Location: Applied Physics Building, Room 200
ABSTRACT
Plasmonic nanoantennas can concentrate light beyond the diffraction limit and create highly enhanced local fields, leading to increased Raman scattering and, in some cases, increased fluorescence from nanoscale emitters. Gold bowtie nanoantennas provide a highly enhancing structure that is more controllable and amenable to integration than other geometries such as sharp metal tips and colloids. We have enhanced a single molecule's fluorescence by a factor of 1,300 by coupling it to a bowtie nanoantenna, ten times higher than previously reported for any other plasmonic structure. Electromagnetic simulations reveal that this enhancement is a result of greatly increased absorption of light as well as a shortened excited state lifetime, leading to enhancement of the intrinsic quantum efficiency by an estimated factor of nine, despite additional non-radiative ohmic losses. Measurements of enhanced single-molecule fluorescence for molecules both in rigid polymers and in solution show that bowtie nanoantennas can be used for high-contrast selection of single nanoemitters in crowded environments.
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1 comment:
I think, you are right about the subject and your ideas are worth using and unique. Keep up the good work and I would be looking forward for such useful information on dissertation in future as well. Warm regards
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