Efficient fiber in-line single photon source based on colloidal single quantum dots on an optical nanofiber

Abstract

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.

References in corpus (6)

• The Quantum Internet
• Photonic quantum technologies
• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• Cavity QED on a nanofiber using a composite photonic crystal cavity
• Highly efficient coupling of photons from nanoemitters into single-mode optical fibers
• Effect of charging on CdSe/CdS dot-in-rods single-photon emission

Cited by in corpus (6)

• One-sided composite cavity on an optical nanofiber for cavity QED
• Channeling of fluorescence photons from quantum dots into guided modes of an optical nanofiber tip
• Single-photon generation from a neodymium ion in optical fiber at room temperature
• Room-temperature addressing of single rare-earth atoms in optical fiber
• Properties of quantum emitters in different hBN sample types particularly suited for nanophotonic integration
• Repulsive Casimir-Polder potentials of low-lying excited states of a multilevel alkali-metal atom near an optical nanofiber