Journal
MATERIALS LETTERS
Volume 65, Issue 23-24, Pages 3605-3608Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2011.08.019
Keywords
Photoluminescence; Surface plasmon; Quantum dot
Funding
- Air Force Office of Scientific Research [FA9550-10-1-0136]
- NSF-EPSCoR [EPS-1003970]
- NSF-SURF-EPSCoR [0024]
- Naval Research Office
- Office Of The Director
- EPSCoR [1003970] Funding Source: National Science Foundation
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Photoluminescence enhancement due to dipole field from gold nanoparticles was observed at 77 K for GaAs capped InAs quantum dots. The gold nanoparticles were coupled to the surface of the cap layer by using dithiol ligands. The enhancement was investigated as a function of the GaAs capped layer thickness. An order of magnitude enhancement in the emission was observed in samples with a cap thickness of 12 nm. This enhancement however is drastically decreased in samples with a cap thickness of 200 nm. The observed enhancement is interpreted in terms of photon scattering from the large dipole scattering cross section. (C) 2011 Elsevier B.V. All rights reserved.
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