Acta Optica Sinica, Volume. 24, Issue 4, 563(2004)
Double Electromagnetically Induced Transparency and Ultra-Narrow Line Width in Y-Type Energy Level System
Using matrix equation, the population distribution and absorption characteristics in the molecular Y-type energy level system with two driving fields are calculated and analyzed. The generation of double dark resonance and double electromagnatically induced transparency in this energy level system is obtained, its physical mechanism is discussed. The effect of the quantum interference of the spontaneous emission on the electromagnetically induced transparency are also discussed. Coherence cancellation of the spontaneous emission can form the ultra-narrow line width and enhance the absorption, whereas the coherence enhancement of the spontaneous emission can form the wide absorption line width and weaken its intensity, above calculated results are analyzed with the dressed state theory and agree with those by the density matrix equation.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Double Electromagnetically Induced Transparency and Ultra-Narrow Line Width in Y-Type Energy Level System[J]. Acta Optica Sinica, 2004, 24(4): 563