Keloth Jameesh, Nayak K P, Hakuta K
Opt Lett. 2017 Mar 1;42(5):1003-1006. doi: 10.1364/OL.42.001003.
We report the fabrication of a 1.2 cm long cavity directly on a nanofiber using femtosecond laser ablation. The cavity modes with finesse values in the range of 200-400 can enable the "strong-coupling" regime of cavity QED, with high cooperativity of 10-20, for a single atom trapped 200 nm away from the fiber surface [Phys. Rev. A80, 053826 (2009)PLRAAN1050-294710.1103/PhysRevA.80.053826]. Such cavity modes can still maintain the transmission between 40%-60%, suggesting a one-pass intracavity transmission of 99.53%. Other cavity modes, which can enable cooperativity in the range of 3-10, show transmission over 60%-85% and are suitable for fiber-based single-photon sources and quantum nonlinear optics in the "Purcell" regime.
我们报道了利用飞秒激光烧蚀在纳米纤维上直接制备出一个1.2厘米长的腔。对于一个被捕获在距离纤维表面200纳米处的单个原子，精细度值在200 - 400范围内的腔模能够实现腔量子电动力学的“强耦合” regime，其具有10 - 20的高协同性[《物理评论A》80, 053826 (2009)PLRAAN1050 - 294710.1103/PhysRevA.80.053826]。这样的腔模仍能保持40% - 60%的透射率，这表明单程腔内透射率为99.53%。其他能使协同性在3 - 10范围内的腔模，其透射率超过60% - 85%，适用于“珀塞尔” regime下基于纤维的单光子源和量子非线性光学。
