Terahertz Quadruple-Band Switching Polarization Converter Based on HEMT - Embedded Net-Grid Metasurface

Abstract

A reflective polarization converter with HEMT -embedded net-grid metasurface is demonstrated here. The polarizer can convert a linearly polarized (LP) wave to its cross-polarized wave at four resonant frequencies with a high polarization conversion ratio, and it can convert the LP wave to a circularly polarized (CP) wave at the other eight resonant frequencies. The novel polarization converter may greatly benefit potential applications in terahertz ultrafast polarization manipulation.