Efficient Single-Mode Photon-Coupling Device Utilizing a Nanofiber Tip

Sho Chonan, Shinya Kato, Takao Aoki*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


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.

Original languageEnglish
Article number4785
JournalScientific reports
Publication statusPublished - 2014 Apr 24

ASJC Scopus subject areas

  • General


Dive into the research topics of 'Efficient Single-Mode Photon-Coupling Device Utilizing a Nanofiber Tip'. Together they form a unique fingerprint.

Cite this