On correctness of the two-level model for description of active medium in quantum plasmonicsстатья
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Дата последнего поиска статьи во внешних источниках: 30 июня 2021 г.
Аннотация:In order to simplify the theoretical description of spasers, a gain medium is commonly represented by a two-level system (TLS). A realistic model, however, should have four levels. By using the Lindblad equations we develop a description of such a system and show that depending on ratios of the Rabi frequency and the rate of relaxation of the polarization, a four-level system (FLS) may be reduced to one of two effective TLSs that reproduce the key properties of a FLS.