Hsiao, Y-F, Tsai P-J, Chen H-S, Lin S-X, Hung C-C, Lee C-H, Chen Y-H, Chen Y-F, Yu IA, Chen Y-C.
2018.
Highly Efficient Coherent Optical Memory Based on Electromagnetically Induced Transparency. Phys. Rev. Lett. 120(183602)
Hsiao, Y-F, Tsai P-J, Lin C-C, Chen Y-F, Yu IA, Chen Y-C.
2014.
Coherence properties of amplified slow light by four-wave mixing. Optics Letters. 39(12):3394-3397.
AbstractWe present an experimental study of the coherence properties of amplified slow light by four-wave mixing (FWM) in a three-level electromagnetically induced transparency (EIT) system driven by one additional pump field. High energy gain (up to 19) is obtained with a weak pump field (a few mW∕cm2) using optically dense cold atomic gases. A large fraction of the amplified light is found to be phase incoherent to the input signal field. The dependence of the incoherent fraction on pump field intensity and detuning and the control field intensity is systematically studied. With the classical input pulses, our results support a recent theoretical study by Lauk et al. [Phys. Rev. A 88, 013823 (2013)], showing that the noise resulting from the atomic dipole fluctuations associated with spontaneous decay is significant in the high gain regime. This effect has to be taken into consideration in EIT-based applications in the presence of FWM.
Tu, MF, Ho JJ, Hsieh CC, Chen YC.
2009.
Intense SrF radical beam for molecular cooling experiments, Nov. Review of Scientific Instruments. 80:5., Number 11
AbstractWe have developed a continuous SrF radical beam for the loading of helium buffer gas cooling. The SrF molecules are efficiently generated by high-temperature chemical reaction of the solid precursor SrF(2) with boron in a graphite oven. The beam properties are characterized with laser-induced fluorescence spectroscopic method. We obtain a molecular flux of up to 2.1 x 10(15) sr(-1) s(-1) at the detection region for all rotational states. The dependence of the flux on oven temperature suggests that even higher flux is possible if a higher temperature in the oven is achieved. (C) 2009 American Institute of Physics. [doi:10.1063/1.3262631]
Tung, SK, Chen YC, Lin CW, Hsu L, Yu IA.
2000.
Cooling atoms below 100 mu K, Apr. Chinese Journal of Physics. 38:395-399., Number 2
AbstractWe capture Rb-87 atoms from room-temperature background vapor with a magneto-optical trap (MOT). The temperature of the atoms in the MOT is 320 mu K as the result of Doppler cooling. We further employ polarization gradient cooling to lower atom temperature. The factors that can affect the performance of polarization gradient cooling have been systematically studied. An atom temperature of 75 mu K has been reached with the optimized conditions. Temperatures are measured by the release and recapture method and the time of flight method. Such cold atoms are ready for the evaporative cooling which will finally realize the Bose-Einstein condensation.