将单光子高效导入光学纳米毛细管光纤导模
Highly efficient channeling of single photons into guided modes of optical nanocapillary fibers
AI总结：
本文数值优化充水NCF的内外径及SDS位置，实现单光子向导模52%的高效导入，可为量子技术与生物传感提供新平台。
摘要：
我们通过数值研究报道了将单个量子发射体发出的单光子高效导入光学纳米毛细管光纤（NCF）导模的方法。NCF由具有内径和外径的液芯光学纳米光纤构成。我们通过在充有水介质的NCF内部放置单个偶极子源（SDS），对其内径和外径进行优化。当径向偏振的SDS置于充有水介质的NCF中心时，获得了52%的最大导入效率。对于620 nm的发射波长，NCF的最佳内径和外径分别为100 nm和360 nm。此外，考虑到在NCF内部放置单个量子发射体时存在实验不确定性，我们研究了SDS在NCF内部的位置依赖性。结果发现，在最佳条件下，水介质中的导入效率几乎保持恒定。该平台可能为量子技术中的单光子产生以及生物传感中的单细胞检测开辟一条新途径。
英文摘要：
We report numerically the efficient channeling of single photons from a single quantum emitter into guided modes of optical nanocapillary fibers (NCFs). The NCF is formed of a liquid core optical nanofiber with inner and outer diameters. We optimize the inner and outer diameters of the NCF filled with water medium by placing a single dipole source (SDS) inside. The maximum channeling efficiency of 52% is found when the radially polarized SDS is placed at the center of the NCF filled with the water medium. The optimum inner and outer diameters of the NCF are 100 nm and 360 nm for the emission wavelength of 620 nm, respectively. Additionally, we investigate the SDS position dependence inside the NCF considering experimental ambiguity in placing a single quantum emitter inside the NCF. We found that the channeling efficiency remains almost constant for the water medium at the optimum condition. The present platform may open a novel route for generating single photons in quantum technologies and detecting single cells in bio-sensing.
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