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

• المؤلفون الرئيسيون: Sreekanth, Kandammathe Valiyaveedu, Simpson, Robert E.
• مؤلفون آخرون: School of Physical and Mathematical Sciences
• التنسيق: مقال
• اللغة: English
• منشور في: 2020
• الموضوعات: Science::Physics; Hyperbolic Metamaterials; THz Frequencies
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/143027
• المؤسسة: 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...