Characterization of Cs vapor cell coated with octadecyltrichlorosilane using coherent population trapping spectroscopy

Hafiz, Moustafa Abdel; Maurice, Vincent; Chutani, Ravinder Kumar; Passilly, Nicolas; Gorecki, Christophe; Guérandel, Stéphane; Clercq, Emeric de; Boudot, Rodolphe

doi:10.1063/1.4919841

Cited by 14 publications

(5 citation statements)

References 58 publications

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“…The results show no sign of permanent magnetic moment on the Au NPs—the obtained resonance width is 33.5 times narrower compared to the EIT from uncoated cell. In fact, the resonance is of the same order of magnitude as one of the most established coatings—Octadecyltrichlorosilane (OTS) 55 . Moreover, our results are in agreement with several reports in the literature 56–58 stating that the weak N-Au bond in amines-capped Au NPs does not lead to the creation of unpaired spins; the experiments therein detected no permanent magnetic moments.…”

Section: Discussionmentioning

confidence: 99%

Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications

et al. 2019

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Alkali metal vapors enable access to single electron systems, suitable for demonstrating fundamental light-matter interactions and promising for quantum logic operations, storage and sensing. However, progress is hampered by the need for robust and repeatable control over the atomic vapor density and over the associated optical depth. Until now, a moderate improvement of the optical depth was attainable through bulk heating or laser desorption – both time-consuming techniques. Here, we use plasmonic nanoparticles to convert light into localized thermal energy and to achieve optical depths in warm vapors, corresponding to a ~16 times increase in vapor pressure in less than 20 ms, with possible reload times much shorter than an hour. Our results enable robust and compact light-matter devices, such as efficient quantum memories and photon-photon logic gates, in which strong optical nonlinearities are crucial.

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Section: Discussionmentioning

confidence: 99%

Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications

et al. 2019

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“…93,106 However, here, again adsorption and desorption models do not agree well with coating experiments. 90,113 Therefore, as summarized in a recent review, 114 "there is no specific conclusion about interaction between coating and alkali-metal atoms" even if good results are obtained with the use of chains of alkanes (such as paraffin 105 that unfortunately works with a maximum operating temperature of 80 ○ C), of alkenes, 84 or of organochlorosilanes [such as octadecyltrichlorosilane: OTS (with Ea = 0.42 eV 115 ) that works only up to 170 ○ C 116 but to 350 ○ C with special methods 115 ]. Coating the inside of a collimating tube with such materials thus represents a very promising route toward a bright-wall Cs oven but is experimentally non-trivial and was beyond the scope of this study.…”

Section: Materials Based On Cs Coated Cell Experimentsmentioning

confidence: 99%

Comparative analysis of recirculating and collimating cesium ovens

Hahn

Thomas

Boucher

et al. 2022

Review of Scientific Instruments

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We have performed a study of several cesium oven designs. A comparison between recirculating (or sticking-wall) and collimating (or re-emitting-wall) ovens is made in order to extract the most efficient design in terms of beam brightness. Unfortunately, non-reproducible behaviors have been observed, and the most often observed output flux is similar to the sticking-wall case, which is the lowest theoretical value of the two cases, with a beam brightness close to 1018 at. sr−1 s−1 cm−2. The reason of this universally observed behavior is unclear despite having tested several materials for the collimating tube. Conclusion on possible improved design based on sticking of cesium on several (un)cleaned surfaces is given.

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“…Therefore, power broadening, transverse laser intensity distribution, and transit-time effects of the thermal atoms become the major factors, as we demonstrate in the following. In addition, wall collisions are still present which deplete ground-state coherence [39]. Figure 4(a) shows a series of spectra of the magnetic-field-insensitive EIT resonance vs coupler-laser intensity at B = 6 Gauss.…”

Section: Doppler Narrowing and Beam Shape Effects On Eit Linewidthmentioning

confidence: 99%

Doppler narrowing, Zeeman and laser beam-shape effects in $Λ$-type Electromagnetically Induced Transparency on the $^{85}$Rb D2 line in a vapor cell

Ma¹,

Raithel²

2020

Preprint

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We study Λ-type Electromagnetically Induced Transparency (EIT) on the Rb D2 transition in a buffer-gas-free thermal vapor cell without anti-relaxation coating. Experimental data show distinguished features of velocity-selective optical pumping and one EIT resonance. The Zeeman splitting of the EIT line in magnetic fields up to 12 Gauss is investigated. One Zeeman component is free of the first-order shift and its second-order shift agrees well with theory. The full width at half maximum (FWHM) of this magnetic-field-insensitive EIT resonance is reduced due to Doppler narrowing, scales linearly in Rabi frequency over the range studied, and reaches about 100 kHz at the lowest powers. These observations agree with an analytic model for a Doppler-broadened medium developed in Ref. [1,2]. Numerical simulation using the Lindblad equation reveals that the transverse laser intensity distribution and two Λ-EIT systems must be included to fully account for the measured line width and line shape of the signals. Ground-state decoherence, caused by effects that include residual optical frequency fluctuations, atom-wall and trace-gas collisions, is discussed.

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Characterization of Cs vapor cell coated with octadecyltrichlorosilane using coherent population trapping spectroscopy

Cited by 14 publications

References 58 publications

Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications

Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications

Comparative analysis of recirculating and collimating cesium ovens

Doppler narrowing, Zeeman and laser beam-shape effects in $Λ$-type Electromagnetically Induced Transparency on the $^{85}$Rb D2 line in a vapor cell

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