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Spatially resolved scanning tunneling luminescence on self-assembled InGaAs/GaAs quantum dots
Eindhoven University of Technology, The Netherlands.
Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-7104-7127
Eindhoven University of Technology, The Netherlands.
Eindhoven University of Technology, The Netherlands.
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2003 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 83, no 2, 290-292 p.Article in journal (Refereed) Published
Abstract [en]

Scanning-tunneling microscope induced luminescence at low temperature has been used to study the carrier injection into single self-assembled InGaAs/GaAs quantum dots. Electrons are injected from the tip into the dots, which are located in the intrinsic region of a p-i-n junction, and contain excess holes under typical operational conditions. Only a fraction (similar to4%) of the dots is found to be optically active under local electrical excitation. Spatial dependent measurements indicate a highly nonhomogeneous electron diffusion towards the dots. By analyzing the spatial dependence of individual peaks in the measured spectra, the contributions of individual dots to the total, multidot spectrum can be disentangled.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2003. Vol. 83, no 2, 290-292 p.
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-118217DOI: 10.1063/1.15887320ISI: 000184038900029OAI: diva2:813333
Available from: 2015-05-22 Created: 2015-05-22 Last updated: 2015-06-01

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Kemerink, Martijn
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Chemical and Optical Sensor SystemsThe Institute of Technology
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