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Concise mechanism of terahertz wave emission from mesoscopic crystals of Bi_2Sr_2CaCu_2O_8

机译:Bi_2Sr_2CaCu_2O_8介观晶体发射太赫兹波的简捷机理

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摘要

The terahertz (THz) emission mechanism in Bi_2Sr_2CaCu_2O_8 with an external magnetic field is studied theoretically. A radiation power formula for a small-size sample is proposed. The total power is proportional to the square of the number of superconducting layers and the frequency. Under the small-size limitation, the angular distribution of the power is similar to that in the dipole radiation. The THz power output is in the same order of magnitude as the experimental ones. By analyzing the spectra, a series of size-dependent intrinsic frequencies are observed. We show that the radiation power is enhanced when the supercurrent frequency tuned by the external current resonates with the intrinsic ones.
机译:理论上研究了Bi_2Sr_2CaCu_2O_8中具有外部磁场的太赫兹(THz)发射机理。提出了小尺寸样品的辐射功率公式。总功率与超导层数和频率的平方成正比。在小尺寸限制下,功率的角分布类似于偶极辐射中的角分布。太赫兹功率输出与实验功率的数量级相同。通过分析频谱,可以观察到一系列尺寸相关的固有频率。我们表明,当由外部电流调谐的超电流频率与固有频率谐振时,辐射功率会提高。

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  • 来源
    《Physical review》 |2010年第18期|p.184514.1-184514.5|共5页
  • 作者单位

    Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China,Center for Statistical and Theoretical Condensed Matter Physics, Zhejiang Normal University, Jinhua 321004,People's Republic of China;

    Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China, Center for Statistical and Theoretical Condensed Matter Physics, Zhejiang Normal University, Jinhua 321004,People's Republic of China;

    rnDepartment of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    tunneling phenomena; point contacts; weak links; josephson effects; optical properties; josephson devices;

    机译:隧道现象;点接触;薄弱环节;约瑟夫森效应;光学性质约瑟夫森设备;

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