Quantum Light from a Whispering-Gallery-Mode Disk Resonator
Quantum Light from a Whispering-Gallery-Mode Disk Resonator
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DOI：
10.1103/physrevlett.106.113901
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发表时间：
2011-03-15
影响因子：
8.6
通讯作者：
Leuchs, G.
中科院分区：
文献类型：
--
作者：
Fuerst, J. U.;Strekalov, D. V.;Leuchs, G.
光学参量下转换已被证明是一种有价值的非经典光源。当泵浦远高于阈值时，该过程固有地能够产生双光束相关沿着任一参量光束的单独强度压缩。在这里，我们提出了第一次直接观察到的强度压缩的每一个单独的参量光束在参量下转换的-1.2 dB的使用一个高品质的回音壁模式盘谐振器。此外，我们观察到的双光束量子相关的-2.7分贝与此腔。这样的谐振器具有强的光学限制，并提供可调谐耦合到外部光场。这项工作证实了晶体回音壁模式谐振器产生量子光的潜力。这种设备的简单性使得量子光在各个领域的应用变得非常可行。
Optical parametric down-conversion has proven to be a valuable source of nonclassical light. The process is inherently able to produce twin-beam correlations along with individual intensity squeezing of either parametric beam, when pumped far above threshold. Here, we present for the first time the direct observation of intensity squeezing of -1.2 dB of each of the individual parametric beams in parametric down-conversion by use of a high quality whispering-gallery-mode disk resonator. In addition, we observed twin-beam quantum correlations of -2.7 dB with this cavity. Such resonators feature strong optical confinement and offer tunable coupling to an external optical field. This work exemplifies the potential of crystalline whispering-gallery-mode resonators for the generation of quantum light. The simplicity of this device makes the application of quantum light in various fields highly feasible.