Fig. 1: Bose–Einstein condensate optomechanical induced amplification. | Nature Communications

Fig. 1: Bose–Einstein condensate optomechanical induced amplification.

From: Polariton-driven phonon laser

Fig. 1

a, b Photoluminescence (PL) color maps of exciton–polaritons confined in a 40-μm-wide stripe. The two spatial images were recorded for nonresonant excitation powers well below (a, PPump = 10−4 PTh) and above (b, PPump = 2.3 PTh) the condensation threshold power PTh. c Color map of the spectral PL dependence on the probe laser energy. d The integrated PL intensity. e The emission amplitude of the fundamental BEC state as a function of the probe laser energy. The arrows highlight the peaks corresponding to the OMIA processes. Their energies as a function of the peak order are displayed in f.

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