RT - Journal Article T1 - A scheme for the gain, EIT and AIT control by the number of coupling photons and decay rate of a four-level diamond system JF - opsi YR - 2015 JO - opsi VO - 21 IS - 0 UR - http://opsi.ir/article-1-790-en.html SP - 1547 EP - 1550 K1 - Four-Level System K1 - Full Quantum K1 - Electromagnetically Induced Transparency K1 - Diamond K1 - Gain K1 - Control AB - In this paper a four-level diamond configuration system interacting with four quantized electromagnetic mode is investigated. In a special case the number of one electromagnetic mode is set to be zero and an additional spontaneous emission between higher and lower levels are considered. Its absorption and dispersion spectrum profile of electromagnetic show some interesting phenomena, e.g.: electromagnetic induced transparency, electromagnetic induced absorption and a sharp band width of gain and absorption. It is shown that these phenomena are controllable by the number of coupling photons and the decay rate coefficient. LA eng UL http://opsi.ir/article-1-790-en.html M3 ER -