Concept of annular vector beam generation at terahertz wavelengths via a nonlinear parametric process

Kyosuke Saito, Tadao Tanabe, Yutaka Oyama

研究成果: Article査読

3 被引用数 (Scopus)

抄録

In this paper, we describe our theoretical investigation and calculations for a terahertz (THz)-wave profile generated by difference frequency mixing (DFM) of focused, cylindrically symmetric, and polarized optical vector beams. Using vector diffraction theory, the second-order nonlinear polarization was estimated from the electric field components of the optical pump beams penetrating uniaxial, birefringent nonlinear optics (NLO) crystals, GaSe and CdSe. The approximate beam patterns of the THz waves were simulated using DFM formulation. The intensity patterns of the THz waves for GaSe and CdSe showed sixfold symmetry and cylindrical symmetry, respectively, based on the nonlinear susceptibility tensor of the crystals. As the phase-matching angle θPM was constant with respect to the c axis of the NLO crystals, an annular vector beam with a narrow width was expected.

本文言語English
ページ(範囲)2769-2775
ページ数7
ジャーナルApplied Optics
54
10
DOI
出版ステータスPublished - 2015 4 1
外部発表はい

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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