Rabi Oscillations in a Single Self-Assembled Quantum Dot: The Effect of Detuning

Kenta Asakura, Yasuyoshi Mitsumori, Hideo Kosaka +5 more

Abstract We report the excitonic Rabi oscillations in self assembled quantum dots observed by photon echo spectroscopy. The amplitude of the observed Rabi oscillations increases with the pulse area, which is different from the results of previous reports. A numerical calculation of the Rabi oscillations including the local field effect in a quantum dot well reproduces the experimental oscillations, indicating that the local field effect is one of the important origins of the modification of the Rabi oscillations in quantum dots (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Gregory Ya. Slepyan, С. А. Максименко, A. Magyarov +2 more

Dmitri S. Mogilevtsev, A.P. Nisovtsev, S. Ya. Kilin +3 more

Kenta Asakura, Yasuyoshi Mitsumori, Hideo Kosaka +5 more

We experimentally studied the excitonic Rabi oscillations in self-assembled semiconductor quantum dots using two-pulse photon echo spectroscopy. We observed the change in the shape of the Rabi oscillations by the second pulse intensity. Our experimental results were systematically reproduced by numerical calculations taking into account the local field effect arising from the Coulomb interaction between photoinduced charge densities in a quantum dot. Our experimental findings indicated that the local field effect contributes considerably to the coherent optical responses of the excitons in quantum dots.

Han Htoon, D. Kulik, Chih-Kang Ken Shih +3 more

Summary form only given. We present direct experimental evidence of Rabi oscillation (RO) in individual self-assembled quantum dots (SAQDs) and experimental observation of a new quantum interference (QI) phenomenon. Our detailed theoretical investigations attribute this phenomenon to the coherent dynamics resulting from the interplay between RO and QI. We conduct experiments on an In/sub 0.5/Ga/sub 0.5/As SAQD, which can be considered as a three level system To study the interplay of RO and QI, we perform single dot wavepacket interferometry measurements in the strong excitation regime.

Junko Ishi‐Hayase, Kouichi Akahane, Y. Yamamoto +3 more