Figure 10
From: Cooperative Effects in the Photoluminescence of (In,Ga)As/GaAs Quantum Dot Chain Structures
a The ratio τ870/τ720 (symbols) of the τd(λdet) measured under quasi-resonant (λexc = 870 nm) and non-resonant (λexc = 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 I3/2(λ) spectrum (solid line). Such a behavior of the measured τd(λdet) under non-resonant and quasi-resonant conditions evidences the cooperative radiative QD coupling