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Abstract
In the past half-century, surface plasmon resonance in noble metallic nanoparticles has been an important research subject. Recent advances in the synthesis, assembly, characterization, and theories of traditional and non-traditional metal nanostructures open a new pathway to the kaleidoscopic applications of plasmonics. However, accurate and precise models of plasmon resonance are still challenging, as its characteristics can be affected by multiple factors. We herein summarize the recent advances of plasmonic nanoparticles and their applications, particularly regarding the fundamentals and applications of surface plasmon resonance (SPR) in Au nanoparticles, plasmon-enhanced upconversion luminescence, and plasmonic chiral metasurfaces.
Highlights
Surface plasmon resonance (SPR) is the interaction between electromagnetic fields and free electrons in metals
We summarize the recent research progress and achievements on localized surface plasmon resonance (LSPR), including: (1) fundamentals and applications of LSPR in Au NPs, (2) plasmon enhanced upconversion luminescence, and (3) plasmonic chiral metasurfaces
For specific NP assembly geometries, which are typically associated with well-defined NP disposition and homogeneous nanometric gaps between particles, the mutual interaction between plasmon oscillations can originate constructive and destructive interference phenomena yielding to asymmetric LSPR band shapes, and sharp dips or spikes in the optical extinction spectrum, which are known as Fano resonances [24]
Summary
Surface plasmon resonance (SPR) is the interaction between electromagnetic fields and free electrons in metals. The other one is the localized surface plasmon resonance (LSPR), which is confined in a very small volume around an isolated nanoparticle/nanostructure. In both cases, the incident electromagnetic field can be localized at a deep subwavelength scale with a remarkable enhancement of the local field, leading to a broad range of applications in the fields of biology, chemistry, energy, and information [1,2,3,4,5,6,7]. We summarize the recent research progress and achievements on LSPR, including: (1) fundamentals and applications of LSPR in Au NPs, (2) plasmon enhanced upconversion luminescence, and (3) plasmonic chiral metasurfaces
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