Coating Qualities Evaluation for Alkali-Metal Atomic Vapor Cells Based on Frustrated Total Internal Reflection

Quan, Wei; Liu, Yang; Yao, Changfeng

doi:10.1088/0256-307x/31/3/030701

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…If the noises above are optimized by technology means, the sensitivity of the hybrid optical pumping SERF atomic magnetometer approaches to the ultimate sensitivity, which is also helpful to study the atomic spin gyroscope [48][49][50][51][52] .…”

Section: Resultsmentioning

confidence: 99%

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

Liu

Jing

Wang

et al. 2017

Sci Rep

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The hybrid optical pumping spin exchange relaxation free (SERF) atomic magnetometers can realize ultrahigh sensitivity measurement of magnetic field and inertia. We have studied the 85Rb polarization of two types of hybrid optical pumping SERF magnetometers based on 39K-85Rb-4He and 133Cs-85Rb-4He respectively. Then we found that 85Rb polarization varies with the number density of buffer gas 4He and quench gas N2, pumping rate of pump beam and cell temperature respectively, which will provide an experimental guide for the design of the magnetometer. We obtain a general formula on the fundamental sensitivity of the hybrid optical pumping SERF magnetometer due to shot-noise. The formula describes that the fundamental sensitivity of the magnetometer varies with the number density of buffer gas and quench gas, the pumping rate of pump beam, external magnetic field, cell effective radius, measurement volume, cell temperature and measurement time. We obtain a highest fundamental sensitivity of 1.5073 aT/Hz 1/2 (1 aT = 10−18 T) with 39K-85Rb-4He magnetometer between above two types of magnetometers when 85Rb polarization is 0.1116. We estimate the fundamental sensitivity limit of the hybrid optical pumping SERF magnetometer to be superior to 1.8359 × 10−2 aT/Hz 1/2, which is higher than the shot-noise-limited sensitivity of 1 aT/Hz 1/2 of K SERF atomic magnetometer.

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Section: Resultsmentioning

confidence: 99%

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

Liu

Jing

Wang

et al. 2017

Sci Rep

Self Cite

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“…This observation indicated that the coatings could adsorb alkali-metal atoms. Quan et al 13) accurately measured the coating thickness and surface reliefs for alkali-metal vapor cells by using frustrated total internal reflection (FTIR). They found that the FTIR method can precisely measure the coating thickness with an accuracy greater than 2 nm, which can satisfy the evaluation criteria for the assessment of coatings on alkali-metal vapor cells.…”

Section: Introductionmentioning

confidence: 99%

Energy dissipation during collision for anti-relaxation coatings in alkali-metal vapor cells

Chen

Fang

Sang

et al. 2022

Jpn. J. Appl. Phys.

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In this paper, we proposed a method to characterise the coating performance of alkali-metal cells by directly measuring the energy dissipation during collisions between the anti-relaxation coating surface and atoms in the cell. We confirmed that the energy dissipation during collisions is positively correlated with the relaxation characteristics of alkali metals at various temperatures. This discovery is of great significance as it can be utilised to characterise the anti-relaxation coating performance of alkali-metal cells by directly analysing the energy dissipation of anti-relaxation coatings instead of measuring the relaxation time.

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Advances in anti-relaxation coatings of alkali-metal vapor cells

Chi

Quan

Zhang

et al. 2020

Applied Surface Science

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Coating Qualities Evaluation for Alkali-Metal Atomic Vapor Cells Based on Frustrated Total Internal Reflection

Cited by 3 publications

References 12 publications

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

The polarization and the fundamental sensitivity of 39K (133Cs)-85Rb-4He hybrid optical pumping spin exchange relaxation free atomic magnetometers

Energy dissipation during collision for anti-relaxation coatings in alkali-metal vapor cells

Advances in anti-relaxation coatings of alkali-metal vapor cells

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