Widely tunable terahertz-wave source using an organic DAST crystal

Tetsuo Taniuchi, Shuji Okada, Hachiro Nakanishi

Research output: Contribution to journalArticlepeer-review


Widely tunable terahertz (THz) waves from 2 to 20 THz were generated in a 4-N, N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST) crystal by difference frequency mixing. We developed a dual-wavelength optical parametric oscillator (OPO) near 1550 nm using two KTP crystals as a light source. Power enhancement of THz-wave generation exceeding 100 nJ was achieved using high-quality DAST crystals by improving the OPO. Our tunable THz-wave source, which consists of a DAST and a dual wavelength OPO, should be useful for practical THz-imaging, THz-ranging, and spectroscopic applications.

Original languageEnglish
Pages (from-to)57-60
Number of pages4
JournalNonlinear Optics Quantum Optics
Issue number1-4 SPEC. ISS.
Publication statusPublished - 2005 Dec 19


  • DAST
  • Difference frequency generation
  • Nonlinear optics
  • Optical parametric oscillation
  • Organic crystal
  • Terahertz

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Instrumentation


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