Miyamoto Katsuhiko, Minamide Hiroaki, Fujiwara Masazumi, Hashimoto Hideki, Ito Hiromasa
RIKEN Sendai, Aramaki-Aoba, Sendai, Japan.
Opt Lett. 2008 Feb 1;33(3):252-4. doi: 10.1364/ol.33.000252.
Widely tunable terahertz (THz)-wave generation using difference frequency generation (DFG) in an organic N-benzyl-2-methyl-4-nitroaniline (BNA) crystal was demonstrated. To our knowledge, this is the first report of THz-wave generation by BNA DFG. Large, high-quality single crystals of BNA (phi 8 mm x 30 mm) were grown using the vertical Bridgman method. The nonlinear optical (NLO) coefficient d(33) of the BNA crystal is approximately 234 pm/V, which is the largest value reported for any yellow NLO material. The collinear phase-matching condition of the type-0 configuration is satisfied using a 0.7-1 microm band pump wavelength. We generated THz waves using an organic BNA crystal; the generation range is 0.1-15 THz.
利用有机N-苄基-2-甲基-4-硝基苯胺（BNA）晶体中的差频产生（DFG）实现了广泛可调谐的太赫兹（THz）波产生。据我们所知，这是关于BNA DFG产生太赫兹波的首次报道。使用垂直布里奇曼法生长出了尺寸为8 mm×30 mm的高质量大尺寸BNA单晶。BNA晶体的非线性光学（NLO）系数d(33)约为234 pm/V，这是已报道的任何黄色NLO材料中的最大值。通过0.7 - 1微米波段的泵浦波长满足了0型配置的共线相位匹配条件。我们使用有机BNA晶体产生了太赫兹波；产生范围为0.1 - 15太赫兹。
