2003/12/08 by S. Kundermann, Stefan Kundermann, M. Saba +12
Engineering · Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #Mechanical and Optical Resonators #Strong Light-Matter Interactions #Thermal Radiation and Cooling Technologies #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/0312205
5 pages, 4 figures
arxiv created 2003/12/08 · openalex publication_date 2003/12/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We measured the dynamics of polariton parametric stimulated scattering in semiconductor microcavities, by time-resolving the amplified signal with 250 fs resolution. Our experiments demonstrate that the stimulation process is considerably delayed with respect to the arrival time of both probe and pump pulses. This effect is clearly observable in our high quality sample due to the long lifetime of the microcavity polaritons (about 10 ps), and it is in excellent agreement with the model describing the coherent conversion of two pump polaritons into a signal-idler pair. We demonstrate that the non-instantaneous character of the polariton stimulation occurs because the polariton-wave amplification requires the build up of correlated signal-idler polariton fields.