Linewidth narrowing and other quantum coherent effects based on three-photon coherent population trapping （CPT） in Ca＋ ions are investigated. If the propagation directions of the three lasers obey the phase matchin...Linewidth narrowing and other quantum coherent effects based on three-photon coherent population trapping （CPT） in Ca＋ ions are investigated. If the propagation directions of the three lasers obey the phase matching condition, the dark linewidth resulting from the CPT can be very narrow, and it can be controlled by adjusting the parameters of the lasers.展开更多
基金Acknowledgements We thank Prof. Yi-fu Zhu for useful discus- sion. This work was supported by the National Basic Research Pro- gram of China （Grant No. 2005CB724502）, the National Natural Science Foundation of China （Grant Nos. 10874205 and 10774161） and the Chinese Academy of Sciences.
文摘Linewidth narrowing and other quantum coherent effects based on three-photon coherent population trapping （CPT） in Ca＋ ions are investigated. If the propagation directions of the three lasers obey the phase matching condition, the dark linewidth resulting from the CPT can be very narrow, and it can be controlled by adjusting the parameters of the lasers.
