Abstract-Artificial Birefringent Metallic Planar Structures for Terahertz Wave Polarization Manipulation

• Lei Wang, haifeng Hu, Haomin Song, Wei Zeng, Suhua Jiang, and Qiaoqiang Gan
• http://www.opticsinfobase.org/ol/upcoming_pdf.cfm?id=197426

• Abstract: We propose an artificial birefringent terahertz (THz) device constructed by subwavelength L-shaped hole arrays on a single metallic layer. This structure is able to work as a polarizer when the incident frequency is between the cutoff frequencies of two eigenmodes. When the incident wave is beyond cutoff frequencies of these two modes, it can be designed as an efficient half- or quarter-wave plate with extraordinary transmission properties. A big effective index difference from 0.254 to 0.768 is obtained using a subwavelength-thick planar structure, which can reduce the thickness of the device to one tenth of conventional quartz birefringent crystals for THz waves.