论文标题
液态氦气上表面电子激发的rydberg状态的放松
Relaxation of the Excited Rydberg States of Surface Electrons on Liquid Helium
论文作者
论文摘要
我们报告了被困在液态氦表面上的电子中激发态种群衰减的第一个直接观察。由系统中的非弹性散射过程控制的弛豫动力学是通过电子对脉冲微波激发的实时响应来探测的。与理论计算的比较使我们能够在不同温度下建立非弹性散射的主要机制。最长测量的弛豫时间约为1 US，在135 MK的最低温度下，这取决于自发的两涡旋发射过程引起的非弹性散射。此外，应用微波辐射后不久，由于系统的多频带结构，图像充电响应揭示了有趣的种群动态。
We report the first direct observation of the decay of the excited-state population in electrons trapped on the surface of liquid helium. The relaxation dynamics, which are governed by inelastic scattering processes in the system, are probed by the real-time response of the electrons to a pulsed microwave excitation. Comparison with theoretical calculations allows us to establish the dominant mechanisms of inelastic scattering for different temperatures. The longest measured relaxation time is around 1 us at the lowest temperature of 135 mK, which is determined by the inelastic scattering due to the spontaneous two-ripplon emission process. Furthermore, the image-charge response shortly after applying microwave radiation reveals interesting population dynamics due to the multisubband structure of the system.
