Super-collimation and negative refraction in hyperbolic Van der Waals superlattices

• Main Authors: Sreekanth, Kandammathe Valiyaveedu, Simpson, Robert E.
• 其他作者: School of Physical and Mathematical Sciences
• 格式: Article
• 語言: English
• 出版: 2020
• 主題: Science::Physics; Hyperbolic Metamaterials; THz Frequencies
• 在線閱讀: https://hdl.handle.net/10356/143027
• 機構: Nanyang Technological University

In this paper, we investigate supercollimation and negative group refraction properties of Van der Waals crystals. Van der Waals crystals, such as Bi 2 Se 3 , show both type I and type II hyperbolic dispersion at terahertz (THz) frequencies. An all angle negative group index of refraction is observe...