Thermally stable poled polyquinoline thin film with very large electro‐optic response

Poled guest‐host polyquinoline thin films are shown to demonstrate both exceptionally large electro‐optic activity and long‐term stability. After an initial drop from 45 to 26 pm/V in the first 100 h, the electro‐optic coefficient r33 at 26 pm/V remained for more than 2000 h.