Eunmi Chae
Harvard University
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Publication
Featured researches published by Eunmi Chae.
Physical Review Letters | 2017
ïc Anderegg; Benjamin Augenbraun; Eunmi Chae; Boerge Hemmerling; Nicholas Hutzler; Aakash Ravi; Alejandra Collopy; J. Ye; Wolfgang Ketterle; John M. Doyle
We demonstrate significantly improved magneto-optical trapping of molecules using a very slow cryogenic beam source and either rf modulated or dc magnetic fields. The rf magneto-optical trap (MOT) confines 1.0(3)×10^{5} CaF molecules at a density of 7(3)×10^{6} cm^{-3}, which is an order of magnitude greater than previous molecular MOTs. Near Doppler-limited temperatures of 340(20) μK are attained. The achieved density enables future work to directly load optical tweezers and create optical arrays for quantum simulation.
Physical Review Letters | 2015
Mark Yeo; Matthew T. Hummon; Alejandra Collopy; Bo Yan; Boerge Hemmerling; Eunmi Chae; John M. Doyle; J. Ye
We demonstrate the mixing of rotational states in the ground electronic state using microwave radiation to enhance optical cycling in the molecule yttrium (II) monoxide (YO). This mixing technique is used in conjunction with a frequency modulated and chirped continuous wave laser to slow longitudinally a cryogenic buffer-gas beam of YO. We generate a flux of YO below 10 m/s, directly loadable into a three-dimensional magneto-optical trap. This technique opens the door for laser cooling of diatomic molecules with more complex loss channels due to intermediate states.
New Journal of Physics | 2014
Boerge Hemmerling; Garrett Drayna; Eunmi Chae; Aakash Ravi; John M. Doyle
Direct loading of lanthanide atoms into magneto-optical traps (MOTs) from a very slow cryogenic buffer gas beam source is achieved, without the need for laser slowing. The beam source has an average forward velocity of 60– and a velocity half-width of , which allows for direct MOT loading of Yb, Tm, Er and Ho. Residual helium background gas originating from the beam results in a maximum trap lifetime of about 80 ms (with Yb). The addition of a single-frequency slowing laser applied to the Yb in the buffer gas beam increases the number of trapped Yb atoms to with a loading rate of . Decay to metastable states is observed for all trapped species and decay rates are measured. Extension of this approach to the loading of molecules into a MOT is discussed.
Journal of Physics B | 2016
Boerge Hemmerling; Eunmi Chae; Aakash Ravi; Loic Anderegg; Garrett Drayna; Nicholas Hutzler; Alejandra Collopy; J. Ye; Wolfgang Ketterle; John M. Doyle
Physical Review Letters | 2013
Colin B. Connolly; Yat Shan Au; Eunmi Chae; Timur V. Tscherbul; Alexei A. Buchachenko; Hsin-I Lu; Wolfgang Ketterle; John M. Doyle
IOP Publishing | 2017
Eunmi Chae; Loic Anderegg; Benjamin Augenbraun; Aakash Ravi; Boerge Hemmerling; Alejandra Collopy; J. Ye; Nicholas Hutzler; Wolfgang Ketterle; John M. Doyle
Bulletin of the American Physical Society | 2017
Eunmi Chae; Loic Anderegg; Benjamin Augenbraun; Aakash Ravi; Boerge Hemmerling; Nicholas Hutzler; Alejandra Collopy; J. Ye; Wolfgang Ketterle; John M. Doyle
Bulletin of the American Physical Society | 2016
Aakash Ravi; Eunmi Chae; Boerge Hemmerling; Loic Anderegg; Benjamin Augenbraun; Garrett Drayna; Nicholas Hutzler; Alejandra Collopy; Yewei Wu; Shiqian Ding; J. Ye; Wolfgang Ketterle; John M. Doyle
Bulletin of the American Physical Society | 2016
Loic Anderegg; Eunmi Chae; Aakash Ravi; Benjamin Augenbraun; Boerge Hemmerling; Garrett Drayna; Nicholas Hutzler; Alejandra Collopy; Yewei Wu; Shiqian Ding; J. Ye; Wolfgang Ketterle; John M. Doyle
Bulletin of the American Physical Society | 2016
Shiqian Ding; Alejandra Collopy; Yewei Wu; Eunmi Chae; Aakash Ravi; Loic Anderegg; Benjamin Augenbraun; John M. Doyle; J. Ye