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Photoluminescence plasmonic enhancement in InAs quantum dots coupled to gold nanoparticles
Authors:Jiang Wu  Seungyong Lee  V.R. Reddy  M.O. Manasreh  B.D. Weaver  M.K. Yakes  C.S. Furrow  Vas.P. Kunets  M. Benamara  G.J. Salamo
Affiliation:1. Department of Electrical Engineering, 3217 Bell Engineering Center, University of Arkansas, Fayetteville, AR 72701, USA;2. Naval Research Laboratory, Code 6816, 4555 Overlook Ave, SW, Washington DC 20375, USA;3. Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA;1. Institute of Physics, University of Tartu, W. Ostwaldi st. 1, 50411 Tartu, Estonia;2. A.M. Prokhorov General Physics Institute, 38 Vavilov st., 119991 Moscow, Russia;1. Faculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University, Lojasiewicza 11, 30-348 Kraków, Poland;2. National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Czerwone Maki 98, PL-30392 Kraków, Poland;1. The Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai 200072, PR China;2. Institute of Biomedical Engineering, Shanghai University, Shanghai 200072, PR China;1. Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea;2. Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, UK;3. Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea;4. Department of Electrical & Computer Engineering, The Ohio State University, Columbus, OH 43210, USA
Abstract: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.
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