Open AccessUltra-narrow electromagnetically induced transparency and inversionless gain in a ladder-four-level system
Author(s) -
Yongfang Li,
Jianfeng Sun
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.547
Subject(s) - electromagnetically induced transparency , physics , excitation , rabi frequency , realization (probability) , dipole , quantum electrodynamics , atomic physics , optics , quantum mechanics , laser , statistics , mathematics
In this paper, we study the effects of Rabi frequencies and multi-path radiation on the electromagnetically induced transparency (EIT) and the inversionless gain in a ladder- four-level system driven by two-coherent fields- The Rabi frequencies of the field-driven transition from the upper level to middle levels play an important role for the realization of the ultra-narrow EIT and inversionless gain- Different excitation mechanism can change the position of the EIT- The action of the spontaneous alignment of the dipole moment is investigated- The explanation for the numerical results is presented using the theory of dressed state