Continuous-wave frequency-tunable terahertz-wave generation from GaP

Jun Ichi Nishizawa, Tadao Tanabe, Ken Suto, Yusuke Watanabe, Tetsuo Sasaki, Yutaka Oyama

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


Continuous-wave (CW) single-frequency terahertz (THz) waves were generated using difference-frequency generation via excitation of phonon-polaritons in GaP. The two pump sources were an external cavity laser diode (LD) and an LD-pumped Nd :YAG laser. The power density of the latter beam was enhanced by using a ytterbium-doped fiber amplifier. The two incident beams were focused to near the wavelength of THz waves. This optical alignment enabled us to generate frequency-tunable CW THz waves in the 0.69-2.74 THz range. With a fixed angle between the pump beams, we obtained a frequency bandwidth as large as 600 GHz.

Original languageEnglish
Pages (from-to)2008-2010
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number19
Publication statusPublished - 2006 Oct 1
Externally publishedYes


  • Continuous-wave (CW)
  • Frequency-tunable
  • GaP
  • Phase matching
  • 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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