Efficient fiber in-line single photon source based on colloidal single quantum dots on an optical nanofiber
| Autor: | K. Muhammed Shafi, Akiharu Miyanaga, Kohzo Hakuta, Kali P. Nayak |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Photon Physics and Astronomy (miscellaneous) Atomic Physics (physics.atom-ph) General Physics and Astronomy Physics::Optics FOS: Physical sciences Applied Physics (physics.app-ph) 01 natural sciences Physics - Atomic Physics 010309 optics 0103 physical sciences 010306 general physics Astrophysics::Galaxy Astrophysics Quantum optics Quantum Physics Quantum network business.industry General Engineering Single-mode optical fiber Physics - Applied Physics Quantum dot Single-photon source Optoelectronics Quantum efficiency High Energy Physics::Experiment Trion business Quantum Physics (quant-ph) Physics - Optics Optics (physics.optics) |
| DOI: | 10.48550/arxiv.2003.06117 |
| Popis: | We demonstrate a fiber in-line single photon source based on a hybrid system of colloidal single quantum dots deposited on an optical nanofiber and cooled down to cryogenic temperature (3.7 K). We show that a charged state (trion) of the single quantum dot exhibits a photo-stable emission of single photons with high quantum efficiency, narrow linewidth (3 meV FWHM) and fast decay time ($$10.0\pm 0.5$$ ns). The single photons are efficiently coupled to the guided modes of the nanofiber and eventually to a single mode optical fiber. The brightness (efficiency) of the single photon source is estimated to be $$16\pm 2\%$$ with a maximum photon count rate of $$1.6\pm \,0.2$$ MHz and a high single photon purity ($$g^2(0)=0.11\pm 0.02$$). The device can be easily integrated to the fiber networks paving the way for potential applications in quantum networks. |
| Databáze: | OpenAIRE |
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