO) detection of elliptically polarized terahertz radiation utilizing the crystal angle dependence of the EO effect using zinc blende crystal symmetry. In contrast to EO detection of a linearly polarized terahertz pulse, the measured EO signal would not be a replica of the terahertz pulse, even though the phase-matching condition is completely fulfilled. However, the rotation of the EO crystal reduces the complexity, and the ellipticity and the angle of rotation of each frequency component of the elliptically polarized terahertz pulse can be determined irrespective of what kind of zinc blende crystals are used for the EO detection. We experimentally show that the ellipticity and angle of rotation are reproducibly obtained by using three different crystals with different thicknesses and compositions. Direct detection of the elliptically polarized terahertz radiation enables us to precisely determine the optical axis and retardation of a quartz crystal using the Poincaré sphere representation of the state of polarization.

Original languageEnglish
Pages (from-to)3170-3180
Number of pages11
JournalJournal of the Optical Society of America B: Optical Physics
Volume31
Issue number12
DOIs
Publication statusPublished - 2014 Dec 1

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ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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