Rydberg atoms in confined geometries - Experiment and Theory

受限几何结构中的里德伯原子 - 实验与理论

• 批准号: 252404023
• 负责人: Dr. Robert Löw
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/252404023?language=en
• 关键词: Rydberg; atoms; confined; geometries; Experiment

The control over the internal and external degrees of atoms has reached a level of precision that allows for technical applications superior to solid state devices. The most prominent example is the cesium atom clock, which sets the time reference for the entire planet. In combination with the definition of the speed of light it is also the origin of the meter; thus the measurement of space and time is based on controlling atoms. Atoms can further serve as sensitive probes for magnetic, electric and electromagnetic fields, gravitation, acceleration and rotation. When adding the capability of atomic gases to generate, delay, store and modify light fields, it becomes evident that many more atom-based devices are set to enter our everyday life. A landmark is set by the chip scale atomic clock (CSAC) by Symmetricom, in which all components have been miniaturized to make it integrable and compatible with current technologies present in industry. However, miniaturization can sometimes also be a burden, given that much closer confining walls are more likely to interact with the atoms in an unwanted way.The scientific questions to be answered in this proposal are on the one hand how to minimise the coupling of atoms to a nearby surface, and on the other hand the active use of the surface to mediate interactions between (Rydberg) atoms. The main topic to be addressed here are the interactions of cesium atoms with dielectric materials. The level of optical excitation of the atoms will cover low-lying states as well as highly excited Rydberg states. The experiments will work with thermal atoms at room temperature. Our choice of dielectric materials is mainly driven by device applications. We are mostly interested in quartz glass, which is the standard material for vapour cells. An especially important material for our investigations is diamond, as the absence of optical excitations in the infrared and far-infrared meets the needs of Rydberg atoms, which exhibit strong dipole transitions in this range of wavelengths.In a further processing step we can alter the spectra of excitations in the solid by tailoring material properties such as material thickness, arrangement of layers etc. to either suppress or enhance the atom-wall coupling. The latter might be beneficial for all effects relying on optical saturation by increasing the light scattering rate where the absence or at least the accurate knowledge of the coupling is desirable for most sensing applications.The proposal brings together two groups at the Universities of Stuttgart and Rostock with world-leading expertise in experimental Rydberg physics (Stuttgart) and theoretical atom-surface physics (Rostock). The combined effort promises to yield new insights into coherent manipulation of atoms in confined geometries.

对原子内部和外部程度的控制已经达到了精确的水平，允许技术应用上级固态设备。最突出的例子是铯原子钟，它为整个地球设定时间基准。结合光速的定义，它也是米的起源;因此，空间和时间的测量是基于控制原子。原子还可以作为磁场、电场和电磁场、引力、加速度和旋转的敏感探针。当增加原子气体产生、延迟、存储和修改光场的能力时，很明显，更多基于原子的设备将进入我们的日常生活。Symmetricom的芯片级原子钟（CSAC）是一个里程碑，其中所有组件都已小型化，使其可集成并与当前工业中的技术兼容。然而，小型化有时也会成为一种负担，因为更近的限制壁更有可能以不必要的方式与原子相互作用。这个提议要回答的科学问题一方面是如何最大限度地减少原子与附近表面的耦合，另一方面是积极利用表面来调解（里德伯）原子之间的相互作用。这里要解决的主要问题是铯原子与电介质材料的相互作用。原子的光激发水平将覆盖低激发态以及高激发里德堡态。这些实验将在室温下用热原子进行。我们对介电材料的选择主要取决于器件应用。我们主要对石英玻璃感兴趣，这是蒸汽电池的标准材料。对于我们的研究来说，一个特别重要的材料是金刚石，因为在红外和远红外中没有光学激发满足了里德堡原子的需要，里德堡原子在这个波长范围内表现出强的偶极跃迁。在进一步的处理步骤中，我们可以通过定制材料特性，如材料厚度，层的布置等以抑制或增强原子-壁耦合。后者可能是有益的所有依赖于光饱和的影响，通过增加光散射率的情况下，或至少耦合的准确知识是大多数传感application.The建议汇集了两个小组在斯图加特大学和罗斯托克与世界领先的专业知识，在实验里德伯物理（斯图加特）和理论原子表面物理（罗斯托克）。这一综合努力有望产生新的见解，在有限的几何形状中对原子进行相干操纵。

项目成果

Coupling thermal atomic vapor to an integrated ring resonator

• DOI: 10.1088/1367-2630/18/10/103031
• 发表时间: 2016-10-21
• 期刊: NEW JOURNAL OF PHYSICS
• 影响因子: 3.3
• 作者: Ritter, R.;Gruhler, N.;Loew, R.
• 通讯作者: Loew, R.

Atomic vapor spectroscopy in integrated photonic structures

• DOI: 10.1063/1.4927172
• 发表时间: 2015-07-27
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Ritter, Ralf;Gruhler, Nico;Loew, Robert
• 通讯作者: Loew, Robert

Coupling Thermal Atomic Vapor to Slot Waveguides

• DOI: 10.1103/physrevx.8.021032
• 发表时间: 2018-05
• 期刊: Physical Review X
• 影响因子: 12.5
• 作者: R. Ritter;N. Gruhler;Helge Dobbertin;H. Kübler;S. Scheel;W. Pernice;T. Pfau;R. Löw