作者
Martin F Volk, Benjamin Reinhard, Jens Neu, René Beigang, Marco Rahm
发表日期
2013/6/15
期刊
Optics Letters
卷号
38
期号
12
页码范围
2156-2158
出版商
Optica Publishing Group
简介
We designed and implemented a gradient index metasurface for in-plane focusing of confined terahertz (THz) surface waves. We measured the spatial propagation of the surface waves by two-dimensional mapping of the complex electric field using a THz near-field spectroscope. The surface waves were focused to a diameter of 500 μm after a focal length of approximately 2 mm. In the focus, we measured a field amplitude enhancement of a factor of 3.
学术搜索中的文章
MF Volk, B Reinhard, J Neu, R Beigang, M Rahm - Optics Letters, 2013