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- W1567659124 abstract "We image the micro-electroluminescence (EL) spectra of self-assembled InAs quantum dots (QDs) embedded in the intrinsic region of a GaAs p-i-n diode and demonstrate optical detection of resonant carrier injection into a single QD. Resonant tunneling of electrons and holes into the QDs at bias voltages below the flat-band condition leads to sharp EL lines characteristic of individual QDs, accompanied by a spatial fragmentation of the surface EL emission into small and discrete light- emitting areas, each with its own spectral fingerprint and Stark shift. We explain this behavior in terms of Coulomb interaction effects and the selective excitation of a small number of QDs within the ensemble due to preferential resonant tunneling paths for carriers." @default.
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- W1567659124 date "2010-12-13" @default.
- W1567659124 modified "2023-10-16" @default.
- W1567659124 title "Optical Imaging of Electrical Carrier Injection into Individual InAs Quantum Dots" @default.
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- W1567659124 doi "https://doi.org/10.1103/physrevlett.105.257401" @default.
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