Light-Induced Manipulation of Circularly Polarized Luminescence Color and Intensity via the Photonic Bandgap Effect.

ABSTRACT: The development of smart circularly polarized luminescence (CPL) systems with dynamically tunable emission properties presents both a significant challenge and a compelling opportunity in advanced photonics. Herein, we report a light-responsive CPL system fabricated by dispersing achiral Coumarin 6 and a photochromic spiropyran derivative within a self-organized chiral nematic liquid crystal (N*-LCs) matrix. The regular helical superstructure of the N*-LCs host not only induces the emergence of pronounced CPL signals from the achiral dopants but also provides a photonic bandgap (PBG). Through the efficient Förster resonance energy transfer (FRET) process from the donor Coumarin 6 to the photoisomerized merocyanine form of the acceptor, the CPL emission is reversibly switched from green to

SUBMITTER: Meng L 

PROVIDER: S-EPMC12824803 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature