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Effects of proton i...
Effects of proton irradiation on luminescence emission and carrier dynamics of self-assembled III-V quantum dots
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Leon, R. (författare)
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- Marcinkevicius, Saulius (författare)
- KTH,Mikroelektronik och informationsteknik, IMIT
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Siegert, J. (författare)
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Cechavicius, B. (författare)
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Magness, B. (författare)
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Taylor, W. (författare)
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Lobo, C. (författare)
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(creator_code:org_t)
- 2002
- 2002
- Engelska.
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Ingår i: IEEE Transactions on Nuclear Science. - 0018-9499 .- 1558-1578. ; 49:6, s. 2844-2851
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- The effects of proton irradiation (1.5 MeV) on photoluminescence intensities and carrier dynamics were compared between III-V quantum dots and similar quantum well structures. A significant enhancement in radiation tolerance is seen with three-dimensional (3-D) quantum confinement.. Measurements were carried out in different quantum dot (QD) structures, varying in material (InGaAs/GaAs and InAlAS/AlGaAS), QD surface density (4 x 10(8) to 3 x 10(10) cm(-2)), and substrate orientation [(100) and (311) B]. Similar trends were observed for all QD samples. A slight increase in PL emission after low to intermediate proton doses, are also observed in InGaAs/GaAs (100) QD structures. The latter is explained in terms of more efficient carrier transfer from the wetting layer via radiation-induced defects.
Nyckelord
- carrier dynamics
- compound semiconductors
- displacement damage
- photoluminescence
- Stranski-Krastanow quantum dots
- enhanced radiation hardness
- light-emitting-diodes
- deep levels
- gaas
- damage
- lasers
- transformation
- dependence
- wells
- degradation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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