Mechanically Flexible and Optically Tunable Organic Crystal Resonator

An organic single‐crystal optical resonator that maintains its optical performance even upon mechanical bending remains a challenging target. Here, the first flexible organic crystal (FOC) that works as a tunable optical resonator as a function of bending angle is developed. A fluorescent π‐conjugated molecule, cyano‐substituted oligo(phenylenevinylene)s, is allowed to crystallize slowly, yielding a discrete rod‐shape microcrystal (FOC COPV )....