Fig. 2: X0 switching under single-colour dual excitation.
From: All optical switching of a single photon stream by excitonic depletion
a Experimental time resolved photoluminescence under combined 790 nm continuous wave (cw) and 790 nm pulsed laser excitation. In each panel the mean power of the cw laser is increased from 0 (orange lines) to 500 nW (blue lines). Intermediate cw laser powers (30, 60, 100, 140 and 200 nW) are represented with grey lines. The mean power of the pulsed laser increases from the bottom panels to the top panels, corresponding to 10, 33, 50 and 125 nW. b Population probability from the model simulation for the same pumping conditions. c, d Schematic representation of the single-colour, dual-excitation switching proposal with high and low pulsed laser power. c shows the situation where the switcher is operated in its enabled state, and d shows the situation where the switcher is in the disabled state. e Experimental time resolved photoluminescence measurements with the switcher enabled (i) (cw mean power = 200 nW and pulsed mean power = 125 nW) and disabled (ii) (cw mean power = 200 nW and pulsed mean power = 10 nW). f Model simulation for the same parameters in e.
