摘要
We experimentally observe the counterintuitive absorption peaks in the transition spectra of 5S_(1/2)-5P_(3/2)-4D_(5/2) and 5S_(1/2)-5P_(3/2)-4D_(3/2) in a hot 85Rb vapor.These spectra are very different from the spectra observed via double resonance optical pumping or electromagnetically induced transparency in the same transitions.These absorption peaks are from electromagnetically induced absorption due to the two-photon atomic coherence effect.We also investigate the relations between these peaks and the powers of the coupling laser and the probe laser experimentally.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10874171 and 11174271
the National Fundamental Research Program of China under Grant No 2011CB00200
the Knowledge Innovation Project of Chinese Academy Sciences,Program for New Century Excellent Talents in Universities of Ministry of Education of China.
