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Evidence of Periodic Electric Fields Generated by Spatial Separation of Photogenerated Electron-Hole Pairs in Short-Period InAs/GaSb Type-II Superlattices
Under relatively high pump intensities, photoluminescence intensities across the miniband were greatly reduced, which was attributed to the existence of periodic electric fields caused by spatially-separated photogenerated electrons and holes in short-period type-II InAs/GaSb superlattices.