| Autor: |
Kobecki M; Experimentelle Physik 2, Technische Universität Dortmund, D-44227 Dortmund, Germany., Scherbakov AV; Experimentelle Physik 2, Technische Universität Dortmund, D-44227 Dortmund, Germany., Kukhtaruk SM; Experimentelle Physik 2, Technische Universität Dortmund, D-44227 Dortmund, Germany.; Department of Theoretical Physics, V.E. Lashkaryov Institute of Semiconductor Physics, 03028 Kyiv, Ukraine., Yaremkevich DD; Experimentelle Physik 2, Technische Universität Dortmund, D-44227 Dortmund, Germany., Henksmeier T; Department Physik, Universität Paderborn, 33098 Paderborn, Germany., Trapp A; Department Physik, Universität Paderborn, 33098 Paderborn, Germany., Reuter D; Department Physik, Universität Paderborn, 33098 Paderborn, Germany., Gusev VE; Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique-Graduate School (IA-GS), CNRS, Le Mans Université, Le Mans, France., Akimov AV; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom., Bayer M; Experimentelle Physik 2, Technische Universität Dortmund, D-44227 Dortmund, Germany. |
| Abstrakt: |
The functionality of phonon-based quantum devices largely depends on the efficiency of the interaction of phonons with other excitations. For phonon frequencies above 20 GHz, generation and detection of the phonon quanta can be monitored through photons. The photon-phonon interaction can be enormously strengthened by involving an intermediate resonant quasiparticle, e.g., an exciton, with which a photon forms a polariton. In this work, we discover a giant photoelasticity of exciton-polaritons in a short-period superlattice and exploit it to detect propagating acoustic phonons. We demonstrate that 42 GHz coherent phonons can be detected with extremely high sensitivity in the time domain Brillouin oscillations by probing with photons in the spectral vicinity of the polariton resonance. |
