To unlock the widespread use of block copolymers as photonic pigments, there is an urgent need to consider their environmental impact (cf. microplastic pollution). Here we show how inverse glass architecture can enable biocompatible bottlebrush (BBCPs), which otherwise lack refractive index contrast needed for a strong response. A library pigments produced from poly(norbornene-graft-polycaprola...

The full optical control of light using sustainable green technologies is one the incipient challenges Photonics community. There are, however, few materials able to provide a significant nonlinear refractive index change under small enough intensities (< 1 GW cm−2), and, more importantly, allowing external magnitude and sign their response. This manuscript demonstrates that Cs2SnI6 lead-free n...