Superradiance from lattice-confined atoms inside hollow core fibre

Okaba, Shoichi; Yu, Deshui; Vincetti, Luca; Benabid, Fetah; Katori, Hidetoshi

doi:10.1038/s42005-019-0237-2

Cited by 31 publications

(11 citation statements)

References 48 publications

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“…There, the theoretical description becomes increasingly complex due to the exponential scaling of the system's Hilbert space with the number of emitters [19][20][21][22][23][24][25]. Recently, nanofiber-based atom-light interfaces have opened a new experimental avenue for studying collective radiative dynamics with waveguide-coupled atoms [26][27][28][29][30][31][32][33]. There, all emitters couple efficiently to the guided optical mode, and propagation-direction-dependent coupling can be implemented, providing access to the field of chiral quantum optics [34].…”

mentioning

confidence: 99%

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Liedl¹,

Pucher²,

Tebbenjohanns³

et al. 2022

Preprint

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The collective absorption and emission of light by an ensemble of atoms is at the heart of many fundamental quantum optical effects and the basis for numerous applications. However, beyond weak excitation, both experiment and theory become increasingly challenging. Here, we explore the regimes from weak excitation to inversion with ensembles of up to one thousand atoms that are trapped and optically interfaced using the evanescent field surrounding an optical nanofiber. We realize strong inversion, with about 80 % of the atoms being excited, and study their subsequent radiative decay into the guided modes. The data is very well described by a simple model that assumes a cascaded interaction of the guided light with the atoms. Our results contribute to the fundamental understanding of the collective interaction of light and matter and are relevant for applications ranging from quantum memories to sources of nonclassical light to optical frequency standards.

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mentioning

confidence: 99%

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Liedl¹,

Pucher²,

Tebbenjohanns³

et al. 2022

Preprint

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“…Among the application opportunities, which encompass, for example, the development of novel optical sources and atom optics experiments [8][9][10], the field of optical sensors acquires a prominent position within HCPCF technology due to the broad set of parameters that can be potentially monitored [11]. HCPCFs have been demonstrated, for example, to be a promising platform for probing concentrations of chemical species in gaseous and liquid samples [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Angle-Resolved Hollow-Core Fiber-Based Curvature Sensing Approach

Guimarães¹,

Cordeiro

Franco³

et al. 2021

Fibers

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We propose and theoretically study a new hollow-core fiber-based curvature sensing approach with the capability of detecting both curvature radius and angle. The new sensing method relies on a tubular-lattice fiber that encompasses, in its microstructure, tubes with three different thicknesses. By adequately choosing the placement of the tubes within the fiber cross-section, and by exploring the spectral shifts of the fiber transmitted spectrum due to the curvature-induced mode field distributions’ displacements, we demonstrate a multi-axis curvature sensing method. In the proposed platform, curvature radii and angles are retrieved via a suitable calibration routine, which is based on conveniently adjusting empirical functions to the fiber response. Evaluation of the sensing method performance for selected cases allowed the curvature radii and angles to be determined with percentual errors of less than 7%. The approach proposed herein provides a promising path for the accomplishment of new curvature sensors able to resolve both the curvature radius and angle.

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“…Moreover, by designing multiple low-loss transmission bands in the fiber, Rydberg atoms are excited by 780 nm and 480 nm light, which are simultaneously guided through the fiber [10]. On the fundamental physics side, the collective emission of light from an atomic ensemble has also been observed and studied in the fibers [11,12], and could potentially be used to study the long-range interactions of neutral atoms. Despite the above experimental progress and a preliminary study of atom loading [13][14][15][16][17], a detailed understanding of the dynamics under different loading parameters would facilitate the design of cold atom experiments in the fibers.…”

Section: Introductionmentioning

confidence: 99%

Loading Dynamics of Cold Atoms into a Hollow-Core Photonic Crystal Fiber

Wang

Chai

Xin

et al. 2020

Fibers

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Cold atoms trapped and guided in hollow-core photonic crystal fibers provide a scalable diffraction-free setting for atom–light interactions for quantum technologies. However, due to the mismatch of the depth and spatial extension of the trapping potential from free space to the fiber, the number of cold atoms in the fiber is mainly determined by the loading process from free space to waveguide confinement. Here, we provide a numerical study of the loading dynamics of cold atoms into a hollow-core photonic crystal fiber. We use the Monte Carlo method to simulate the trajectories of an ensemble of cold atoms from free space trapping potential to optical potential inside a hollow-core fiber and calculate the temperature, loading efficiency, and geometry of the ensemble. We also study the noise sources that cause heating and a loss of atoms during the process. Our result could be used to design and optimize the loading process of cold atoms into a hollow-core fiber for cold atom experiments.

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Superradiance from lattice-confined atoms inside hollow core fibre

Cited by 31 publications

References 48 publications

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Angle-Resolved Hollow-Core Fiber-Based Curvature Sensing Approach

Loading Dynamics of Cold Atoms into a Hollow-Core Photonic Crystal Fiber

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