期刊
OPTICS EXPRESS
卷 17, 期 17, 页码 14832-14838出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.014832
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资金
- Japan Society for the Promotion of Science (JSPS) [19206009]
- Grants-in-Aid for Scientific Research [19206009] Funding Source: KAKEN
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 phase-matching 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 THz-wave generation and increased the power output to ten times that obtained using previous methods. (C) 2009 Optical Society of America
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