title: Cooperative coupling of cyanine and tictoid twisted π-systems to amplify organic chromophore cubic nonlinearities.
abstract: We report a new class of hybrid π-electron chromophores with a large, sign-tunable third-order nonlinear optical (NLO) response, achieved via cooperative coupling of cyanine dye bond-length alternation effects with the rich density of states in zwitterionic twisted π-system chromophores. A combined synthetic, linear/nonlinear spectroscopic, and quantum chemical study reveals exceptional third-order response exceeding the sum of the individual chromophore contributions.
authors: †Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States.
authors: Yanrong
authors: Y
authors: Shi
authors: †Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States.
authors: Alexander J-T
authors: AJ
authors: Lou
authors: ‡The Institute for Lasers, Photonics and Biophotonics, State University of New York at Buffalo, Buffalo, New York 14260, United States.
authors: Guang S
authors: GS
authors: He
authors: ‡The Institute for Lasers, Photonics and Biophotonics, State University of New York at Buffalo, Buffalo, New York 14260, United States.
authors: Alexander
authors: A
authors: Baev
authors: §Department of Chemical and Biological Engineering, State University of New York at Buffalo, Buffalo, New York 14260, United States.
authors: Mark T
authors: MT
authors: Swihart
authors: ‡The Institute for Lasers, Photonics and Biophotonics, State University of New York at Buffalo, Buffalo, New York 14260, United States.|∥Department of Chemistry, Korea University, Seoul 136-701, Korea.
authors: Paras N
authors: PN
authors: Prasad
authors: †Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States.
authors: Tobin J
authors: TJ
authors: Marks