Non-linear optics on an exciton state in a single quantum dot

Romain Melet , Roger Grousson (1) , Valia Voliotis (1) , Xue-Lun Wang

1 INSP - Institut des Nanosciences de Paris

We report on non-linear effects on the exciton ground state in a single quantum dot, driven by a strong resonant optical field. The resonant excitation is achieved by embedding the quantum dots in a waveguiding structure. Thus, the light-matter coupling is enhanced, allowing the observation of Rabi oscillations up to three periods. With increasing pulse area, a decrease of the exciton lifetime is observed leading to a very rapid damping of the oscillations amplitude. Resonant coherent control experiments show that the coherence time of the ground exciton state in a single quantum dot is fast, of the order of a few tens of picoseconds.

Domaines: Matière Condensée [cond-mat]

Romain Melet, Roger Grousson, Valia Voliotis, Xue-Lun Wang. Non-linear optics on an exciton state in a single quantum dot. physica status solidi (b), 2008, 245 (6), pp.1098-1101. ⟨10.1002/pssb.200777609⟩. ⟨hal-01287860⟩