Self ordering threshold and superradiant backscattering to slow a fast gas beam in a ring cavity with counter propagating pump.
Self ordering threshold and superradiant backscattering to slow a fast gas beam in a ring cavity with counter propagating pump.
复制标题
自排序阈值和超辐射反向散射可在具有反向传播泵的环腔中减慢快速气体束。
作者：
C. Maes;J. Asbóth;H. Ritsch
本文研究了高速气体光束在高Q环腔计数器中传播任何粒子光学共振产生的大失谐强泵浦激光的动力学。由于自发辐射被强烈抑制，粒子可以被视为极化点质量，形成一个动态移动的镜子。在阈值强度以上，粒子表现出空间周期有序，增强了光束减速的集体相干后向散射。基于加速静止坐标系下的线性稳定性分析，我们导出了这种自组织的强度阈值的解析界，它是粒子数、平均速度、动力学温度、泵浦失谐和谐振腔线宽的函数。分析结果与含场阻尼和自发发射噪声的n粒子运动随时间变化的模拟结果一致。我们的结果提供了可以很容易地评估停止和冷却快速分子束的条件。
We study the dynamics of a fast gaseous beam in a high Q ring cavity counter propagating a strong pump laser with large detuning from any particle optical resonance. As spontaneous emission is strongly suppressed the particles can be treated as polarizable point masses forming a dynamic moving mirror. Above a threshold intensity the particles exhibit spatial periodic ordering enhancing collective coherent backscattering which decelerates the beam. Based on a linear stability analysis in their accelerated rest frame we derive analytic bounds for the intensity threshold of this selforganization as a function of particle number, average velocity, kinetic temperature, pump detuning and resonator linewidth. The analytical results agree well with time dependent simulations of the N-particle motion including field damping and spontaneous emission noise. Our results give conditions which may be easily evaluated for stopping and cooling a fast molecular beam.
影响因子：
19.6
作者：
R. Fulton;A. Bishop;M. Shneider;P. Barker
通讯作者：
R. Fulton;A. Bishop;M. Shneider;P. Barker