Investigation shows high second harmonic generation in chiral polybinaphthalenes using femtosecond laser pulses, indicating potential in nonlinear photonics.
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 matching process, and the material's robust chiral structure leads to high optical activity observed via lock-in amplifier detection. In conclusion, the conjunction of high SHG values and optical activity of these supramolecular structures makes them excellent candidates for chiral photonics applications.
No takes yet. Share an insight, caveat, or question.
Santos et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: