Abstract
We measure picosecond time resolved luminescence spectra in GaAs quantum wells using frequency upconversion luminescence spectroscopy. A careful line-shape analysis of the spectra is performed to separate the free exciton and free carrier related luminescence. From the time evolution of the free carrier luminescence, we deduce the characteristic time constant (${\mathrm{\ensuremath{\tau}}}_{\mathit{f}}$) for the bimolecular process of exciton formation by free electron-hole pairs. For an estimated initial carrier density of 4\ifmmode\times\else\texttimes\fi{}${10}^{10}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}2}$, ${\mathrm{\ensuremath{\tau}}}_{\mathit{f}}$ is found to be 50 ps. \textcopyright{} 1996 The American Physical Society.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
