Abstract
We study surface-plasmon-enhanced terahertz transmission through subwavelength metallic hole arrays of sub-skin-depth thickness. Dynamic evolution of surface-plasmon resonance in terms of array thickness is characterized by use of terahertz time-domain spectroscopy in the frequency range 0.1–4.5 THz. A critical thickness of lead array film is observed, above which surface-plasmon coupling of terahertz pulses begins and is enhanced rapidly as the array thickness is increased toward the skin depth. The experimental results indicate that high-efficiency extraordinary terahertz transmission can be achieved at an array thickness of only one third of skin depth.
© 2005 Optical Society of America
Full Article | PDF ArticleMore Like This
Xiang Shou, Amit Agrawal, and Ajay Nahata
Opt. Express 13(24) 9834-9840 (2005)
Dongxia Qu, D. Grischkowsky, and Weili Zhang
Opt. Lett. 29(8) 896-898 (2004)
Jingbo Wu, Hao Dai, Hao Wang, Biaobing Jin, Tao Jia, Caihong Zhang, Chunhai Cao, Jian Chen, Lin Kang, Weiwei Xu, and Peiheng Wu
Opt. Express 19(2) 1101-1106 (2011)