Cavity induced transparency
Cavity induced transparency
复制标题
DOI：
10.1016/0030-4018(96)00102-2
复制
发表时间：
1996-05-15
影响因子：
2.4
通讯作者：
Brecha, RJ
中科院分区：
文献类型：
--
作者：
Rice, PR;Brecha, RJ
我们考虑空腔内的两能级原子。我们发现原子的吸收光谱对于弱探针可能会在线中心出现一个空洞。当腔线宽与原子场耦合强度相比较小时，就会出现该孔，而原子场耦合强度本身又小于原子的自由空间线宽。在弱场极限下，该系统类似于三能级原子，由于电磁感应透明（EIT），在线中心出现类似的吸收空穴。在EIT中，需要一个强场来强烈混合上面的两个能级，而在我们考虑的系统中，发挥这一作用的是原子场耦合强度。给出了腔场和原子极化之间的干涉的另一种解释。我们还检查了从动腔情况。
We consider a two-level atom inside a cavity. We find that the absorption spectrum of the atom may exhibit a hole at line center for a weak probe. This hole appears when the cavity linewidth is small compared to the atom-field coupling strength, which is itself smaller than the atom's free space linewidth. In the weak-field limit, this system is analogous to a three-level atom, where similar absorption holes at line center occur due to electromagnetically induced transparency (EIT). In EIT, a strong field is required to strongly mix the upper two levels, whereas in the system we consider, it is the atom-field coupling strength that plays this role. An alternate explanation in terms of interference between the cavity field and atomic polarization is given. We also examine the driven cavity case.