From Nature to Optical Nonlinearity: Ultrafast Photophysics of Biogenic Dyes, Alizarin, and Cochineal.
Natural dyes such as alizarin and cochineal are gaining renewed attention as sustainable alternatives to synthetic chromophores with promising nonlinear optical (NLO) properties. Here, we present a systematic study of their linear and NLO responses in both solution and solid-state environments. Steady-state absorption...