Moving vortex lattice in type-II superconductors can result in the radiation of electromagnetic waves in the range of terahertz frequency. The vortex flow dynamics in superconductors follow the London equation. In this paper, the effects of the superconductor coherence length and the London penetration depth on the radiated power is investigated by solving the London equation in the presence of vortices. The results show that by decreasing the coherence length, the radiation power will significantly increase. Also, it is possible to obtain more radiated power with a sharp peak by increasing the penetration depth. Further investigation of the effect of Joule heating reveals that radiation power is almost independent of temperature when we are far from critical temperature. But on the other hand, near the critical temperature, the radiation power is strongly dependent on the temperature variation. Also, by increasing the bias current, the radiation power will augment, and the frequency of radiated peaks will change accordingly.

中文翻译：

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焦耳加热对超导体介质中太赫兹辐射的影响

II 型超导体中的移动涡旋晶格会导致太赫兹频率范围内的电磁波辐射。超导体中的涡流动力学遵循伦敦方程。在本文中，通过求解存在涡流的伦敦方程，研究了超导体相干长度和伦敦穿透深度对辐射功率的影响。结果表明，通过减小相干长度，辐射功率将显着增加。此外，通过增加穿透深度，可以获得更多具有尖峰的辐射功率。对焦耳热效应的进一步研究表明，当我们远离临界温度时，辐射功率几乎与温度无关。但另一方面，在临界温度附近，辐射功率强烈依赖于温度变化。此外，通过增加偏置电流，辐射功率会增加，辐射峰值的频率也会相应改变。