Double-resonance optical pumping of Rb atoms

Moon, Han Seb; Lee, Lim; Kim, Jung Bog

doi:10.1364/josab.24.002157

Cited by 47 publications

(40 citation statements)

References 14 publications

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“…Our ACWG configuration is characterized by a short transit of the atom in the evanescent field, in the order of 1 ns. This transit time is shorter than the lifetimes of the relevant transitions, and thus the atom is not expected to relax to other levels as in the case of DROP experiments41. Owing to the above, the F=3→F′=3 population difference is expected to decrease, resulting in an enhanced absorption.…”

Section: Resultsmentioning

confidence: 97%

“…5a, showing schematics of a counter-propagating pump–probe scheme for a resonant two-photon excitation. In this scheme, we inverted the role of the pump and the probe, as is used in the double resonance optical pumping (DROP) method41. Here, we monitor the variations in transmission of light at the wavelength of 780 nm, which is aligned with the 85 Rb F=3→F′=3 transition, as a result of applying a pump signal at a wavelength of ~776 nm.…”

Section: Resultsmentioning

confidence: 99%

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Nanoscale light–matter interactions in atomic cladding waveguides

et al. 2013

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Alkali vapours, such as rubidium, are being used extensively in several important fields of research such as slow and stored light nonlinear optics quantum computation, atomic clocks and magnetometers. Recently, there is a growing effort towards miniaturizing traditional centimetre-size vapour cells. Owing to the significant reduction in device dimensions, light–matter interactions are greatly enhanced, enabling new functionalities due to the low power threshold needed for nonlinear interactions. Here, taking advantage of the mature platform of silicon photonics, we construct an efficient and flexible platform for tailored light–vapour interactions on a chip. Specifically, we demonstrate light–matter interactions in an atomic cladding waveguide, consisting of a silicon nitride nano-waveguide core with a rubidium vapour cladding. We observe the efficient interaction of the electromagnetic guided mode with the rubidium cladding and show that due to the high confinement of the optical mode, the rubidium absorption saturates at powers in the nanowatt regime.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Nanoscale light–matter interactions in atomic cladding waveguides

et al. 2013

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“…Strong blue fluorescence caused by the spontaneous decay for the 7P 3/2 -6S 1/2 transition (corresponding to 456 nm) and 7P 1/2 -6S 1/2 transition (corresponding to 459 nm) is clearly observed in experiment. Due to this two-photon excitation and spontaneous decay, the population of the F = 4 ground state are optically pumped to the F = 3 ground state, therefore absorption of the probe beam accordingly decreases, forming the DROP spectrum [5][6][7]. in Fig.…”

Section: Theoretical Analyses and Experimental Resultsmentioning

confidence: 99%

“…We note that for a Dopplerbroadened ladder-type atomic system, a DROP experimental setup for CTP configuration is the same as that for an EIT experiment. Only one different point is that in a normal EIT experiment, the coupling laser's is fixed while the probe laser's frequency scans between the ground and intermediate states [15], whereas in the DROP experiment, the coupling laser's frequency scans between the intermediate and higher excited states while the probe laser is locked on resonance [6,7]. But when two-photon detuning between the coupling and probe beams is around zero, DROP and EIT will take effect simultaneously, yielding probe absorption reducing.…”

Section: Theoretical Analyses and Experimental Resultsmentioning

confidence: 99%

“…The DROP technique differs from the OODR method in that it detects the variation of the ground-state population instead of the intermediatestate population as in the OODR technique, so the DROP spectra have a higher SNR. DROP spectra have already been investigated and applied to laser frequency stabilization [6,7]. In fact, in a DROP experimental system, there exists an atomic coherence effect such as electromagnetically induced transparency (EIT), which has received less attention.…”

Section: Introductionmentioning

confidence: 99%

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Narrow-linewidth double-resonance optical pumping spectrum due to electromagnetically induced transparency in ladder-type inhomogeneously broadened media

Yang

Liang

et al. 2010

Phys. Rev. A

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Based on the cesium 6S 1/2 -6P 3/2 -8S 1/2 ladder-type atomic system, double-resonance optical pumping (DROP) spectra including electromagnetically induced transparency (EIT) effects have been investigated with a roomtemperature cesium vapor cell. For both cases of the probe and the coupling laser beams passing through the cesium vapor cell with the counter-propagation (CTP) and co-propagation (CP) configurations, the DROP spectra measured in the experiment display explicitly different linewidths. Thanks to the EIT effect, the linewidth of the DROP spectrum is explicitly narrower for the CTP configuration than for the CP configuration. Experimental results agree with the theoretical analysis considering Doppler averaging. Furthermore, when the coupling laser has moderate power, the DROP spectrum for the CTP configuration clearly shows two components: the narrow part due to the EIT effect and the broad part caused by optical pumping (but these two different components are never seen in the CP configuration). Also, the effect of the intensity of the coupling and probe lasers on the DROP spectra is investigated.

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