Double-control coherent absorption and transparency in a six-level optical gain medium

The application of two coupling/pump fields to an M-type six-level atomic system in order to manipulate the probe response is suggested in this paper. With the inverted population condition the analytical formulation of the probe response is examined under the purview of coupling field-induced double-control quantum interference effects at different detunings. In particular, we report electromagnetically induced absorption and transparency via controlling the driving contribution of two coupling fields on different probe transitions. These driving contributions of the two coupling fields rely on lower-level hyperfine coherence, detuning and strength.