Superradiance from Lattice-Confined Atoms inside Hollow Core Fibre

Abstract

Unravelling superradiance, also known as superfluorescence, relies on an ensemble of phase-matched dipole oscillators and the suppression of inhomogeneous broadening. Here we report on a novel superradiance platform that combines an optical lattice free from the ac Stark shift and a hollow-core photonic crystal fibre, enabling an extended atom-light interaction over $2\mathrm{mm}$ free from the Doppler effect. This system allows controlling the atom spatial distribution and spectral homogeneity whilst efficiently coupling the radiation field to an optical fibre. The experimentally-observed and theoretically-corroborated temporal, spectral and spatial dynamic behaviours of the superradiance, e.g., superradiance ringing and density-dependent frequency shift, demonstrate a unique interplay between the trapped atoms and the fibre-guided field with multiple transverse modes. Our theory indicates the resulting temporal evolution of the guided light shows a minimal beam radius of $3.1\mu \mathrm{m}$ that is three times smaller than that of the lowest-loss fibre mode.

41 pages, 8 figures in total, the first 30 pages and 6 figures are main article and the remaining pages and figures are supplemental material

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Cited by in corpus (15)

• Collective radiative dynamics of an ensemble of cold atoms coupled to an optical waveguide
• Observation of superradiant bursts in a cascaded quantum system
• Classification of Exceptional Nodal Topologies Protected by $\mathcal{P}\mathcal{T}$ Symmetry
• Subradiance with saturated atoms: population enhancement of the long-lived states
• Cavity Sub- and Superradiance Enhanced Ramsey Spectroscopy
• Full characterization of few-cycle superradiant pulses generated from a free-electron laser oscillator
• Loading and spatially-resolved characterization of a cold atomic ensemble inside a hollow-core fiber
• Optical interpretation of linear-optics superradiance and subradiance
• Subradiance and Superradiant Long Range Excitation Transport among Quantum Emitter Ensembles in a Waveguide
• Stimulated Raman Scattering and Molecular Modulation in Anti-resonant Hollow-core Fibres
• Superradiant phase transition in a large interacting driven atomic ensemble in free space
• Ramsey-Borde atom interferometry with a thermal strontium beam for a compact optical clock
• $N$ Scaling of Large-Sample Collective Decay in Inhomogeneous Ensembles
• Excitation transfer and many-body dark states in waveguide quantum electrodynamics
• Observation of coherent coupling between super- and subradiant states of an ensemble of cold atoms collectively coupled to a single propagating optical mode