Broadband planar achromatic anomalous reflector based on dispersion engineering of spoof surface plasmon polariton

Planar reflectors are generally composed of non-uniform inclusions positioned on conducting sheet. Restricted by strongdispersion of the inclusions, the reflection of planar reflectors is usually chromatic. In this letter, we first obtain thedispersion relation for planar achromatic anomalous reflector (PAAR). Then, we propose to realize thedispersion relation based ondispersion engineering of spoofsurface plasmon polariton (SSPP). Metallic blades structure is proposed to achieve the lineardispersion response by tailoring the weakdispersion region of SSPP. 6 metallic blade structures are designed to compose the super cell of the PAAR. A prototype was fabricated and measured. Both the simulation and experiment results show that the PAAR can achieve an achromatic reflected angle of 49.3 ° in 10.7–11.7 GHz under normal incidence.

Source: Applied Physics Letters - November 21, 2016 Category: Physics Authors: Jie Yang, Jiafu Wang, Yongfeng Li, Zhuoluo Wang, Hongya Chen, Xinhua Wang and Shaobo Qu Source Type: research