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Planar microcavities with distributed Bragg reflectors (DBRs) host, besidesconfined optical modes, also mechanical resonances due to stop bands in thephonon dispersion relation of the DBRs. These resonances have frequencies inthe sub-terahertz (10E10-10E11 Hz) range with quality factors exceeding 1000.The interaction of photons and phonons in such optomechanical systems can bedrastically enhanced, opening a new route toward manipulation of light. Here weimplemented active semiconducting layers into the microcavity to obtain avertical-cavity surface-emitting laser (VCSEL). Thereby three resonantexcitations -photons, phonons, and electrons- can interact strongly with eachother providing control of the VCSEL laser emission: a picosecond strain pulseinjected into the VCSEL excites long-living mechanical resonances therein. As aresult, modulation of the lasing intensity at frequencies up to 40 GHz isobserved. From these findings prospective applications such as THz lasercontrol and stimulated phonon emission may emerge.

Controlled lasing from active optomechanical resonators