Journal ArticleDOI
Numerical studies of the modification of photodynamic processes by film-coupled plasmonic nanoparticles
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TLDR
In this article, a method for numerically studying plasmonic enhancements in fluorescence and applying it to several variants of the film-coupled nanoparticle platform was proposed.Abstract:
The local plasmon resonances of metallic nanostructures are commonly associated with massive local field enhancements, capable of increasing the photoexcitation of nearby quantum emitters by orders of magnitude. However, these same plasmonic structures support high densities of bound and dissipative states, often quenching the nearby emitter or at least offering competitive nonradiative channels. Thus, finding a plasmonic platform that supports massive field enhancements and a high proportion of radiating to nonradiating states remains an active and promising area of research. In this paper, we outline a simple method for numerically studying plasmonic enhancements in fluorescence and apply it to several variants of the film-coupled nanoparticle platform. Film-coupled nanoparticles make excellent candidates for these investigations since the gap dimension between nanoparticle and film—key to the enhancement mechanism—can be precisely controlled in experimental realizations. By correlating the properties of embedded fluorophores with the resonances of the film-coupled nanoparticles, we show quantum yield engineering that is nearly independent of the fluorophore’s intrinsic quantum yield, yielding overall fluorescence enhancements of over four orders of magnitude.read more
Citations
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Journal ArticleDOI
Ultrafast spontaneous emission source using plasmonic nanoantennas.
Thang B. Hoang,Gleb M. Akselrod,Christos Argyropoulos,Jiani Huang,David R. Smith,Maiken H. Mikkelsen +5 more
TL;DR: The nanopatch antenna geometry can be tuned from the visible to the near infrared, providing a promising approach for nanophotonics based on ultrafast spontaneous emission and indicates a high radiative quantum efficiency of ∼50%.
Journal ArticleDOI
Large-Area Metasurface Perfect Absorbers from Visible to Near-Infrared.
Gleb M. Akselrod,Jiani Huang,Thang B. Hoang,Patrick T. Bowen,Logan Su,David R. Smith,Maiken H. Mikkelsen +6 more
TL;DR: An absorptive metasurface based on film-coupled colloidal silver nanocubes is demonstrated and the resonance can be tuned from the visible to the near-infrared.
Journal ArticleDOI
Leveraging Nanocavity Harmonics for Control of Optical Processes in 2D Semiconductors
Gleb M. Akselrod,Tian Ming,Christos Argyropoulos,Christos Argyropoulos,Thang B. Hoang,Yuxuan Lin,Xi Ling,David R. Smith,Jing Kong,Maiken H. Mikkelsen +9 more
TL;DR: This work shows a plasmonic nanocavity based on a nanopatch antenna design that has two tunable resonant modes in the visible spectrum separated by 350 nm and with line widths of ∼60 nm, and observes a 2000-fold enhancement in the PL intensity of MoS2 at room temperature.
Optical interactions in a plasmonic particle coupled to a metal film
TL;DR: The interplay between localized surface plasmon (LSP) and surface Plasmon-polariton (SPP) is studied in detail in a system composed of a three-dimensional gold particle located at a short distance from a gold thin film.
Proceedings Article
Spontaneous emission in the optical microscopic cavity
TL;DR: Results show evidence of ``SpE inhibition'' and ``enhancement,'' of nonexponential decay of SpE signals, and of competition with superradiance and stimulated emission, in all computer calculations of the optical parameters of the multilayered structures used for cavity confinement.
References
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Journal ArticleDOI
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