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Efficient Single-Mode Photon-Coupling Device Utilizing a Nanofiber Tip
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DOI：10.1038/srep04785.png)
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摘要
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Single-photon sources are important elements in quantum optics and quantum information science. It is crucial that such sources be able to couple photons emitted from a single quantum emitter to a single propagating mode, preferably to the guided mode of a single-mode optical fiber, with high efficiency. Various photonic devices have been successfully demonstrated to efficiently couple photons from an emitter to a single mode of a cavity or a waveguide. However, efficient coupling of these devices to optical fibers is sometimes challenging. Here we show that up to 38% of photons from an emitter can be directly coupled to a single-mode optical fiber by utilizing the flat tip of a silica nanofiber. With the aid of a metallic mirror, the efficiency can be increased to 76%. The use of a silicon waveguide further increases the efficiency to 87%. This simple device can be applied to various quantum emitters.
Keyword:
QUANTUM-DOT
GENERATION
EMISSION
ATOMS
SPECTROSCOPY
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IF:
3.9
论文数:
28.0W
被引数:
83.5W
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