High photo-excited carrier multiplication by charged InAs dots in AlAs/GaAs/AlAs resonant tunneling diode
Wangping Wang, Ying Hou, Dayuan Xiong, Ning Li, Wei Lu
TL;DR
This paper introduces a highly sensitive photon detector using InAs quantum dots integrated into an AlAs/GaAs/AlAs resonant tunneling diode, achieving a carrier multiplication factor of 10^7 at 77K.
Contribution
The work demonstrates a novel photon detection approach with unprecedented carrier multiplication by combining quantum dot memory effects with resonant tunneling tuning.
Findings
Photon rate of 115 photons/sec induces 10nA photocurrent.
Carrier multiplication factor of 10^7 achieved.
Detection operates effectively at 77K.
Abstract
We present an approach for the highly sensitive photon detection based on the quantum dots (QDs) operating at temperature of 77K. The detection structure is based on an AlAs/GaAs/AlAs double barrier resonant tunneling diode combined with a layer of self-assembled InAs QDs (QD-RTD). A photon rate of 115 photons per second had induced 10nA photocurrent in this structure, corresponding to the photo-excited carrier multiplication factor of 10^7. This high multiplication factor is achieved by the quantum dot induced memory effect and the resonant tunneling tuning effect of QD-RTD structure.
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