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Design Considerations for Semiconductor Nanowire–Plasmonic Nanoparticle Coupled Systems for High Quantum Efficiency Nanowires
Author(s) -
Mokkapati Sudha,
Saxena Dhruv,
Tan Hark Hoe,
Jagadish Chennupati
Publication year - 2013
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201300312
Subject(s) - nanowire , plasmon , materials science , semiconductor , optoelectronics , quantum efficiency , nanoparticle , surface plasmon polariton , surface plasmon , nanotechnology , common emitter
The optimal geometries for reducing the radiative recombination lifetime and thus enhancing the quantum efficiency of III–V semiconductor nanowires by coupling them to plasmonic nanoparticles are established. The quantum efficiency enhancement factor due to coupling to plasmonic nanoparticles reduces as the initial quality of the nanowire increases. Significant quantum efficiency enhancement is observed for semiconductors only within about 15 nm from the nanoparticle. It is also identified that the modes responsible for resonant enhancement in the quantum efficiency of an emitter in the nanowire are geometric resonances of surface plasmon polariton modes supported at the nanowire/nanoparticle interface.