Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magneto-optical trap

Li, Y.; Wu, Jizhou; Gao, Feng; Nute, Jonathan; Piano, Samanta; Hackermüller, Lucia; Ma, Jie; Liu, Xiao; Jia, Suotang

doi:10.1088/1612-2011/12/5/055501

Cited by 11 publications

(7 citation statements)

References 26 publications

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“…• Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magnetooptical trap-enhanced 3D degenerated Raman sideband cooling of caesium atoms in a standard single-cell vapour-loaded magneto-optical trap is reported [36].…”

Section: • Controlled Generation Of Nonlinear Resonances Through Sinumentioning

confidence: 91%

Introducing theLaser PhysicsandLaser Physics Lettershighlights of 2015

McKenna¹

2016

Laser Phys. Lett.

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The International Year of Light 2015 was a landmark for the laser and optics community pointing the way to a bright future for humanity and the environment. It is with great satisfaction that Laser Physics and Laser Physics Letters have published many notable articles that have contributed to the development of light-based technologies and breakthroughs in photonics. In recognition of their high quality, we present a selection of some of the most popular articles published by Laser Physics and Laser Physics Letters throughout 2015, all of which are believed to have the potential to make a high impact on future research directions. Those chosen are recognised for their high-interest with readers and importance in the field, providing a snapshot of the broad subject coverage and international make-up of both journals.Starting this year, we will be recognising and announcing annual highlights of a previous year for both journals. We hope that you find these highlights useful and look forward to publishing more cutting-edge work in the year ahead.Summary of the highlights articles: Physics of lasers• • Experimental investigation of the light shift effect in an optical-magnetic double resonance system-an experimental scheme for studying the light shift effect in an optical magnetic double resonance system by using 4 He atoms is demonstrated [3]. • Enhanced random lasing from a colloidal CdSe quantum dot-Rh6G system-randomlaser action in a system where optical amplification is provided by colloidal CdSe quantum dots triggered by the emission from Rhodamine 6 G is reported [4].• Ultra-short pulse generation in the hybridly mode-locked erbium-doped all-fiber ring laser with a distributed polarizer-ultra-short pulse generation in a dispersion-managed erbium-doped all-fiber ring laser hybridly mode-locked with boron nitride-doped singlewalled carbon nanotubes, in co-action with a nonlinear polarization evolution in the ring cavity with a distributed polarizer, is reported for the first time [5].• Analysis of pump excited state absorption and its impact on laser efficiency-a model to quantify the effect of excited state absorption at the pump wavelength on laser efficiency, threshold and heating is developed [6]. Fibre optics and fibre lasers• 80 fs passively mode-locked Er-doped fiber laser-an Er-doped laser that has an all-fiber design, including the dispersion compensation and external compression stages, forming a robust and compact device, is reported [7].• Bound-state fiber laser mode-locked by a graphene-nanotube saturable absorbermultiple bound states in a linear-cavity fiber laser mode-locked by a mixture of graphene and single-walled carbon nanotubes is experimentally observed [8]. Jarlath McKenna Publisher, Laser Physics and Laser Physics Letters Introducing the Laser Physics and Laser Physics Letters highlights of 2015Laser Physics Letters

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Section: • Controlled Generation Of Nonlinear Resonances Through Sinumentioning

confidence: 91%

Introducing theLaser PhysicsandLaser Physics Lettershighlights of 2015

McKenna¹

2016

Laser Phys. Lett.

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“…Initially, 133 Cs atoms are cooled to a temperature of about 200 µK in a magneto-optical trap (MOT). To prepare the ultracold atomic sample, the magnetic field gradient-compressed and optical molasses-cooled Cs atoms are finally cooled to a temperature of ∼ 1.7 µK and spin-polarized to the lowest hyperfine ground state |F = 3, m F = 3 using three-dimensional degenerated Raman sideband cooling 31 . A magnetic field gradient of ∂B/∂z = 31.3 G/cm and crossed dipole trap are employed to levitate and collect the cooled atoms, as depicted in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Ultracold 133 Cs atoms in the hyperfine state F = 3, m F = 3 are prepared using three dimensional degenerated Raman sideband cooling (3D DRSC) 31 and then loaded into a crossed optical dipole trap with trap frequencies (ω x , ω y , ω z )/2π = (63, 56, 83) Hz using the magnetic levitation technique (Fig. 1a).…”

Section: Scheme For Generating Fano Resonancementioning

confidence: 99%

Fano effect in an ultracold atom-molecule coupled system

Gao

et al. 2019

Phys. Rev. A

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The Fano effect or Fano resonance with a characteristically asymmetric line shape originates from quantum interference between direct and indirect transition pathways in continuumbound coupled systems, and is a ubiquitous phenomenon in atomic 1,2 , molecular 3 , nuclear 4,5 and solid-state physics 6-8 . In optical nanoscale structures, the Fano effect has wide-ranging applications that include optical filtering 9 , sensing 10 , all-optical switching 11 , quantum interferometry 12 and nonlinear optics 13 , and this opens new avenues for photonic devices. The emergent area of ultracold atomic and molecular gases presents an ideal platform for studying Fano resonances, since the physical parameters of these gases can be extensively tuned with high precision using external fields. However, an experimental demonstration of the Fano effect in hybridized atom-molecular coupled systems has remained elusive. Here, we report on observations of the Fano effect in molecular spectra obtained by photoassociation (PA) near a d-wave Feshbach resonance. This effect occurs due to quantum interference in PA transitions involving the continuum of atom-atom scattering states, the underlying Feshbach and photoassociated excited bound molecular states. We measure the variation in atom loss rate with an external magnetic field close to the Feshbach resonance in the presence of PA laser, and thereby clearly demonstrate the Fano effect. Our results further reveal that the Fano effect has significant influence on spectral shifts. Based on Fano's method, we develop a theory that explains the observed experimental results relatively well. Our theoretical formulation takes into account quantum interference between or among multiple transition pathways and between inelastic channels. Our results present a novel method for tuning the collisional interaction strength with laser light using Fano resonance.

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“…To obtain an ultracold atomic sample, the three–dimensional (3D) degenerated Raman sideband cooling (DRSC) is employed to cool and polarize the Cs atoms in the desired state , 38 . After 10 ms of 3D DRSC, we obtain atoms with the temperature of ~1.7 μ K 39 . Subsequently, the cooled atoms are loaded into a large–volume crossed ODT operating at 1070 nm.…”

Section: Methodsmentioning

confidence: 99%

Manipulation of photoassociation of ultracold Cs atoms with tunable scattering length by external magnetic fields

Gao

Wang

et al. 2017

Sci Rep

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We demonstrate that for ultracold, optically trapped Cs atoms the photoassociation (PA) can be manipulated by using external uniform magnetic fields due to the alteration of the scattering wavefunction in the region of the free–bound optical transition. We present PA–induced atom loss measurements with the same intensity for PA laser but different external magnetic fields, and analyze main contributions of the PA to the variation of the number of atoms in the trap. The PA rate exhibits a strong dependence on the changing uniform magnetic field. The experimental data are simulated within the model of a single–channel one–well rectangular potential, whose depth is adjusted so as to assure the predicted variation of the scattering length with the magnetic field. The computational and experimental results are in a reasonable agreement to each other. The same model is used to illustrate some general properties of the two–body quantum system in the near–threshold state.

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Enhanced Raman sideband cooling of caesium atoms in a vapour-loaded magneto-optical trap

Cited by 11 publications

References 26 publications

Introducing theLaser PhysicsandLaser Physics Lettershighlights of 2015

Introducing theLaser PhysicsandLaser Physics Lettershighlights of 2015

Fano effect in an ultracold atom-molecule coupled system

Manipulation of photoassociation of ultracold Cs atoms with tunable scattering length by external magnetic fields

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