Multi-level cascaded electromagnetically induced transparency in cold atoms using an optical nanofibre interface

Abstract

Ultrathin optical fibres integrated into cold atom setups are proving to be ideal building blocks for atom-photon hybrid quantum networks. Such optical nanofibres (ONF) can be used for the demonstration of nonlinear optics and quantum interference phenomena in atomic media. Here, we report on the observation of multilevel cascaded electromagnetically induced transparency (EIT) using an optical nanofibre to interface cold ${}^{87}$Rb atoms through the intense evanescent fields that can be achieved at ultralow probe and coupling powers. Both the probe (at 780 nm) and the coupling (at 776 nm) beams propagate through the nanofibre. The observed multipeak transparency spectra of the probe beam could offer a method for simultaneously slowing down multiple wavelengths in an optical nanofibre or for generating ONF-guided entangled beams, showing the potential of such an atom-nanofibre system for quantum information. We also demonstrate all-optical-switching in the all fibred system using the obtained EIT effect.

11 pages, 6 figures

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Cited by in corpus (11)

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• Optical nanofiber-based cavity induced by periodic air-nanohole arrays
• Fabrication of Optical Nanofibre-Based Cavities using Focussed Ion-Beam Milling -- A Review
• Evanescent field trapping of nanoparticles using nanostructured ultrathin optical fibers
• Near-field measurement of modal interference in optical nanofibers for sub-Angstrom radius sensitivity
• Complete polarization control for a nanofiber waveguide using directional coupling
• Alignment-dependent decay rate of an atomic dipole near an optical nanofiber
• Optomechanics with a position-modulated Kerr-type nonlinear coupling
• Spin selection rule for {\it S} level transitions in atomic rubidium under paraxial and nonparaxial two-photon excitation
• Rubidium atom spectral lineshapes in high intensity electric fields near an optical nanofibre