Relaxation of the Excited Rydberg States of Surface Electrons on Liquid Helium
Relaxation of the Excited Rydberg States of Surface Electrons on Liquid Helium
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液氦上表面电子激发里德伯态的弛豫
DOI：
10.1103/physrevlett.126.106802
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发表时间：
2021
影响因子：
8.6
通讯作者：
Konstantinov Denis
中科院分区：
文献类型：
--
作者：
Kawakami Erika;Elarabi Asem;Konstantinov Denis
我们报告的第一个直接观察到的激发态人口的衰减被困在液氦表面的电子。弛豫动力学，这是由系统中的非弹性散射过程，探测的实时响应的电子脉冲微波激发。与理论计算的比较，使我们能够建立不同温度下的非弹性散射的主导机制。最长的弛豫时间约在最低温度135 mK处，这是由自发双ripplon发射过程引起的非弹性散射决定的。此外，图像电荷响应后不久，应用微波辐射揭示了有趣的人口动态由于多子带结构的系统。
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 aroundat 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.