13 November 2014 Quantum-coherence-enhanced plasmonic nanostructures for near-field spectroscopy and control (presentation video)
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Quantum coherence has previously been used to enhance nonlinear optical signals such as coherent Raman scattering. Near field enhancement from plasmonic nanostructures can also dramatically improve Raman signals. We investigate quantum coherence effects in plasmonic nanostructures coupled to gain media to enhance the efficiency of surface plasmon generation. We simulate the dependence of surface-enhanced coherent anti-Stokes Raman scattering (SECARS) spectra on the position and line width of the surface plasmon resonance, and attribute small (and even negative) enhancement factors to local destructive interference. We report measurements of nanoscale phase effects in SECARS of pyridazine on gold nanoparticle aggregates, and propose strategies to increase enhancement factors towards theoretical predictions.
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Dmitri V. Voronine, Dmitri V. Voronine, "Quantum-coherence-enhanced plasmonic nanostructures for near-field spectroscopy and control (presentation video)", Proc. SPIE 9163, Plasmonics: Metallic Nanostructures and Their Optical Properties XII, 916325 (13 November 2014); doi: 10.1117/12.2062428; https://doi.org/10.1117/12.2062428

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