#A phonon laser: Coherent vibrations from a self-breathing resonator
“#A phonon laser: Coherent vibrations from a self-breathing resonator” Figure 1. (a) Polariton BEC and phonon lasing of a microstructured trap in a semiconductor microcavity. (b) BEC emission under low (the lower curve) and high (the upper curve) particle densities, displaying phonon sidebands separated by the phonon energy ℏω_a . Credit: PDI and Instituto Balseiro…