Nanoplasmonics deals with collective electron dynamics on the surfaces of metal nanostructures, which arises due to
excitations called surface plasmons. The surface plasmons localize and concentrate optical energy in nanoscopic regions
creating highly enhanced local optical fields.
Nanoplasmonic fields are also ultrafast: changing on the femtosecond or even attosecond scale. Fundamentals of
surface plasmonics will be discussed. The properties of the surface plasmons and their local fields are in the foundation
of the numerous applications of nanoplasmonics to science, technology, environmental monitoring, biomedicine, and
defense. A brief review of some of these applications will be given. We will discuss in more detail some of these
applications: biomedical diagnostics including detection of pathogenic viruses, cancer theranostics, single molecule
spectroscopy, and detection of explosives using the spaser (surface plasmon amplification by stimulated emission of
radiation).
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