Optimized terahertz-wave generation using BNA-DFG

Katsuhiko Miyamoto, Seigo Ohno, Masazumi Fujiwara, Hiroaki Minamide, Hideki Hashimoto, Hiromasa Ito

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)


An effective and widely tunable means of producing terahertz (THz) radiation using difference-frequency generation (DFG) in an organic N-benzyl-2-methyl-4-nitroaniline (BNA) crystal was demonstrated by optimizing the pump wavelengths. We calculated the (wideband) refractive index and coherence length mapping of BNA to establish the optimum phase-matching condition of the DFG configuration. To satisfy the phasematching conditions over the range 0.1-20 THz, both pump wavelengths were varied from 780 to 950 nm, and the optical wavelength dependency of the THz-wave output was clearly observed. We expanded the range of THzwave generation and increased the power output to ten times that obtained using previous methods.

Original languageEnglish
Pages (from-to)14832-14838
Number of pages7
JournalOptics Express
Issue number17
Publication statusPublished - 2009 Aug 17


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