| abstract |
(57) [Problem] To provide an optical sensor element having an optical modulation function. An optical sensor element that modulates and outputs incident light according to a measurement voltage. The optical sensor element includes a waveguide layer 24 including a core portion 2 for guiding the incident light, 4 on both sides of the substrate 20 holding the waveguide layer 24, And a pair of electrodes 4u and 4d opposed to each other so as to apply the measurement voltage to the core portion. The core part 24 Is formed of a polymer material whose refractive index changes due to an electromagnetic field, and the change shows optical nonlinearity. |