Department of Applied Physics, The Benin School of Engineering and Computer Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Nat Commun. 2017 Feb 9;8:14461. doi: 10.1038/ncomms14461.
In recent years, there has been marked increase in research aimed to introduce alkali vapours into guided-wave configurations. Owing to the significant reduction in device dimensions, the increase in density of states, the interaction with surfaces and primarily the high intensities carried along the structure, a plethora of light-vapour interactions can be studied. Moreover, such platform may exhibit new functionalities such as low-power nonlinear light-matter interactions. One immense challenge is to study the effects of quantum coherence and shifts in nanoscale waveguides, characterized by ultra-small mode areas and fast dynamics. Here, we construct a highly compact 17 mm long serpentine silicon-nitride atomic vapour cladding waveguide. Fascinating and important phenomena such as van-der-Waals shifts, dynamical stark shifts and coherent effects such as strong coupling (in the form of Autler-Townes splitting) are observed. Some of these effects may play an important role in applications such as all-optical switching, frequency referencing and magnetometry.
近年来，人们致力于将碱蒸气引入导波结构的研究显著增加。由于器件尺寸显著减小、态密度增加、与表面的相互作用以及结构中携带的高强度，大量的光-蒸气相互作用可以被研究。此外，这种平台可能表现出新的功能，如低功率非线性光物质相互作用。一个巨大的挑战是研究量子相干和纳米尺度波导中的位移的影响，其特点是超小模式区域和快速动力学。在这里，我们构建了一个高度紧凑的 17 毫米长的硅氮化物原子蒸气包层波导。观察到了范德瓦尔斯位移、动态斯塔克位移和相干效应（如强耦合（以 Autler-Townes 分裂的形式）等有趣而重要的现象。这些效应中的一些可能在全光开关、频率参考和磁强计等应用中发挥重要作用。
