Controlling the flow of energy in a random medium is a research frontier with a wide range ofapplications. As recently demonstrated, the effect of disorder on the transmission of opticalbeams may be partially compensated by wavefront shaping, but losing control over individuallight paths. Here we demonstrate a novel physical effect whereby energy is spatially andspectrally transferred inside a disordered active medium by the coupling between individuallasing modes. We show that it is possible to transmit an optical resonance to a remote pointby employing specific control over optical excitations, obtaining a random lasing system,which acts both as a switch and as an amplifier.
展开▼
