Interfacing transitions of different alkali atoms and telecom bands using one narrowband photon pair source
Interfacing transitions of different alkali atoms and telecom bands using one narrowband photon pair source
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DOI：
10.1364/optica.2.000773
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发表时间：
2015-09-20
期刊：
影响因子：
10.4
通讯作者：
Marquardt, Christoph
中科院分区：
文献类型：
--
作者：
Schunk, Gerhard;Vogl, Ulrich;Marquardt, Christoph
量子信息技术强烈依赖于光子与窄带量子系统的耦合，例如量子点、色心和原子系统。这种耦合需要将光波长和带宽与所需的系统相匹配，这对于大多数可用的量子光源来说是一个相当大的问题。在这里，我们展示了碱金属偶极跃迁与可调谐光子对源的耦合。我们的源是基于三重共振回音壁模式谐振器中的自发参数下转换。为此，我们已经开发了新的波长调谐机制，允许粗调谐到铯或铷的波长，随后连续微调到所需的过渡。作为源的功能的演示，我们进行了预示性的原子衰变的单光子测量。我们在控制自发下转换过程方面取得了重大进展，这使得我们的预示单光子的明亮源现在与过多的窄带共振系统兼容。(C)2015美国光学学会
Quantum information technology strongly relies on the coupling of optical photons with narrowband quantum systems, such as quantum dots, color centers, and atomic systems. This coupling requires matching the optical wavelength and bandwidth to the desired system, which presents a considerable problem for most available sources of quantum light. Here we demonstrate the coupling of alkali dipole transitions with a tunable source of photon pairs. Our source is based on spontaneous parametric downconversion in a triply resonant whispering gallery mode resonator. For this, we have developed novel wavelength-tuning mechanisms that allow a coarse tuning to either the cesium or rubidium wavelength, with subsequent continuous fine-tuning to the desired transition. As a demonstration of the functionality of the source, we performed a heralded single-photon measurement of the atomic decay. We present a major advance in controlling the spontaneous downconversion process, which makes our bright source of heralded single photons now compatible with a plethora of narrowband resonant systems. (C) 2015 Optical Society of America