Ultrafast Interferometric Investigation of Resonant Secondary Emission from Quantum Well Excitons
23 May 1999
We present the first direct investigation of the coherence properties of resonant secondary emission (RSE) from quantum well exciton. Using ultrafast spectral interferometry, or TADPOLE, we measure spectral fringes that are resonantly enhanced at the exciton transitions. The fringe formation is due to the coherent Rayleigh component of the RSE, and allows us to investigate the dynamics of high-contrast from excitons and show for the first time the non-ergodic nature of the RSE.