We have found that high-efficiency population inversion is possible for specific pulse areas.
They showed that a combination of Π pulses with time-dependent frequency that follow the population inversion can lead to high-efficiency population inversion.
We numerically solve the effective nonlinear Bloch equations for a specific double GaAs/AlGaAs quantum well structure, taking into account the ultrashort nature of the applied field, and show that high-efficiency population inversion is possible for specific pulse areas.
To have a successful high-efficiency population transfer in a two-subband, n-type, modulation-doped semiconductor quantum well, they used the interaction with a specific chirped electromagnetic field, i.e., a field with time-dependent frequency.
Their method was refined in a following publication where only linearly chirped pulses were used for high-efficiency population transfer[27] and was also applied to three-subband quantum well systems[26].
Using analytical solutions of the effective nonlinear Bloch equations[20], under the rotating wave approximation, we presented closed-form analytical solutions for the electric field amplitude of the electromagnetic field that leads to high-efficiency population transfer[24, 25].
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Studies found associations with access, continuity, comprehensiveness, quality, efficiency, population health, patient satisfaction, costs, and primary care strength.
