Slowing a light pulse in a degenerate two-level system is observed with a double-frequency sweeping technique, The effects of coupling beam intensity, cell temperature and frequency detunings of the coupling and probe...Slowing a light pulse in a degenerate two-level system is observed with a double-frequency sweeping technique, The effects of coupling beam intensity, cell temperature and frequency detunings of the coupling and probe beams in resonance, on the slowing of light propagation in such a system are investigated. It is found that group velocities depend strongly on polarization combinations. A group velocity υg=6760m/s of light pulses in caesium vapour is obtained under the optimal parameters.展开更多
基金Project supported by the National Natural Science Foundation of China （Grant Nos 10174047 and 60378004）, the Natural Science Foundation of Shanxi Province （Grant No 20021032） and the Youth Science Foundation of Shanxi Province （Grant Nos 20031004 and 20041013）.
文摘Slowing a light pulse in a degenerate two-level system is observed with a double-frequency sweeping technique, The effects of coupling beam intensity, cell temperature and frequency detunings of the coupling and probe beams in resonance, on the slowing of light propagation in such a system are investigated. It is found that group velocities depend strongly on polarization combinations. A group velocity υg=6760m/s of light pulses in caesium vapour is obtained under the optimal parameters.
