光学黑洞激光器
Optical black hole lasers
摘要：
使用数值模拟，我们展示了如何实现一个光学黑洞激光器，即一个放大器形成的旅行折射率扰动安排，以便捕获之间的白色和黑洞地平线的光。模拟突出了这些激光器的主要特点：腔体内的正和负频率模式的增长伴随着较弱的发射模式，发生在周期性的突发对应于腔往返的捕获模式。然后，我们突出了一个新的制度，在该制度中的陷波模谱加宽，直到零频率点的色散曲线上达到。在视界处的放大对于零频率是最高的，因此导致被捕获的光的结构的强烈修改。对于足够长的传播时间，仅在零频率模式下产生激光。
英文摘要：
Using numerical simulations we show how to realise an optical black hole laser, i.e. an amplifier formed by travelling refractive index perturbations arranged so as to trap light between a white and a black hole horizon. The simulations highlight the main features of these lasers: the growth inside the cavity of positive and negative frequency modes accompanied by a weaker emission of modes that occurs in periodic bursts corresponding to the cavity round trips of the trapped modes. We then highlight a new regime in which the trapped mode spectra broaden until the zero-frequency points on the dispersion curve are reached. Amplification at the horizon is highest for zero-frequencies, therefore leading to a strong modification of the structure of the trapped light. For sufficiently long propagation times, lasing ensues only at the zero-frequency modes.
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