Generation of single-cycle terahertz pulse using Cherenkov phase matching with 4-dimethylamino-N′-methyl-4′-stilbazolium tosylate crystal
Generation of single-cycle terahertz pulse using Cherenkov phase matching with 4-dimethylamino-N′-methyl-4′-stilbazolium tosylate crystal
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DOI：
10.7567/apex.10.062601
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发表时间：
2017-05
影响因子：
2.3
通讯作者：
H. Uchida;Kengo Oota;Tsubasa Minami;K. Takeya;K. Kawase
中科院分区：
文献类型：
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作者：
H. Uchida;Kengo Oota;Tsubasa Minami;K. Takeya;K. Kawase
首次报道了利用有机非线性光学晶体4-二甲氨基-N ′-甲基-4 ′-苯乙烯基甲苯磺酸盐（DAST）和棱镜耦合切伦科夫相位匹配方法产生单周期宽频带（超过6 THz）、高动态范围（超过70 dB）的太赫兹脉冲。棱镜耦合方法允许使用DAST晶体作为切伦科夫型发射器，以减少晶体的光吸收，从而产生单周期和半周期THz脉冲形状，分别使用偶极和蝴蝶结天线进行检测。产生的太赫兹脉冲适用于各种太赫兹波应用技术，如层析成像。
This is the first report of single-cycle terahertz (THz)-wave pulse generation with a wide band (over 6 THz) and a high dynamic range (over 70 dB) using an organic nonlinear optical crystal, 4-dimethylamino-N′-methyl-4′-stilbazolium tosylate (DAST), and the prism-coupled Cherenkov phase-matching method. The prism-coupled approach allowed the use of a DAST crystal as a Cherenkov-type emitter for reduced light absorption by the crystal, resulting in the generation of single- and half-cycle THz pulse shapes, which were detected using dipole and bow-tie antennas, respectively. The resulting THz pulse generation is suitable for various THz-wave application technologies, such as tomography.