Relative efficiency of polariton emission in two-dimensional materials
Abstract
We investigated emission and propagation of polaritons in a two dimensional van der Waals material hexagonal boron nitride (hBN). Our specific emphasis in this work is on hyperbolic phonon polariton emission that we investigated by means of scattering-type scanning near-field optical microscopy. Real-space nano-images detail how the polaritons are launched in several common arrangements including: light scattering by the edges of the crystal, metallic nanostructures deposited on the surface of hBN crystals, as well as random defects and impurities. Notably, the scanned tip of the near-field microscope is itself an efficient polariton launcher. Our analysis reveals that the scanning tips are superior to other types of emitters we have investigated. Furthermore, the study of polariton emission and emission efficiency may provide insights for development of polaritonic devices and for fundamental studies of collective modes in other van der Waals materials.
Keywords
Cite
@article{arxiv.1704.05618,
title = {Relative efficiency of polariton emission in two-dimensional materials},
author = {Siyuan Dai and Qiong Ma and Yafang Yang and Jeremy Rosenfeld and Michael D. Goldflam and Alex McLeod and Zhiyuan Sun and Trond I. Andersen and Zhe Fei and Mengkun Liu and Yinming Shao and Kenji Watanabe and Takashi Taniguchi and Mark Thiemens and Fritz Keilmann and Pablo Jarillo-Herrero and Michael M. Fogler and D. N. Basov},
journal= {arXiv preprint arXiv:1704.05618},
year = {2017}
}
Comments
19 pages, 3 figures