基于电磁诱导透明效应的铯50D里德伯态极化率测量

Measurement of the Polarization Rate of Cesium 50D Rydberg State Based on Electromagnetic Induced Transparency Effect

原子极化率反映了原子体系对外场的响应程度。里德伯原子具有非常大的极化率,使得里德伯原子在量子态的外场操控以及微波场强测量方面具有很大的应用前景。极化率的测量准确度将为外场的精密测量奠定理论基础。本文利用电磁诱导透明技术,实现了铯50D里德伯态原子极化率的测量。实验中基于阶梯型电磁诱导透明光谱,首先测量了铯原子50D态的AC-Stark效应,并研究了原子能级光谱分裂间隔与场强的关系,推算得到了张量极化率与标量极化率的实验测量值。其实验测量值与计算值进行对比,两者基本吻合。里德伯态极化率的测量研究为电场对能级的调控以及对射频场电场强度的精密测量提供了保障。

The atomic polarizability reflects the degree of response of the atomic system to the external field.The Rydberg atom has a very large polarizability,which makes the Rydberg atom have great application prospects in the external field manipulation of quantum states and the measurement of microwave field strength.The measurement accuracy of polarizability will lay a theoretical foundation for the precise measurement of the external field.In this paper,the measurement of atomic polarizability in the Rydberg state of cesium 50D is realized by using the electromagnetically induced transparency technique.In the experiment,based on the stepped electromagnetically induced transparency spectrum,the AC-Stark effect of the 50D state of the cesium atom was first measured,and the relationship between the spectral splitting interval of the atomic energy level and the field strength was studied,and the tensor polarizability and scalar polarizability were calculated.experimental measurements.The experimentally measured values are compared with the calculated values,and the two are basically consistent.The measurement of the Rydberg state polarizability provides a guarantee for the regulation of the energy level by the electric field and the precise measurement of the electric field strength of the radio frequency field.