基于调控原子相干的Λ-型电磁感应透明与吸收  

Λ-type electromagnetically induced transparency and absorption by controlling atomic coherence

作　　者：裴丽娅 郑世阳 牛金艳[2] Pei Li-Ya;Zheng Shi-Yang;Niu Jin-Yan(College of Mathematics and Physics,Beijing University of Chemical Technology,Beijing 100029,China;College of Science,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]北京化工大学数理学院,北京100029 [2]内蒙古科技大学理学院,包头014010

出　　处：《物理学报》2022年第22期110-116,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11404330)资助的课题。

摘　　要：在Λ-型电磁感应透明系统中,随着弱探测光场逐渐增强,多普勒展宽线性吸收背景之上呈现的单个窄线宽窗口演化成了相互间隔出现的3个窗口与2个吸收增强峰.本文利用缀饰态模型对探测光强度的作用机制进行了详细的研究.提出当探测光场不再足够弱时,通过光强可以调控原子Raman相干;对于多普勒增宽系统,将使得缀饰态能量变化不连续以及因缀饰态双共振产生极大Raman损耗,这是透明窗口演化的关键因素.In a Λ-type electromagnetically induced transparency system, it shows that on the Doppler-broadened linear absorption background, as the probe intensity increases, the single narrow line-width window gradually evolves into 3 windows and 2 absorption peaks alternately. In this paper, the mechanism of probe intensity is studied in detail by using the dressed-state model. We propose that when the probe field is not so weak, the atomic Raman coherence can be manipulated by its intensity. For a Doppler-broadened system, there will appear the discontinuous energy variation of the dressed-states, and the large Raman loss due to the double resonance for dressed-states, which are the key factors for the evolution of the transparency window.

关 键 词：电磁感应透明 电磁感应吸收 原子相干 极化干涉 缀饰态 

分 类 号：O441.3[理学—电磁学]