THz generation from GaP rod-type waveguides

Jun Ichi Nishizawa, Ken Suto, Tadao Tanabe, Kyosuke Saito, Tomoyuki Kimura, Yutaka Oyama

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Terahertz (THz) generation was demonstrated from GaP rod-type waveguides via difference-frequency-mixing of near-infrared light using a collinear phase-matching condition. THz output peaks were observed, and appeared at frequencies corresponding to the fundamental and high-order waveguide modes. Interestingly, the position of the fundamental mode shifted to a higher frequency for a smaller waveguide cross-section, which is attributed to the waveguide confinement of the THz wave. The conversion efficiency was enhanced in the waveguide with a cross section of 200 μm × 160 μm as compared to that in bulk GaP crystals.

Original languageEnglish
Pages (from-to)143-145
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number3
Publication statusPublished - 2007 Feb 1
Externally publishedYes


  • Collinear phase matching
  • GaP
  • Optical waveguide
  • Phonon-polariton
  • Terahertz (THz)-wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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