Published January 1, 2016
| Version v1
Journal article
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Fluorescence excitation by enhanced plasmon upconversion under continuous wave illumination
Creators
- 1. Hacettepe Univ, Inst Nucl Sci, TR-06800 Ankara, Turkey
- 2. Karlsruhe Inst Technol, DFG Ctr Funct Nanostruct, Wolfgang Gaede Str 1, D-76131 Karlsruhe, Germany
- 3. Koc Univ, Dept Phys, TR-34450 Istanbul, Sariyer, Turkey
Description
We demonstrate effective background-free continuous wave nonlinear optical excitation of molecules that are sandwiched between asymmetrically constructed plasmonic gold nanoparticle clusters. We observe that near infrared photons are converted to visible photons through efficient plasmonic second harmonic generation. Our theoretical model and simulations demonstrate that Fano resonances may be responsible for being able to observe nonlinear conversion using a continuous wave light source. We show that nonlinearity enhancement of plasmonic nanostructures via coupled quantum mechanical oscillators such as molecules can be several orders larger as compared to their classical counterparts. (C) 2016 Elsevier B.V. All rights reserved.
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