Mutual coupling of two semiconductor quantum dots via an optical nanocavity

Physical Review B - Condensed Matter and Materials Physics

Volumn 82, Issue 7, 2010, Pages

  Laucht, A ^a   Villas Boas J M ^a,b   Stobbe, S ^c   Hauke, N ^a   Hofbauer, F ^a   Bohm G ^a   Lodahl, P ^c   Amann, M C ^a   Kaniber, M ^a   Finley, J J ^a  

^a WALTER SCHOTTKY INSTITUT   (Germany)

^b FEDERAL UNIVERSITY OF UBERLÂNDIA   (Brazil)

^c TECHNICAL UNIVERSITY OF DENMARK   (Denmark)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77957606880     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.82.075305     Document Type: Article

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33. The triple peak observed here is different from the one observed in Ref.. It originates from the coherent coupling of three quantum states, not from charge fluctuations in the occupation of the QD levels.
34. Pumping of the cavity from nonresonant QDs was observed and investigated by different groups as Refs.. The exact mechanism is still topic of current research (Refs.).
35. For large detunings of the QDs from the cavity mode (Δ ≫ g i, γ i, γ c) it is also possible to adiabatically eliminate 〈 a 〉 from Eq., which gives us an effective coupling between the QD excitons g eff = g 1 g 2 / Δ ∼ 7.2 μ eV due to virtual photon transitions. Since this condition is not entirely fulfilled for our system (Δ ∼ 303 μ eV), the numerically extracted splitting of ∼ 10.3 μ eV does not exactly correspond to the splitting calculated from the adiabatic approximation ∼ 12.0 μ eV.
36. When the two QDs and the cavity mode are detuned from each other, the coupling is very weak. In this case, both models, the genuine model from Sec. and the model investigated here, will be equivalent.