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期刊论文
Laser-induced double-transparencies, narrow resonances, gain without inversion in a four-level system
Physics Letters A 291(2001)215-219,-0001,():
We investigate the absorption spectra of weak probe filed for a four-level system and demonstrate that the quantum interference between the two excited pathways can result in very narrow resonances, double-ransparencies and gain without inversion. The features and origins of these effects are discussed.
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