Multiple directional beaming effect of metallic subwavelength slit surrounded by periodically corrugated grooves.
It is demonstrated that multiple directional beaming effect can be realized by a metallic subwavelength slit surrounded by finite number of grooves based on mode expansion method. Each of the directional beaming is formed by superimposing two diffraction orders of spoof surface plasmon excited on the two corrugated sides of the slit. This delivers high contrast and considerably uniform energy distribution for the beaming directions.
State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, P. R. China
Yugang
Y
Liu
Haofei
H
Shi
Changtao
C
Wang
Chunlei
C
Du
Xiangang
X
Luo
D003198:Computer Simulation; D008027:Light; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
D008670:Metals