An intense, cold, velocity-controlled molecular beam by frequency-chirped laser slowing

Using frequency-chirped radiation pressure slowing, we precisely control the velocity of a pulsed CaF molecular beam down to a few m s–1, compressing its velocity spread by a factor of 10 while retaining high intensity: at a velocity of 15 m s–1 the flux, measured 1.3 m from the source, is 7 × 105 molecules per cm2 per shot in a single rovibrational state. The beam is suitable for loading a magneto-optical trap or, when combined with transverse laser cooling, improving the precision of spectroscopic measurements that test fundamental physics. We compare the frequency-chirped slowing method with the more commonly used frequency-broadened slowing method.

[1]  Yuqi Zhu,et al.  Improved Radio-Frequency Magneto-Optical Trap of SrF Molecules. , 2016, Chemphyschem : a European journal of chemical physics and physical chemistry.

[2]  M. Tarbutt,et al.  Principles and Design of a Zeeman–Sisyphus Decelerator for Molecular Beams , 2016, Chemphyschem : a European journal of chemical physics and physical chemistry.

[3]  Jun Ye,et al.  Laser slowing of CaF molecules to near the capture velocity of a molecular MOT , 2016, 1603.02787.

[4]  G. Rempe,et al.  Optoelectrical Cooling of Polar Molecules to Submillikelvin Temperatures. , 2015, Physical review letters.

[5]  E. Norrgard,et al.  Submillikelvin Dipolar Molecules in a Radio-Frequency Magneto-Optical Trap. , 2015, Physical review letters.

[6]  M. Tarbutt,et al.  Modeling magneto-optical trapping of CaF molecules , 2015, 1509.04021.

[7]  M. Tarbutt,et al.  Modeling sympathetic cooling of molecules by ultracold atoms: supporting data , 2015, 1508.03987.

[8]  Jun Ye,et al.  Rotational State Microwave Mixing for Laser Cooling of Complex Diatomic Molecules. , 2015, Physical review letters.

[9]  EBNorrgard DJMcCarron,et al.  Improved magneto – optical trapping of a diatomic molecule , 2015 .

[10]  M. Tarbutt.  Magneto-optical trapping forces for atoms and molecules with complex level structures , 2014, 1409.0244.

[11]  E. Norrgard,et al.  Magneto-optical trapping of a diatomic molecule , 2014, Nature.

[12]  G. Rempe,et al.  Continuous centrifuge decelerator for polar molecules. , 2013, Physical review letters.

[13]  P. W. Hess,et al.  Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron , 2013, Science.

[14]  S. Cahn,et al.  Zeeman-tuned rotational level-crossing spectroscopy in a diatomic free radical. , 2013, Physical review letters.

[15]  A. Matsushima,et al.  Laser cooling and slowing of CaF molecules , 2013, 1308.0421.

[16]  E. Hinds,et al.  A search for varying fundamental constants using hertz-level frequency measurements of cold CH molecules , 2013, Nature Communications.

[17]  Christian Chardonnet,et al.  Probing weak force-induced parity violation by high-resolution mid-infrared molecular spectroscopy , 2013, 1309.5630.

[18]  E. Hinds,et al.  Characterization of a cryogenic beam source for atoms and molecules. , 2013, Physical chemistry chemical physics : PCCP.

[19]  E. Hinds,et al.  Design for a fountain of YbF molecules to measure the electron's electric dipole moment , 2013, 1302.2870.

[20]  T. Wall,et al.  Static trapping of polar molecules in a traveling wave decelerator. , 2013, Physical review letters.

[21]  B. Stuhl,et al.  2D Magneto-optical trapping of diatomic molecules. , 2012, Physical review letters.

[22]  B. Stuhl,et al.  Evaporative cooling of the dipolar hydroxyl radical , 2012, Nature.

[23]  G. Meijer,et al.  Manipulation and control of molecular beams. , 2012, Chemical reviews.

[24]  G. Groenenboom,et al.  Communication: Magnetic dipole transitions in the OH A 2Σ+ ← X 2Π system. , 2012, The Journal of chemical physics.

[25]  G. Rempe,et al.  Sisyphus cooling of electrically trapped polyatomic molecules , 2012, Nature.

[26]  J. Doyle,et al.  The buffer gas beam: an intense, cold, and slow source for atoms and molecules. , 2011, Chemical reviews.

[27]  E. Norrgard,et al.  Laser radiation pressure slowing of a molecular beam. , 2011, Physical review letters.

[28]  G. D. Dickenson,et al.  QED effects in molecules: test on rotational quantum states of H2. , 2011, Physical review letters.

[29]  E. Hinds,et al.  Improved measurement of the shape of the electron , 2011, Nature.

[30]  J. Barry,et al.  A bright, slow cryogenic molecular beam source for free radicals. , 2011, Physical chemistry chemical physics : PCCP.

[31]  R. Moszynski,et al.  Prospects for sympathetic cooling of molecules in electrostatic, ac and microwave traps , 2010, 1012.5029.

[32]  J. Barry,et al.  Laser cooling of a diatomic molecule , 2010, Nature.

[33]  G. Meijer,et al.  Deceleration of neutral molecules in macroscopic traveling traps , 2009, 0911.3324.

[34]  D. Glenn,et al.  Radiative force from optical cycling on a diatomic molecule. , 2009, Physical review letters.

[35]  G. Rempe,et al.  Optoelectrical cooling of polar molecules , 2009, 0904.4144.

[36]  B. Stuhl,et al.  Magneto-optical trap for polar molecules. , 2008, Physical review letters.

[37]  A. Libson,et al.  Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun , 2008 .

[38]  A Amy-Klein,et al.  Stability of the proton-to-electron mass ratio. , 2008, Physical review letters.

[39]  A. Libson,et al.  Stopping supersonic beams with a series of pulsed electromagnetic coils: an atomic coilgun. , 2008, Physical review letters.

[40]  Jun Ye,et al.  Cold molecule spectroscopy for constraining the evolution of the fine structure constant. , 2006, Physical review letters.

[41]  F. Machado,et al.  Radiative Transition Probabilities and Lifetimes for the Band Systems A 2 Π − X 2 Σ + of the Isovalent Molecules BeF, MgF and CaF , 2005 .

[42]  A. Bishop,et al.  Optical stark decelerator for molecules. , 2004, Physical review letters.

[43]  Dana Joy Berkeland,et al.  Destabilization of dark states and optical spectroscopy in Zeeman-degenerate atomic systems , 2001, quant-ph/0111018.

[44]  C. Bordé,et al.  LIMIT ON THE PARITY NONCONSERVING ENERGY DIFFERENCE BETWEEN THE ENANTIOMERS OF A CHIRAL MOLECULE BY LASER SPECTROSCOPY , 1999 .

[45]  G. Berden,et al.  Decelerating neutral dipolar molecules , 1999 .

[46]  Hall,et al.  Continuous high-flux monovelocity atomic beam based on a broadband laser-cooling technique. , 1991, Physical review letters.

[47]  W. J. Childs,et al.  Precise determination of the v and N dependence of the spin-rotation and hyperfine interactions in the CaF X2Σ12 ground state☆☆☆ , 1981 .

[48]  P. Bernath,et al.  Rotational and vibrational analysis of the CaF B2Σ+–X2Σ+ system , 1980 .

[49]  R. Zare,et al.  Radiative lifetimes of the alkaline earth monohalides , 1974 .