Characteristics of the terahertz radiation from single crystals of N-substituted 2-methyl-4-nitroaniline

被引:52
作者
Hashimoto, H
Takahashi, H
Yamada, T
Kuroyanagi, K
Kobayashi, T
机构
[1] Shizuoka Univ, Fac Engn, Dept Mat Sci & Chem Engn, Hamamatsu, Shizuoka 4328561, Japan
[2] Hamamatsu Photon K K, Cent Res Lab, Hirakuchi, Hamakita 4348601, Japan
[3] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
关键词
D O I
10.1088/0953-8984/13/23/101
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Terahertz (THz) radiation was generated via optical rectification from organic single crystals, i.e. N-substituted (N-benzyl, N-diphenylmethyl, and N-2-naphthylmethyl) derivatives of 2-methyl-4-nitroaniline (MNA), and it was detected by means of the electro-optic sampling method. The intensity and the spectrum of the THz radiation were compared with those of ZnTe and DAST (N, N-dimethylamino-N'-methylstilbazolium p-toluenesulphonate) crystals. The integrated intensity of the THz radiation from the N-benzyl-MNA crystal was two thirds of that for the ZnTe crystal, the best-known practical THz emitter, and was as intense as that for the DAST crystal, the best organic THz emitter ever studied. The spectrum of the ZnTe crystal extended to 3 THz, while that of the N-benzyl MNA and DAST crystals dropped off around 2.5 THz. The THz radiation intensities from all of the organic crystals were compared quantitatively, on the basis of the consideration of molecular arrangements in the crystals. It was suggested that the absorption due to low-frequency phonon modes affected both the intensity and the spectral band shape of the THz radiation.
引用
收藏
页码:L529 / L537
页数:9
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