Limits and possibilities of refractive index in atomic systems
Limits and possibilities of refractive index in atomic systems
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DOI：
10.1016/j.optcom.2021.127583
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发表时间：
2020-07
影响因子：
2.4
通讯作者：
R. McCutcheon;S. Yelin
中科院分区：
文献类型：
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作者：
R. McCutcheon;S. Yelin
最近，折射率的操纵越来越受到关注。我们考虑的参数和可能性，提高的绝对值限制的线性指数在相干原子系统。首先回顾了两级跃迁-没有和增加相干效应-在固定的原子密度下实际上不允许显着增强的指数，我们讨论了一种可能的方法，使用波混合。这证实了除了介质光学深度/密度之外，可以有效改变可达到的折射率值的唯一参数是所涉及的跃迁的频率。
Manipulation of the refractive index has been of growing interest lately. We consider parameters and possibilities of enhancing the absolute-value limit of the linear index in coherent atomic systems. Starting with a review of how two-level transitions – without and with added coherence effects – do not realistically allow for a significantly enhanced index at fixed atomic density, we discuss a possible way around this using wave mixing. This confirms that the only parameters, besides the medium optical depth/density, that can effectively change the value of the attainable index are the frequencies of the involved transitions.