论文标题
相对论飞行等离子镜的反射率和光谱
Reflectivity and Spectrum of Relativistic Flying Plasma Mirrors
论文作者
论文摘要
已经提出，由激光引起的飞行等离子体镜被认为是产生少量循环EUV或X射线激光器的一种有希望的方法。此外，如果这样的相对论等离子体镜可以加速，那么它将用作模拟黑洞，以研究与黑洞霍金蒸发相关的信息损失悖论。在这些应用中，通常依赖频率的反射率会影响传出的光子光谱，因此会影响对正在研究的物理学的分析。在本文中，通过一维粒子中（PIC）模拟对这两个问题进行分析和数值研究。根据我们的仿真结果，我们提出了一个新模型，该模型比以前研究的模型更好地估计了反射率。此外，我们发现高斯事件波的反射光谱的峰值频率偏离了预期值$4γ^2Ω$，这是由于反射率对事件波的频率的依赖性。
Flying plasma mirrors induced by intense lasers has been proposed as a promising way to generate few-cycle EUV or X-ray lasers. In addition, if such a relativistic plasma mirror can accelerate, then it would serve as an analog black hole to investigate the information loss paradox associated with the black hole Hawking evaporation. Among these applications, the reflectivity, which is usually frequency-dependent, would affect the outgoing photon spectrum and therefore impact on the analysis of the physics under investigation. In this paper, these two issues are investigated analytically and numerically with one-dimensional particle-in-cell (PIC) simulations. Based on our simulation results, we propose a new model that provides a better estimate of the reflectivity than those studied previously. Besides, we found that the peak frequency of the reflected spectrum of a gaussian incident wave deviates from the expected value, $4γ^2ω$, due to the dependence of reflectivity on the frequency of the incident wave.
