Abstract
Negative-index metamaterials are significantly limited by their inherent losses. We demonstrate that a negative index without dissipative and reflective losses can be achieved in subwavelength dielectric cuboid arrays. We can avoid reflection by making dielectric cuboids exhibit the resonant forward scattering of light, while dissipative loss is inherently absent in dielectric materials. A joint study combining theoretical and experimental research demonstrates that loss-free negative-index metamaterials can be realized. They fulfill the criteria of negative refraction based on causality, while conventional active loss compensation schemes lead to the disappearance of negative refraction by causality.
| Original language | English |
|---|---|
| Pages (from-to) | 1370-1374 |
| Number of pages | 5 |
| Journal | ACS Photonics |
| Volume | 5 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2018 Apr 18 |
Bibliographical note
Funding Information:This work was supported by the Center for Advanced Meta-Materials (CAMM) funded by the Ministry of Science, ICT and Future Planning as a Global Frontier Project (CAMM-2014M3A6B3063710). SeokJae Yoo was also supported by a Korea University Grant, and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2017R1A6A3A11034238).
Publisher Copyright:
© 2018 American Chemical Society.
Keywords
- effective medium theory
- metamaterials
- optical resonators
- reflection
- refraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biotechnology
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering