Asynchronous Electric Field Vector Measurement Using EO Sensor in Millimeter Wave Band

We demonstrate the visualization of the spatial distribution of electric field vector components using an electro-optic (EO) sensor in millimeter (mm) wave band. The result of the proof-of-concept experiment shows the relative angle between the measured polarization direction and the propagation direction, which was determined from the phase front distribution, was 90.6 ± 0.8°. The vector components of the mm wave (77GHz) reflected by a metal plate were also measured to check the feasibility of the proposed measurement technique.