Molecular nonlinear optics The early studies of nonlinear optics and materials focused on the inorganic solids. With the development of nonlinear optics, molecular optical properties were investigated, forming molecular nonlinear optics. The traditional approaches used in the past to enhance nonlinearities include extending chromophore π-systems, adjusting bond length alternation, inducing intramolecular charge transfer, extending conjugation in 2D, and engineering multipolar charge distributions. Recently, many novel directions were proposed for enhanced nonlinearity and light manipulation, including twisted chromophores, combining rich density of states with bond alternation, microscopic cascading of second-order nonlinearity, etc. Due to the distinguished advantages, molecular nonlinear optics have been widely used in the biophotonics field, including bioimaging, phototherapy, biosensing, etc.
Molecular nonlinear optics The early studies of nonlinear optics and materials focused on the inorganic solids With the development of nonlinear optics molecular optical properties were investigated forming molecular nonlinear optics The traditional approaches used in the past to enhance nonlinearities include extending chromophore π-systems adjusting bond length alternation inducing intramolecular charge transfer extending conjugation in 2D and engineering multipolar charge distributions Recently many novel directions were proposed for enhanced nonlinearity and light manipulation including twisted chromophores combining rich density of states with bond alternation microscopic cascading of second-order nonlinearity etc Due to the distinguished advantages molecular nonlinear optics have been widely used in the biophotonics field including bioimaging phototherapy biosensing etc