Gradient index devices for terahertz waves and terahertz surface waves

被引：0
作者：
Volk, M. [1 ,2 ]
Fip, T. [1 ,2 ]
Neu, J. [1 ,2 ]
Hoeh, M. [1 ,2 ]
Reinhard, B. [1 ,2 ]
Beigang, R. [2 ,3 ]
Rahm, M. [1 ,2 ]
机构：
[1] Univ Kaiserslautern, Dept Elect & Comp Engn, Erwin Schroedinger Str, D-67663 Kaiserslautern, Germany
[2] Univ Kaiserslautern, Res Ctr OPTIMAS, D-67663 Kaiserslautern, Germany
[3] Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany
来源：
TERAHERTZ EMITTERS, RECEIVERS, AND APPLICATIONS IV | 2013年 / 8846卷
关键词：
meta-surfaces; terahertz integrated circuits; terahertz metamaterials; designer surface plasmon polaritons; gradient index devices; PLASMON POLARITONS; METAMATERIAL FILM;
D O I：
10.1117/12.2025399
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We demonstrate a variety of gradient index (GRIN) devices for both freely propagating terahertz waves and terahertz surface waves. As a specific example of a static GRIN optics we experimentally investigated and measured the optical properties of a GRIN beam deflector. We measured a maximum deflection angle of 6 deg. The thickness of the beam deflector was only about 100 mu m which is sub-wavelength at a frequency of 1.3 THz. Furthermore, we specifically designed meta-surfaces that support strongly confined terahertz surface waves. We show that the surface waves can be deliberately guided within the plane of propagation by use of GRIN structures. For example, we evidenced the focusing behavior of a meta-surface GRIN lens by near-field mapping of the terahertz field.
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页数：7
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