期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 92, 期 4, 页码 623-626出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00340-008-3141-0
关键词
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资金
- 973 Program of China [2006CB302900]
- National Natural Science Foundation of China [60778018]
The authors theoretically demonstrate the terahertz beam shaping with metallic subwavelength holes array surrounded by concentric periodic grooves. High transmission and directional radiation can be obtained simultaneously for the resonant excitation of the surface wave in the combined structure. Finite-difference time-domain simulation results shows that the transmission mainly depends on the lattice constant of hole array and the features of incident surface around it, while the far-field angle distribution is dominated by the details of the output surface. This compact beam shaping structure is hoped to serve as a basic device for future terahertz systems.
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