Aspect-ratio driven evolution of high-order resonant modes and near-field distributions in localized surface phonon polariton nanostructures

Published

September 13, 2016

Author(s)

Joseph G. Tischler, Chase T. Ellis, Orest Glembocki, Francisco Bezares, Alexander Giles, Richard Kasica, Loretta Shirley, Jeffrey C. Owrutsky, Dmitry Chigrin, Joshua Caldwell

Abstract

Polar dielectrics have garnered much attention as an alternative to plasmonic metals in the mid- to long-wave infrared spectral regime due to their low optical losses. As such, nanoscale resonators composed of these materials demonstrate figures of merit beyond those achievable in plasmonic equivalents. However, until now, only low-order, phonon-mediated, localized polariton resonances, known as surface phonon polaritons (SPhPs), have been observed in polar dielectric optical resonators. In the present work, we investigate the excitation of 16 distinct high-order, multipolar, localized surface phonon polariton resonances that are optically excited in rectangular pillars etched into a semi-insulating silicon carbide substrate. By elongating a single pillar axis we are able to significantly modify the far- and near-field properties of localized SPhP resonances, opening the door to realizing narrow-band infrared sources with tailored radiation patterns. Such control of the near-field behavior of resonances can also impact surface enhanced infrared optical sensing, which is mediated by polarization selection rules, as well as the morphology and strength of resonator hot spots. Furthermore, through the careful choice of polar dielectric material, these results can also serve as the guiding principles for the generalized design of optical devices that operate from the mid- to far-infrared.

Citation

Scientific Reports

Volume

6

Pub Type

Journals

Download Paper

https://doi.org/10.1038/srep32959

Local Download

Keywords

plasmonics, surface phonon polaritons, metamaterials, nanophotonics, plasmonics

Citation

Tischler, J. , Ellis, C. , Glembocki, O. , Bezares, F. , Giles, A. , Kasica, R. , Shirley, L. , Owrutsky, J. , Chigrin, D. and CALDWELL, J. (2016), Aspect-ratio driven evolution of high-order resonant modes and near-field distributions in localized surface phonon polariton nanostructures, Scientific Reports, [online], https://doi.org/10.1038/srep32959, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=922445 (Accessed September 11, 2024)