Fluorescence and Four-Wave Mixing in Electromagnetically Induced Transparency Windows
WANG Zhi-Guo, LI Cheng, ZHANG Zhao-Yang , CHE Jun-Ling, QIN Meng-Zhe, HE Jia-Nan, ZHANG Yan-Peng**
Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, Xi'an Jiaotong University, Xi'an 710049
Abstract：We simultaneously compare the probe transmission, Four-Wave Mixing (FWM) and fluorescence signals with dressing effects in a four-level atomic system. The variation rules of three types of signals are exhibited by changing the frequency detuning and power of incident laser beams. The interplay between two ladder subsystems is investigated in the Y-type atomic system. In particular, the fluorescence signal with ultra-narrow linewidth is obtained due to being sheared twice by the electromagnetically induced transparency window. Such fluorescence with very high coherence and monochromaticity can be used for the quantum correlation and narrow linewidth laser.
2013, Vol. 30 
