Second-order non-linear optical polymers

In this article we discuss the state of the art in the field of second-orde r non-linear optical polymers. More specifically, we highlight those result s that we think made an important contribution to the field, combined with some of our own results. We start with a general overview of all the aspect s involved in characterizing second-order nonlinear optical polymers, from thin film formation and poling to second-harmonic generation and electro-op tic measurements on such systems. Next, we review the second-order non-line ar optical properties of selected polymer systems such as poly(vinyl ether) s, polystyrenes, polymethacrylates, main-chain polymers and high T-g polyme rs like polyimides and polymaleimides. Finally we discuss some new polymer systems that might become in the field of non-linear optics in the near imp ortant future.