Terahertz wave generation from spontaneously formed nanostructures in silver nanoparticle ink.
Terahertz wave generation from spontaneously formed nanostructures in silver nanoparticle ink.
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DOI：
10.1364/ol.41.002125
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发表时间：
2016-05
期刊：
影响因子：
3.6
通讯作者：
Kosaku Kato;K. Takano;Y. Tadokoro;M. Nakajima
中科院分区：
文献类型：
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作者：
Kosaku Kato;K. Takano;Y. Tadokoro;M. Nakajima
我们演示了在飞秒激光脉冲照射下，银纳米粒子墨水产生太赫兹脉冲，该墨水最初是为印刷电子产品开发的。使用金属纳米颗粒墨水，无需光刻技术即可轻松大面积制造金属纳米结构。烘烤后的墨水发出太赫兹脉冲，自发形成约 100 nm 的纳米结构。根据烘烤温度依赖性和偏振测量的结果，太赫兹的产生归因于这些纳米结构周围增强的局部场引起的非线性偏振。这项研究通过将喷墨打印机绘制的微米级结构与烘烤过程中形成的纳米级结构相结合，为未来开发在近红外光和太赫兹波中具有共振的太赫兹发射器铺平了道路。
We demonstrate terahertz pulse generation from silver nanoparticle ink, originally developed for printed electronics, under irradiation by femtosecond laser pulses. Using metal nanoparticle ink, metallic nanostructures can be easily made in a large area without lithographic techniques. Terahertz pulses were emitted from the baked ink, having spontaneously formed nanostructures of ∼100 nm. From the results of the baking temperature dependence and the polarization measurement, the terahertz generation is attributed to the nonlinear polarization induced by the enhanced local fields around these nanostructures. This study paves the way for the future development of terahertz emitters which have resonances in both the near-infrared light and the terahertz wave, by combining micrometer-scale structures drawn by an inkjet printer and nanometer-scale structures formed during the baking process.