Study on direct optically controlled frequency selective surface

Compared with traditional active frequency selective surface (AFSS), the direct optically controlled FSS (DOCFSS) has many advantages, but the research of DOCFSS is still in its infancy and faces many difficulties. This paper compares several semiconductor materials used in DOCFSS in the past, studies the corresponding semiconductor parameters, and determines that gallium arsenide (GaAs) is a potential semiconductor material for direct optically control. In addition, an important issue in DOCFSS is the design of the light-feeding system. This paper also discusses the LED light-feeding scheme including the focusing lens and the focusing plastic column, and the laser light-feeding scheme realized by optical fiber or micro lens array. Finally, the application of semiconductors in DOCFSS is studied.