Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Akin, Thomas; Krzyzewski, Sean; Marino, Alberto M.; Abraham, E.

doi:10.1016/j.optcom.2014.11.049

Cited by 33 publications

(19 citation statements)

References 38 publications

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“…An increased attention has turned recently to the usage of the special optical beams in EIT, particularly optical vortices [31]. An optical vortex is a beam with nonzero orbital angular momentum (OAM), meaning that its optical phase is a function of azimuthal coordinate and the wavefront is helical [32,33].…”

Section: Introductionmentioning

confidence: 99%

Azimuthal modulation of electromagnetically induced transparency using structured light

et al. 2018

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Recently a scheme has been proposed for detection of the structured light by measuring the transmission of a vortex beam through a cloud of cold rubidium atoms with energy levels of the Λ-type configuration [N. Radwell et al., Phys. Rev. Lett. 114, 123603 (2015)]. This enables observation of regions of spatially dependent electromagnetically induced transparency (EIT). Here we suggest another scenario for detection of the structured light by measuring the absorption profile of a weak nonvortex probe beam in a highly resonant five-level combined tripod and Λ (CTL) atomlight coupling setup. We demonstrate that due to the closed-loop structure of CTL scheme, the absorption of the probe beam depends on the azimuthal angle and orbital angular momentum (OAM) of the control vortex beams. This feature is missing in simple Λ or tripod schemes, as there is no loop in such atom-light couplings. One can identify different regions of spatially structured transparency through measuring the absorption of probe field under different configurations of structured control light.

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Section: Introductionmentioning

confidence: 99%

Azimuthal modulation of electromagnetically induced transparency using structured light

et al. 2018

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“…Twisted Laguerre-Gaussian lasers, with orbital angular momentum (OAM) and characterised by doughnut-shaped intensity profiles, are of great interest to a number of growing research fields such as ultra-cold atoms [262–264], microscopy and imaging [265, 266], atomic and nanoparticle manipulation [267, 268], ultra-fast optical communication [269, 270], quantum computing [271], astrophysics [272] and plasma accelerators [47]. Spiral phase plates or computer-generated holograms are usually used to generate visible light with OAM [273–276].…”

Section: Recent Resultsmentioning

confidence: 99%

Raman Techniques: Fundamentals and Frontiers

et al. 2019

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Driven by applications in chemical sensing, biological imaging and material characterisation, Raman spectroscopies are attracting growing interest from a variety of scientific disciplines. The Raman effect originates from the inelastic scattering of light, and it can directly probe vibration/rotational-vibration states in molecules and materials. Despite numerous advantages over infrared spectroscopy, spontaneous Raman scattering is very weak, and consequently, a variety of enhanced Raman spectroscopic techniques have emerged. These techniques include stimulated Raman scattering and coherent anti-Stokes Raman scattering, as well as surface- and tip-enhanced Raman scattering spectroscopies. The present review provides the reader with an understanding of the fundamental physics that govern the Raman effect and its advantages, limitations and applications. The review also highlights the key experimental considerations for implementing the main experimental Raman spectroscopic techniques. The relevant data analysis methods and some of the most recent advances related to the Raman effect are finally presented. This review constitutes a practical introduction to the science of Raman spectroscopy; it also highlights recent and promising directions of future research developments.

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“…III. EXPERIMENT Figure 3 shows our experimental set-up and is similar to that in [19]. We begin with atoms in a magneto-optical trap (MOT) [20] that contains ∼ 10 8 atoms with a density of ∼10 10 cm −3 , a 1/e 2 radius of 2 mm, and a temperature of 50 µK.…”

Section: Theorymentioning

confidence: 99%

Observation of deeply boundRb285vibrational levels using Feshbach optimized photoassociation

et al. 2015

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We demonstrate Feshbach optimized photoassociation (FOPA) into the 0 − g (5S 1/2 +5P 1/2 ) state in 85 Rb 2 . FOPA uses the enhancement of the amplitude of the initial atomic scattering wave function due to a Feshbach resonance to increase the molecular formation rate from photoassociation. We observe three vibrational levels, v = 127, 140, and 150, with previously unmeasured binding energies of 256, 154, and 96 cm −1 . We measure the frequency, central magnetic field position, and magnetic field width of each Feshbach resonance. Our findings experimentally confirm that this technique can measure vibrational levels lower than those accessible to traditional photoassociative spectroscopy.

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Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Cited by 33 publications

References 38 publications

Azimuthal modulation of electromagnetically induced transparency using structured light

Azimuthal modulation of electromagnetically induced transparency using structured light

Raman Techniques: Fundamentals and Frontiers

Observation of deeply boundRb285vibrational levels using Feshbach optimized photoassociation

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