Figure 10.

a The ratio τ₈₇₀/τ₇₂₀ (symbols) of the τ_d(λ_det) measured under quasi-resonant (λ_exc = 870 nm) and non-resonant (λ_exc = 720 nm) excitations. The strongest change is seen just in the vicinity of the maximum of the normalized PL spectrum (solid line). b Normalized dependence (symbols) and normalized I^3/2(λ) spectrum (solid line). Such a behavior of the measured τ_d(λ_det) under non-resonant and quasi-resonant conditions evidences the cooperative radiative QD coupling