Li Wenfang, Du Jinjin, Nic Chormaic Síle
Opt Lett. 2018 Apr 15;43(8):1674-1677. doi: 10.1364/OL.43.001674.
We present a novel approach to enhance the spontaneous emission rate of single quantum emitters in an optical nanofiber-based cavity by introducing a narrow air-filled groove into the cavity. Our results show that the Purcell factor for single quantum emitters inside the groove of the nanofiber-based cavity can be at least six times greater than for such an emitter on the fiber surface when using an optimized cavity mode and groove width. Moreover, the coupling efficiency of single quantum emitters into the guided mode of this nanofiber-based cavity can reach up to ∼80% with only 35 cavity-grating periods. This new system has the potential to act as an all-fiber platform to realize efficient coupling of photons from single emitters into an optical fiber for quantum information applications.
我们提出了一种新颖的方法，通过在基于光学纳米纤维的腔中引入一个狭窄的充气凹槽来提高单量子发射器的自发发射率。我们的结果表明，当使用优化的腔模和凹槽宽度时，基于纳米纤维的腔的凹槽内的单量子发射器的珀塞尔因子比光纤表面上的此类发射器的珀塞尔因子至少大六倍。此外，仅需35个腔光栅周期，单量子发射器与这种基于纳米纤维的腔的导模的耦合效率就可以达到约80%。这个新系统有潜力作为一个全光纤平台，实现将来自单发射器的光子有效地耦合到光纤中，用于量子信息应用。
