公开(公告)号：US20250036004A1

公开(公告)日：2025-01-30

申请号：US18697071

申请日：2022-09-30

Applicant: UNIVERSITEIT ANTWERPEN

Inventor： Wim WENSELEERS ,  Jochen CAMPO ,  Stein VAN BEZOUW ,  Valentina PIA ,  Valentina MANICI

IPC: G02F1/361 ,  C09K9/02 ,  G02F1/37

Abstract: A second-order nonlinear optical device, includes (i) an active layer and (ii) an electric field generator. The active layer includes a matrix material, and second-order nonlinear optical chromophores dispersed in the matrix material. Each chromophore has a conjugated system having at least a first nitrogen atom connected to a second nitrogen atom via a conjugated path and a positive charge localized on one of the nitrogen atoms. The chromophore is switchable between a first state in which the positive charge is localized on the first nitrogen atom and a second state in which the positive charge is localized on the second nitrogen atom, and under thermal equilibrium both states are populated. The electric field generator is for switching at least some of the chromophores from the first state to the second state or from the second state to the first state, or to reorient at least some of the chromophores.