Non-reciprocal resonant optomechanics in semiconductor nanostructures

by A. V. Poshakinskiy (Ioffe Institute, St. Petersburg, Russia)

Friday 5 Oct 2018, 15:00 → 16:00 Europe/Rome

Aula Cortini (Dip. di Fisica - Edificio E Fermi)

In semiconductor quantum wells, photoelastic interaction is increased by several orders of magnitude at the exciton resonance, making them promising for optomechanics. Under resonant laser pump, the exciton-mediated stimulated Raman scattering leads to controllable sound amplification or attenuation. At higher pump intensities, acoustic lasing can be realized. The eigen modes of the system are phonoritons, i.e., a hybrid of phonons, photons, and excitons. Phonoritons have non-reciprocal dispersion, leading to strong asymmetry of light and sound transmission coefficients.