title: Optical Second Harmonic Generation in Plasmonic Nanostructures: From Fundamental Principles to Advanced Applications.
abstract: Plasmonics has emerged as an important research field in nanoscience and nanotechnology. Recently, significant attention has been devoted to the observation and the understanding of nonlinear optical processes in plasmonic nanostructures, giving rise to the new research field called nonlinear plasmonics. This review provides a comprehensive insight into the physical mechanisms of one of these nonlinear optical processes, namely, second harmonic generation (SHG), with an emphasis on the main differences with the linear response of plasmonic nanostructures. The main applications, ranging from the nonlinear optical characterization of nanostructure shapes to the optimization of laser beams at the nanoscale, are summarized and discussed. Future directions and developments, made possible by the unique combination of SHG surface sensitivity and field enhancements associated with surface plasmon resonances, are also addressed.
authors.affiliation: Nanophotonics and Metrology Laboratory (NAM), Swiss Federal Institute of Technology Lausanne (EPFL) , 1015 Lausanne, Switzerland.
authors.forename: Jérémy
authors.initials: J
authors.lastname: Butet
authors.affiliation: Institut Lumière Matière, UMR CNRS 5306, Université Claude Bernard Lyon , 69622 Cedex, Villeurbanne, France.
authors.forename: Pierre-François
authors.initials: PF
authors.lastname: Brevet
authors.affiliation: Nanophotonics and Metrology Laboratory (NAM), Swiss Federal Institute of Technology Lausanne (EPFL) , 1015 Lausanne, Switzerland.
authors.forename: Olivier J F
authors.initials: OJ
authors.lastname: Martin
keywords: nanoantenna; nanostructures; nonlinear optics; optical characterization; optics of metals; plasmonics; second harmonic generation; sensing; symmetry