Manifestation of the optical Stark effect in differential transmission spectra

Abstract

The two-level quantum system is applied in theoretical modelling of the angle-resolved differential absorption spectra induced by the strong near-resonant laser field in quantum dots. The simulations of induced polarization waves at appropriate directions have been performed by means of the density matrix formalism, without using perturbation theory. An interpretation of the differential spectra is provided referring to representation of the dressed states, with their energies experiencing Stark shifts due to the action of the laser field. The feasibility of the light and matter interaction strength characterization via observed Mollow spectrum at the different (from the probe beam) direction is demonstrated.
Keywords: femtosecond spectroscopy, differential spectra, quantum dots, Stark effect, four-wave mixing, Mollow spectrum, dressed states
PACS: 78.20.Jq, 78.47.+p, 78.67.Hc