Transient gain property of a weak probe field in an asymmetric semiconductor coupled double quantum well structure

Transient gain-absorption properties of the probe field in a semiconductor quantum well

“…It is found that the coupling field and the pumping field as well as the relative phase can affect the transient optical properties of the probe field dramatically, which can be used to manipulate efficiently the gain-absorption coefficient. By comparing the studies in the other complex system [10,21,22], our scheme may be more convenient for experimental realization due to its new characters that the other systems do not have. As a result, the present investigation may provide some new possibilities for obtaining potential applications on solid-state quantum computation and quantum communication.…”

“…In the above derivation process, we have assumed that the central frequencies of these three optical fields satisfy ω c = ω p + ω d , and so the relationship c = p + d can be obtained. By adopting the standard approach [18][19][20][21][22], the density matrix equations of motion in dipole and rotating-wave approximations for this system can be written as follows:…”

“…where we let d = p = 0. It is well known that the absorption is related to the imaginary part of the susceptibility [21,22]. Therefore, the probe gain-absorption coefficient coupled to the transition |2 ↔ |1 is proportional to the terms Im(ρ 12 ).…”

Transient absorption and lasing without inversion in an artificial molecule via Josephson coupling energy

“…Transient properties of the weak probe field via quantum interference such as transient-absorption, transient-dispersion and transient-amplification without inversion are widely investigated [36][37][38][39][40][41][42][43][44][45]. The evolutional optical behaviors of a four-level double-control tripod-configuration EIT system based on the transient solution to the equation of motion of the probability amplitudes of the atomic levels was considered by Shen [36].…”

Manipulation of tunneling induced transparency windows and optical switching features in fivefold quantum dot molecules

“…The dynamical evolution of the weak probe field via quantum interference is also widely studied in many literatures [42][43][44][45][46][47][48][49][50][51]. For instance, Zhang et al compared the steady and transient optical responses of a four-level system and a three-level system, dressed by two and three laser fields, respectively [43].…”