Figure 1: Experimental configuration and switch on of the Address.
(a) Sketch of the experimental configuration: the exciting laser beam is directed with an angle on the microcavity sample and partially reflected from the front DBR. Polaritons are created within the microcavity plane and propagate with a finite velocity. The one-to-one coupling with the external photons allows the observation of the polariton propagation through the emitted intensity from the back side of the sample. (b) In the upper panel, the two-dimensional momentum space image of the emission under high excitation power shows the polariton states created by two laser beams impinging at different angles (KC and KA) and same energy. The lower panel shows the polariton dispersion along the direction corresponding to Ky=0 of the upper panel. The vertical lines indicate the value of KA=0.5 μm−1 and KC=−1 μm−1 and the horizontal line indicates the pumping energy E=1.481 eV. (c) The emission intensities of the address state are plotted for increasing powers of the exciting beam. The Address powers are measured from the laser before arriving on the microcavity sample. (d) Measurements of the hysteresis cycle around the threshold of panel (c). Black and red dots correspond to points of the onwards and backwards power changes, respectively, showing the absence of the hysteresis power-cycle.
