Reciprocity between terahertz waves and doped BaTiO3/SrTiO3 multilayer films
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摘要: 掺杂半导体中的载流子吸收在THz波段非常明显,其相互作用研究是研制THz通信中的关键器件之一的基础。采用氟化氪(KrF)脉冲准分子激光烧蚀沉积(PLD)技术,制备了Ni掺杂BaTiO3/SrTiO3多层膜。基于辐射频率为3.09 THz、脉冲功率为10 mW量级的THz 量子级联激光器(QCL)光源研究了太赫兹波在Ni掺杂BaTiO3/SrTiO3多层膜中的传输,发现损耗主要是Ni颗粒的非共振吸收导致。Abstract: The carrier absorption of the doped semiconductor materials is evident in terahertz (THz). The reciprocity study is the basis for preparing the key apparatus in the THz communications. Using a pulsed KrF excimer laser ablation (PLD) technique, the Ni-doped BaTiO3/SrTiO3 multilayer film has been prepared. Based on 3.09 THz quantum cascade laser (QCL) with the peak optical power about 10 mW, the transition of THz waves in the Ni-doped BaTiO3/SrTiO3 multilayer films is studied. It is found that the main loss may be due to the nonresonant absorption of Ni particles.
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Key words:
- terahertz /
- quantum cascade laser /
- multilayer film /
- laser ablation deposition /
- doping
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