Probing hyperbolic polaritons using infrared attenuated total reflectance micro-spectroscopy

作     者：Folland, Thomas G. Maß, Tobias W.W. Matson, Joseph R. Ryan Nolen, J. Liu, Song Watanabe, Kenji Taniguchi, Takashi Edgar, James H. Taubner, Thomas Caldwell, Joshua D. 

作者机构：Department of Mechanical Engineering Vanderbilt University NashvilleTN37212 United States  RWTH Aachen University Aachen52056 Germany Interdisciplinary Materials Science Program Vanderbilt University NashvilleTN37212 Department of Chemical Engineering Kansas State University ManhattanKS66506 United States National Institute for Materials Science Tsukuba Japan 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2018年

核心收录：

主　　题：Photons 

摘      要：Hyperbolic polariton modes are highly appealing for a broad range of applications in nanophotonics, including surfaced enhanced sensing, sub-diffractional imaging and reconfigurable metasurfaces. The existence of this type of mode depends on extreme anisotropy in the optical properties of a natural or artificial material. However, due to their high in-plane momentum (short polariton wavelength), these hyperbolic polaritons cannot be launched by light propagating in free space. Here we show that attenuated total reflectance micro-spectroscopy (ATR) using standard spectroscopic tools can launch hyperbolic polaritons in a Kretschmann-Raether configuration. We measure multiple hyperbolic and dielectric modes within the naturally hyperbolic material hexagonal boron nitride as a function of different isotopic enrichments and flake thickness. This overcomes the technical challenges of measurement approaches based on nanostructuring, or scattering scanning nearfield optical microscopy. Ultimately, our ATR approach allows us to compare the optical properties of small-scale materials prepared by different techniques systematically. Copyright © 2018, The Authors. All rights reserved.