Measurements on release–recapture of cold 85Rb atoms using an optical nanofibre in a magneto-optical trap

Russell, Laura; Kumar, Ravi; Tiwari, V. B.; Chormaic, Síle Nic

doi:10.1016/j.optcom.2013.07.080

Cited by 25 publications

(27 citation statements)

References 47 publications

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“…Rb atoms were cooled and trapped using a standard magneto-optical trapping technique (for details see [15] though it was for 85 Rb). Base pressure in the vacuum chamber was 2 × 10 −9 mbar and, when a current of 5 A was passed through a Rb dispenser, the pressure rose to 4 × 10 −9 mbar and remained stable during the experiments.…”

Section: Magneto-optical Trapping Of Atoms 87mentioning

confidence: 99%

“…Earlier experiments, such as those reported in [1][2][3][4][5], focussed on (i) the interaction of the light guided in the fundamental fibre mode, HE 11 , with atoms, or (ii) excitation of the HE 11 mode through fluorescence coupling from resonantly excited atoms. While the latter experimental technique provides a means of characterizing the atoms near the surface of the ONF [1,[13][14][15], the former permits scenarios whereby atoms can be trapped around the ONF when far-detuned light is coupled into it [2,3,5]. Such ONFs can be termed as single-mode ONFs (SM-ONFs) since only the fundamental guided mode is supported [16].…”

Section: Introductionmentioning

confidence: 99%

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Interaction of laser-cooled⁸⁷Rb atoms with higher order modes of an optical nanofibre

Kumar

Gokhroo²,

Deasy³

et al. 2015

New J. Phys.

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Optical nanofibres are used to confine light to sub-wavelength regions and are very promising tools for the development of optical fibre-based quantum networks using cold, neutral atoms. To date, experimental studies on atoms near nanofibres have focussed on fundamental fibre mode interactions. In this work, we demonstrate the integration of a few-mode optical nanofibre into a magnetooptical trap for 87 Rb atoms. The nanofibre, with a waist diameter of ∼700 nm, supports both the fundamental and first group of higher order modes (HOMs) and is used for atomic fluorescence and absorption studies. In general, light propagating in higher order fibre modes has a greater evanescent field extension around the waist in comparison with the fundamental mode. By exploiting this behaviour, we demonstrate that the detected signal of fluorescent photons emitted from a cloud of cold atoms centred at the nanofibre waist is larger if HOMs are also included. In particular, the signal from HOMs appears to be about six times larger than that obtained for the fundamental mode. Absorption of on-resonance, HOM probe light by the laser-cooled atoms is also observed. These advances should facilitate the realization of atom trapping schemes based on HOM interference.

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Section: Magneto-optical Trapping Of Atoms 87mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interaction of laser-cooled⁸⁷Rb atoms with higher order modes of an optical nanofibre

Kumar

Gokhroo²,

Deasy³

et al. 2015

New J. Phys.

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“…Evanescent wave devices have been commonly used with atomic systems for the past few decades [1,2], but more recently the integration of optical nanofibres, i.e. optical fibres with dimensions smaller than the wavelength of the guided light [3][4][5], into cold atomic systems [6][7][8] has been the focus of increasing research interest and a comprehensive review of progress is contained in [9]. In particular, it has been shown that optical nanofibres can be used for trapping and manipulating cold atoms.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured optical nanofibres for atom trapping

et al. 2014

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We propose an optical dipole trap for cold, neutral atoms based on the electric field produced from the evanescent fields in a hollow, rectangular slot cut through an optical nanofibre. In particular, we discuss the trap performance in relation to laser-cooled rubidium atoms and show that a far off-resonance, bluedetuned field combined with the attractive surface-atom interaction potential from the dielectric material forms a stable trapping configuration. With the addition of a red-detuned field, we demonstrate how three dimensional confinement of the atoms at a distance of 140-200 nm from the fibre surface within the slot can be accomplished. This scheme facilitates optical coupling between the atoms and the nanofibre that could be exploited for quantum communication schemes using ensembles of laser-cooled atoms. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. New J. Phys. 16 (2014) 053052 M Daly et al New J. Phys. 16 (2014) 053052 M Daly et al 3 New J. Phys. 16 (2014) 053052 M Daly et al 4 New J. Phys. 16 (2014) 053052 M Daly et al New J. Phys. 16 (2014) 053052 M Daly et al 6 Figure 4. Graph of the regions of single-mode and multimode operation for 720 nm wavelength. New J. Phys. 16 (2014) 053052 M Daly et al 9

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“…The method is simultaneously corroborated with the standard free-space collection method. Finally, Russell et al (2013) perform release and recapture with an ONF to measure atomic temperature, as well as diagnose optical misalignment in their MOT setups.…”

Section: Atom-cloud Characteristicsmentioning

confidence: 99%

Optical Nanofibers

Solano

Grover

Hoffman

et al. 2017

Advances in Atomic, Molecular, and Optical Physics

100

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The development of optical nanofibers (ONF) and the study and control of their optical properties when coupling atoms to their electromagnetic modes has opened new possibilities for their use in quantum optics and quantum information science. These ONFs offer tight optical mode confinement (less than the wavelength of light) and diffraction-free propagation. The small cross section of the transverse field allows probing of linear and non-linear spectroscopic features of atoms with exquisitely low power. The cooperativity -the figure of merit in many quantum optics and quantum information systems -tends to be large even for a single atom in the mode of an ONF, as it is proportional to the ratio of the atomic cross section to the electromagnetic mode cross section. ONFs offer a natural bus for information and for inter-atomic coupling through the tightly-confined modes, which opens the possibility of one-dimensional many-body physics and interesting quantum interconnection applications. The presence of the ONF modifies the vacuum field, affecting the spontaneous emission rates of atoms in its vicinity. The high gradients in the radial intensity naturally provide the potential for trapping atoms around the ONF, allowing the creation of onedimensional arrays of atoms. The same radial gradient in the transverse direction of the field is responsible for the existence of a large longitudinal component that introduces the possibility of spin-orbit coupling of the light and the atom, enabling the exploration of chiral quantum optics.

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Measurements on release–recapture of cold 85Rb atoms using an optical nanofibre in a magneto-optical trap

Cited by 25 publications

References 47 publications

Interaction of laser-cooled⁸⁷Rb atoms with higher order modes of an optical nanofibre

Interaction of laser-cooled⁸⁷Rb atoms with higher order modes of an optical nanofibre

Nanostructured optical nanofibres for atom trapping

Optical Nanofibers

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Measurements on release–recapture of cold 85Rb atoms using an optical nanofibre in a magneto-optical trap

Cited by 25 publications

References 47 publications

Interaction of laser-cooled87Rb atoms with higher order modes of an optical nanofibre

Interaction of laser-cooled87Rb atoms with higher order modes of an optical nanofibre

Nanostructured optical nanofibres for atom trapping

Optical Nanofibers

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Product

Resources

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Interaction of laser-cooled⁸⁷Rb atoms with higher order modes of an optical nanofibre

Interaction of laser-cooled⁸⁷Rb atoms with higher order modes of an optical nanofibre