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Molecular plasmonics has been a hot topic for the past several years. At the heart of the primary interest in
plasmonics is the strong electromagnetic field localization at resonant frequencies corresponding to surface
plasmon-polariton modes. Thanks to riveting advancements in nanofabrication technologies, we have achieved
nearly 1 nm spatial resolution (and in some cases even below that!) and are able to fabricate a wide variety of
nanosystems ranging from nanoparticles of various shapes to metasurfaces comprised of periodic arrays of
nanoparticles and/or nanoholes of any imaginable geometry. Such systems have recently emerged as new
platforms for strong light-matter interactions. Combined with molecular ensembles, these constructs exhibit a
remarkable set of optical phenomena ranging from the exciton-plasmon strong
coupling to the second harmonic generation altered by molecular resonances. In this talk I will discuss both
linear and nonlinear optical properties of plasmonic materials coupled to quantum emitters of various
complexity. I will also introduce a newly developed computational approach that can be used to efficiently
simulate a large number of complex molecules driven by electromagnetic radiation crafted at plasmonic
interfaces.