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Efficiency of spin ...
Efficiency of spin injection in novel InAs quantum dotstructures: exciton vs. free carrier injection
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- Beyer, Jan, 1980- (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Buyanova, Irina A (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Suraprapapich, Suwaree (author)
- Dept of Electrical and Computer Engineering, University of California at San Diego, La Jolla, USA
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- Tu, Charles W (author)
- Dept of Electrical and Computer Engineering, University of California at San Diego, La Jolla, USA
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- Chen, Weimin (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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(creator_code:org_t)
- 2010-09-20
- 2010
- English.
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Series: Journal of Physics: Conference Series, 1742-6596 ; 245
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Unambiguous experimental evidence for a significant difference in efficiency of excitonic vs. free carrier spin injection is provided in novel laterally arranged self-assembled InAs/GaAs quantum dot structures, from optical orientation and tunable laser spectroscopy. A lower efficiency of exciton spin injection as compared to free carrier spin injection from wetting layers into QDs results in a distinct feature in luminescence polarization of the QDs as a function of excitation photon energy. It is shown that this difference is not related to carrier density and state-filling effects arising from the difference in optical absorption efficiency between the excitons and free carriers. Rather, it is a genuine property for exciton spin injection that suffers stronger spin relaxation due to Coulomb exchange interaction.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Semiconductor physics
- Halvledarfysik
Publication and Content Type
- ref (subject category)
- kon (subject category)
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