Abstract

The ability to grow high-quality semi-insulating quantum wells that have both sharp excitonic spectra and ultrafast carrier lifetimes has been an elusive goal. For instance, low-temperature-growth (LTG) GaAs has attracted significant recent attention as a marketable ultrafast subpicosecond photoconductor. However, investigators concluded that excitons in low-temperature- growth multiple quantum wells (MQW) are too severely broadened for any applicable use.1

© 1995 Optical Society of America

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