Strong Second Harmonic Generation and Nonlinear Optical Activity in Chiral Supramolecular Polymers.

ABSTRACT: The growing demand for advanced optical materials has made nonlinear photonics a key area of research, particularly for developing new technologies. Therefore, this study focuses on chiral supramolecular structures, which are highly promising due to their exceptional second-order optical susceptibility (χ⁽²⁾) values. In particular, we investigated the origin and optical activity of second harmonic generation (SHG) in chiral polybinaphthalenes using femtosecond laser pulses. Our outcomes reveal a high χ⁽²⁾ value, up to 7 pm/V, influenced by the attached chromophores at the polymer backbone. Structural analysis showed rodlike/helical structures that promote directional preference for the SHG signal. Simulations unveil that the SHG process is connected to the quasi-phase

SUBMITTER: Dos Santos CHD 

PROVIDER: S-EPMC12746451 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature