INTEGRATED HIGH-EXTINCTION RATIO INFRARED CIRCULAR POLARIZATION DETECTOR AND DESIGN METHOD

摘要

Disclosed are an integrated high-extinction ratio infrared circular polarization detector and a design method; the structure of the detector comprises a metal reflective layer, a lower electrode layer, a quantum well layer, an upper electrode layer and a two-dimensional chiral metamaterial layer. Under the incidence of a certain optical rotation, surface plasmons are formed on the interface between the metamaterial layer and the quantum well layer, and the main electrical field direction coincides with the absorption direction of the quantum well, thus the absorption of the quantum well is enhanced. Under the incidence of another optical rotation, most of the optical power is reflected, surface plasmons can not be effectively excited, and the absorption of the quantum well is very low, thus the detection capabilities for a high extinction ratio of infrared circular polarization are achieved.