Spontaneous emission of an atomic dipole near a semi-transparent mirror in free space
Spontaneous emission of an atomic dipole near a semi-transparent mirror in free space
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自由空间中半透明镜附近原子偶极子的自发发射
DOI：
10.1117/12.2554809
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Dawson B
中科院分区：
文献类型：
--
作者：
Dawson B
光学界面附近的原子-场相互作用在量子技术中有着广泛的应用。基于此，本文重新研究了双面半透明镜中原子偶极的自发辐射。首先，我们回顾了半透明镜附近量子化电磁场的主要性质。要做到这一点，我们采用了量子镜像检测器的方法，映射到类似的自由空间的情况下，我们在这里考虑的实验设置。我们强调的电磁场的局部态密度取决于反射率的两侧的镜面。因此，在半透明镜前原子偶极的自发衰变率也取决于两种反射率，这并不奇怪。虽然我们在这里描述的效果只适用于相对较短的原子镜距离，它可以帮助设计新的光子器件。
Atom-field interactions near optical interfaces have a wide range of applications in quantum technology. Motivated by this, this paper revisits the spontaneous emission of atomic dipoles in the presence of a two sided semi-transparent mirror. First we review the main properties of the quantised electromagnetic field near a semitransparent mirror. To do so, we employ a quantum mirror image detector method which maps the experimental setup which we consider here onto analogous free space scenarios. We emphasise that the local density of states of the electromagnetic field depends on the reflection rates of both sides of the mirror surface. Hence it is not surprising that also the spontaneous decay rate of an atomic dipole in front of a semi-transparent mirror depends on both reflectance rates. Although the effect which we describe here only holds for relatively short atom-mirror distances, it can aid the design of novel photonics devices.