Abstract
A single-layer broadband polarizer has been designed for operating in the telecommunication wavelength band. The rigorous coupled-wave analysis (RCWA) is applied to study the optical spectrum for the optimized structure. High polarization efficiency, high extinction ratio with a broad wavelength range (1.45–1.75μm) are obtained. Both of the transmission efficiencies of TM-polarization and reflection efficiencies of TE-polarization are over 95%. The extinction ratio of transmission is over 30dB in the 1.45–1.75μm wavelength range, and the value is 114dB for the central wavelength. The designed polarizer may lead to potential application in optical communication and infrared imaging polarimetry.
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