Subpicotesla scalar atomic magnetometer with a microfabricated cell

Rui Zhang, Terry Dyer, Nathan Brockie, Roozbeh Parsa, Rahul Mhaskar

Research output: Contribution to journalArticle

Abstract

We demonstrated a scalar atomic magnetometer using a microfabricated Cs vapor cell. The atomic spin precession is driven by an amplitude-modulated circularly-polarized pump laser resonant on the D1 transition of Cs atoms and detected by an off-resonant linearly-polarized probe laser using a balanced polarimeter setup. Under a magnetic field with amplitude in the Earth's magnetic field range, the magnetometer in the gradiometer mode can reach sensitivities below 150fT/√Hz, which shows that the magnetometer by itself can achieve sub-100fT/√Hz sensitivities. In addition to its high sensitivity, the magnetometer has a bandwidth close to 1 kHz due to the broad magnetic resonance inside the small vapor cell. Our experiment suggests the feasibility of a portable low-power and high-performance magnetometer which can be operated in the Earth's magnetic field. Such a device will greatly reduce the restrictions on the operating environment and expand the range of applications for atomic magnetometers, such as detection of nuclear magnetic resonance in low magnetic fields
LanguageEnglish
Article number124503
Number of pages4
JournalJournal of Applied Physics
Volume126
Issue number12
Early online date26 Sep 2019
DOIs
Publication statusPublished - 28 Sep 2019

Fingerprint

magnetometers
scalars
cells
magnetic fields
sensitivity
vapors
gradiometers
polarimeters
precession
lasers
magnetic resonance
constrictions
pumps
bandwidth
nuclear magnetic resonance
probes
atoms

Keywords

  • scalar atomic magnetometer
  • microfabricated cell
  • atomic spin
  • magnetic field

Cite this

Zhang, Rui ; Dyer, Terry ; Brockie, Nathan ; Parsa, Roozbeh ; Mhaskar, Rahul. / Subpicotesla scalar atomic magnetometer with a microfabricated cell. In: Journal of Applied Physics. 2019 ; Vol. 126, No. 12.
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abstract = "We demonstrated a scalar atomic magnetometer using a microfabricated Cs vapor cell. The atomic spin precession is driven by an amplitude-modulated circularly-polarized pump laser resonant on the D1 transition of Cs atoms and detected by an off-resonant linearly-polarized probe laser using a balanced polarimeter setup. Under a magnetic field with amplitude in the Earth's magnetic field range, the magnetometer in the gradiometer mode can reach sensitivities below 150fT/√Hz, which shows that the magnetometer by itself can achieve sub-100fT/√Hz sensitivities. In addition to its high sensitivity, the magnetometer has a bandwidth close to 1 kHz due to the broad magnetic resonance inside the small vapor cell. Our experiment suggests the feasibility of a portable low-power and high-performance magnetometer which can be operated in the Earth's magnetic field. Such a device will greatly reduce the restrictions on the operating environment and expand the range of applications for atomic magnetometers, such as detection of nuclear magnetic resonance in low magnetic fields",
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Subpicotesla scalar atomic magnetometer with a microfabricated cell. / Zhang, Rui; Dyer, Terry; Brockie, Nathan; Parsa, Roozbeh; Mhaskar, Rahul.

In: Journal of Applied Physics, Vol. 126, No. 12, 124503, 28.09.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Subpicotesla scalar atomic magnetometer with a microfabricated cell

AU - Zhang, Rui

AU - Dyer, Terry

AU - Brockie, Nathan

AU - Parsa, Roozbeh

AU - Mhaskar, Rahul

PY - 2019/9/28

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N2 - We demonstrated a scalar atomic magnetometer using a microfabricated Cs vapor cell. The atomic spin precession is driven by an amplitude-modulated circularly-polarized pump laser resonant on the D1 transition of Cs atoms and detected by an off-resonant linearly-polarized probe laser using a balanced polarimeter setup. Under a magnetic field with amplitude in the Earth's magnetic field range, the magnetometer in the gradiometer mode can reach sensitivities below 150fT/√Hz, which shows that the magnetometer by itself can achieve sub-100fT/√Hz sensitivities. In addition to its high sensitivity, the magnetometer has a bandwidth close to 1 kHz due to the broad magnetic resonance inside the small vapor cell. Our experiment suggests the feasibility of a portable low-power and high-performance magnetometer which can be operated in the Earth's magnetic field. Such a device will greatly reduce the restrictions on the operating environment and expand the range of applications for atomic magnetometers, such as detection of nuclear magnetic resonance in low magnetic fields

AB - We demonstrated a scalar atomic magnetometer using a microfabricated Cs vapor cell. The atomic spin precession is driven by an amplitude-modulated circularly-polarized pump laser resonant on the D1 transition of Cs atoms and detected by an off-resonant linearly-polarized probe laser using a balanced polarimeter setup. Under a magnetic field with amplitude in the Earth's magnetic field range, the magnetometer in the gradiometer mode can reach sensitivities below 150fT/√Hz, which shows that the magnetometer by itself can achieve sub-100fT/√Hz sensitivities. In addition to its high sensitivity, the magnetometer has a bandwidth close to 1 kHz due to the broad magnetic resonance inside the small vapor cell. Our experiment suggests the feasibility of a portable low-power and high-performance magnetometer which can be operated in the Earth's magnetic field. Such a device will greatly reduce the restrictions on the operating environment and expand the range of applications for atomic magnetometers, such as detection of nuclear magnetic resonance in low magnetic fields

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