Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Japanese Journal of Applied Physics

Laser Cooling and Trapping of Argon and Krypton Using Diode Lasers

Hidetoshi Katori, Fujio Shimizu

Published Nov 1, 1990• 29 citations
Publisher

Abstract

The laser cooling and trapping of argon and krypton isotopes in the 1s5 metastable state are demonstrated using stabilized diode lasers. Even isotopes of krypton are separately trapped by tuning the laser frequency. For Ar and 84Kr, approximately 6×105 and 1×105 atoms are trapped, respectively.
DOI
10.1143/jjap.29.l2124

Related papers

Bright metastable noble gas atomic beam and atom trap using laser cooling

Cheng Cun-Feng, Yang Guo-Min, Wei Jiang +5 more

Metastable noble gas atomic beam is widely used in atomic and molecular physics studies.Using radio-frequency discharge and transverse laser cooling, we produced a well-collimated intense meta-stable Krypton beam.Numerical simulation is also used to analyze the trajectories of atoms in an optic field produced by transverse cooling laser beams.The charactersisticl of the atomic beam are determined by measuring the laser induced fluorescence.The atomic beam flux measured at 230 cm downstream is 1.61016 atoms/(s*sr), which is enhanced by two orders of magnitude.The Kr atoms are finally trapped in a magneto-optic trap.A total of 1.31010 meta-stable 84Kr atoms can be simultaneously trapped with a loading rate of 3.01011 atoms/s.The same setup is also successfully used to obtain a bright metastable atomic argon beam and trap.

Acta Physica Sinica•Jan 1, 2011•3 citations

All-diode-laser cooling of Sr + isotope ions for analytical applications

Kyunghun Jung, Kazuhiro Yamamoto, Yuta Yamamoto +3 more

Abstract Trapping and cooling of Sr + isotope ions by an all-diode-laser system has been demonstrated in order to develop a novel mass spectrometric technique in combination with ion trap-laser cooling. First, we constructed external cavity diode lasers and associated stabilization apparatus for laser cooling of Sr + ions. The transition frequencies confirmed by optogalvanic spectroscopy enabled successful cooling of 88 Sr + ions. An image of two trapped ions has been captured by CCD camera. Minor isotopes, 84 Sr + and 86 Sr + , were also cooled and trapped. From an analysis of the observed spectra of a string crystal of each isotope, the isotope shifts of the cooling transition (5s 2 S 1/2 → 5p 2 P 1/2 ) of Sr + ions were determined to be +371(8) MHz for Δν 84–88 and +169(8) MHz for Δν 86–88 . In the case of the repumping transition (4d 2 D 3/2 → 5p 2 P 1/2 ), Δν 84–88 and Δν 86–88 were measured to be −833(6) and −400(5) MHz, respectively. These values are in good agreement with previously reported values.

Japanese Journal of Applied Physics•May 23, 2017•11 citations

Laser cooling and trapping of argon metastable atomic beam

Juan Carlos Catala

The high velocity of free atoms associated with the thermal motion, together with the velocity distribution of atoms has imposed the ultimate limitation on the precision of ultrahigh resolution spectroscopy. A sample consisting of low velocity atoms would provide a substantial improvement in spectroscopy resolution. To overcome the problem of thermal motion, atomic physicists have pursued two goals; first, the reduction of the thermal motion (cooling); and second, the confinement of the atoms by means of electromagnetic fields (trapping). Cooling carried sufficiently far, eliminates the motional problems, whereas trapping allows for long observation times. In this work the laser cooling and trapping of an argon atomic beam will be discussed. The experiments involve a time-of-flight spectroscopy on metastable argon atoms. Laser deceleration or cooling of atoms is achieved by counter propagating a photon against an atomic beam of metastable atoms. The solution to the Doppler shift problem is achieved using spatially varying magnetic field along the beam path to Zeeman shift the atomic resonance frequency so as to keep the atoms in resonance with a fixed frequency cooling laser. For trapping experiments a Magnetooptical trap (MOT) will be used. The MOT is formed by three pairs of counter-propagating laser beams with mutual opposite circular polarization and a frequency tuned slightly below the center of the atomic resonance and superimposed on a magnetic quadrupole field.

•Nov 21, 1998•0 citations

Laser cooling and trapping of Ne metastable atoms

Fujio Shimizu, Kazuko Shimizu, Hiroshi Takuma

A neon atomic beam in the metastable state 1${s}_{5}$ has been decelerated and trapped by the spontaneous light force of a resonant laser in a quadrupole magnetic field. Trapping has been achieved on all isotopes $^{20}\mathrm{Ne}$, $^{21}\mathrm{Ne}$, and $^{22}\mathrm{Ne}$ using a sample with natural abundance. For $^{20}\mathrm{Ne}$, approximately 4\ifmmode\times\else\texttimes\fi{}${10}^{7}$ atoms are trapped.

Physical Review A•Mar 1, 1989•63 citations

Laser Cooling of Neutral Atoms

Strick, Jeffrey E

The theory of cooling neutral atoms to microkelvin temperatures using a magneto optical trap will be presented. The system that is discussed uses a stabilized grating tuned diode laser that is controlled using feedback from a saturation absorption spectrophotometer to produce narrow band continuously tunable IR light for trapping rubidium atoms. A description of the design and construction of each of the components used to create the magneto optical trap will also be discussed. In the final section a description of an exceptionally accurate atomic clock that is used to measure the natural resonance frequency of laser cooled cesium atoms is also presented.

•Jan 1, 2002•0 citations

Laser cooling of neutral argon for simulating the storage of antimatter

Shin Satori, Hitoshi Kuninaka, K. Kuriki

The storage of antimatter in an electrically neutral state is one of the breakthroughs required to realize antimatter applications. In this work, use of laser cooling to manipulate the motion of neutral atoms by radiative pressure was demonstrated using a commercial laser diode and metastable argon as antimatter simulant. The concept of critical velocity was introduced as a criterion for the laser cooling and its importance was experimentally demonstrated.

Journal of Propulsion and Power•Sep 1, 1996•1 citation
Metastable noble gas atomic beam is widely used in atomic and molecular physics studies.Using radio-frequency discharge and transverse laser cooling, we produced a well-collimated intense meta-stable Krypton beam.Numerical simulation is also used to analyze the trajectories of atoms in an optic field produced by transverse cooling laser beams.The charactersisticl of the atomic beam are determined by measuring the laser induced fluorescence.The atomic beam flux measured at 230 cm downstream is 1.61016 atoms/(s*sr), which is enhanced by two orders of magnitude.The Kr atoms are finally trapped in a magneto-optic trap.A total of 1.31010 meta-stable 84Kr atoms can be simultaneously trapped with a loading rate of 3.01011 atoms/s.The same setup is also successfully used to obtain a bright metastable atomic argon beam and trap.
Abstract Trapping and cooling of Sr + isotope ions by an all-diode-laser system has been demonstrated in order to develop a novel mass spectrometric technique in combination with ion trap-laser cooling. First, we constructed external cavity diode lasers and associated stabilization apparatus for laser cooling of Sr + ions. The transition frequencies confirmed by optogalvanic spectroscopy enabled successful cooling of 88 Sr + ions. An image of two trapped ions has been captured by CCD camera. Minor isotopes, 84 Sr + and 86 Sr + , were also cooled and trapped. From an analysis of the observed spectra of a string crystal of each isotope, the isotope shifts of the cooling transition (5s 2 S 1/2 → 5p 2 P 1/2 ) of Sr + ions were determined to be +371(8) MHz for Δν 84–88 and +169(8) MHz for Δν 86–88 . In the case of the repumping transition (4d 2 D 3/2 → 5p 2 P 1/2 ), Δν 84–88 and Δν 86–88 were measured to be −833(6) and −400(5) MHz, respectively. These values are in good agreement with previously reported values.
The high velocity of free atoms associated with the thermal motion, together with the velocity distribution of atoms has imposed the ultimate limitation on the precision of ultrahigh resolution spectroscopy. A sample consisting of low velocity atoms would provide a substantial improvement in spectroscopy resolution. To overcome the problem of thermal motion, atomic physicists have pursued two goals; first, the reduction of the thermal motion (cooling); and second, the confinement of the atoms by means of electromagnetic fields (trapping). Cooling carried sufficiently far, eliminates the motional problems, whereas trapping allows for long observation times. In this work the laser cooling and trapping of an argon atomic beam will be discussed. The experiments involve a time-of-flight spectroscopy on metastable argon atoms. Laser deceleration or cooling of atoms is achieved by counter propagating a photon against an atomic beam of metastable atoms. The solution to the Doppler shift problem is achieved using spatially varying magnetic field along the beam path to Zeeman shift the atomic resonance frequency so as to keep the atoms in resonance with a fixed frequency cooling laser. For trapping experiments a Magnetooptical trap (MOT) will be used. The MOT is formed by three pairs of counter-propagating laser beams with mutual opposite circular polarization and a frequency tuned slightly below the center of the atomic resonance and superimposed on a magnetic quadrupole field.
A neon atomic beam in the metastable state 1s5{s}_{5}s5​ has been decelerated and trapped by the spontaneous light force of a resonant laser in a quadrupole magnetic field. Trapping has been achieved on all isotopes 20Ne^{20}\mathrm{Ne}20Ne, 21Ne^{21}\mathrm{Ne}21Ne, and 22Ne^{22}\mathrm{Ne}22Ne using a sample with natural abundance. For 20Ne^{20}\mathrm{Ne}20Ne, approximately 4\ifmmode\times\else\texttimes\fi{}107{10}^{7}107 atoms are trapped.
The theory of cooling neutral atoms to microkelvin temperatures using a magneto optical trap will be presented. The system that is discussed uses a stabilized grating tuned diode laser that is controlled using feedback from a saturation absorption spectrophotometer to produce narrow band continuously tunable IR light for trapping rubidium atoms. A description of the design and construction of each of the components used to create the magneto optical trap will also be discussed. In the final section a description of an exceptionally accurate atomic clock that is used to measure the natural resonance frequency of laser cooled cesium atoms is also presented.