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• W2808586482 abstract "We explore the nature of the electroluminescence (EL) emission of purely n-doped GaAs/AlGaAs resonant tunneling diodes (RTDs) and the EL evolution with voltage. A singular feature of such a device is unveiled when the electrical output current changes from high to low and the EL on-off ratio is enhanced by 2 orders of magnitude compared to the current on-off ratio. By combining the EL and current properties, we are able to identify two independent impact ionization channels associated with the coherent resonant tunneling current and the incoherent valley current. We also perform the same investigation with an associated series resistance, which induces a bistable electrical output in the system. By simulating a resistance variation for the current-voltage and the EL, we are able to tune the EL on-off ratio by up to 6 orders of magnitude. We further observe that the EL on and off states can be either direct or inverted compared to the tunneling current on and off states. This electroluminescence, combined with the unique RTD properties such as the negative differential resistance (NDR) and high frequency operation, enables the development of high speed functional opto-electronic devices and optical switches." @default.
• W2808586482 created "2018-06-21" @default.
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• W2808586482 date "2018-08-01" @default.
• W2808586482 modified "2023-10-15" @default.
• W2808586482 title "Electroluminescence on-off ratio control of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi mathvariant=italic>n</mml:mi><mml:mtext mathvariant=italic>−</mml:mtext><mml:mi mathvariant=italic>i</mml:mi><mml:mtext mathvariant=italic>−</mml:mtext><mml:mi mathvariant=italic>n</mml:mi></mml:mrow></mml:math> GaAs/AlGaAs-based resonant tunneling structures" @default.
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• W2808586482 doi "https://doi.org/10.1103/physrevb.98.075302" @default.
• W2808586482 hasPublicationYear "2018" @default.
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