Abstract-Terahertz Waves: Perfect Extinction of Terahertz Waves in Monolayer Graphene over 2-nm-Wide Metallic Apertures

1. Hyeong-Ryeol Park¹, 
2. Seon Namgung¹,
3. Xiaoshu Chen¹, 
4. Nathan C. Lindquist²,
5. Vincenzo Giannini³, 
6. Yan Francescato³,
7. Stefan A. Maier³ and
8. Sang-Hyun Oh^1,*

Article first published online: 12 MAY 2015

DOI: 10.1002/adom.201570031

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

http://onlinelibrary.wiley.com/doi/10.1002/adom.201570031/abstract

For enhanced light–matter interactions with 2D materials, ultra-small metallic nanogaps can be utilized. As shown in the image from S.-H. Oh and co-workers, light incident from below is strongly confined within these annular gaps and efficiently funneled through for extraordinarily large transmission. On page 667, by placing monolayer graphene at the exit of these gaps (the right side is covered with graphene), this enhanced transmission is blocked since the graphene absorbs 99% of the strongly confined waves.