Absorptive and dispersive optical responses of excitons in a single quantum dot
Alén, B. · Högele, A. · Kroner, M. · Seidl, S. · Karrai, K. · Warburton, R. J. · Badolato, A. · Medeiros-Ribeiro, G. · Petroff, P. M.
Original · EN
We have determined both the real and imaginary parts of the dielectric polarizability of a single quantum dot. The experiment is based on the observation and the manipulation of Rayleigh scattering at photon frequencies near the resonance of an optical exciton transition in single self-assembled InAs and InGaAs quantum dots. The interference between the narrow-band laser field and the weak electromagnetic field coherently scattered by the quantum dot is detected with a cryogenic Fabry-Perot setup by combined differential transmission and reflectivity measurements.
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