Resonant enhancement of second-harmonic generation in the mid-infrared using localized surface phonon polaritons in subdiffractional nanostructures
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
We report on the strong enhancement of mid-infrared second-harmonic generation (SHG) from SiC nanopillars due to the resonant excitation of localized surface phonon polaritons within the Reststrahlen band. A strong dependence of the SHG enhancement upon the optical mode distribution was observed. One such mode, the monopole, exhibits an enhancement that is beyond what is anticipated from field localization and dispersion of the linear and nonlinear SiC optical properties. Comparing the results for the identical nanostructures made of 4H and 6H SiC polytypes, we demonstrate the interplay of localized surface phonon polaritons with zone-folded weak phonon modes of the anisotropic crystal. Tuning the monopole mode in and out of the region where the zone-folded phonon is excited in 6H-SiC, we observe a further prominent increase of the already enhanced SHG output when the two modes are coupled. Envisioning this interplay as one of the showcase features of mid-infrared nonlinear nanophononics, we discuss its prospects for the effective engineering of nonlinear-optical materials with desired properties in the infrared spectral range.
Date Issued
2016-10-21
Date Acceptance
2016-09-26
Citation
Nano Letters, 2016, 16 (11), pp.6954-6959
ISSN
1530-6984
Publisher
American Chemical Society
Start Page
6954
End Page
6959
Journal / Book Title
Nano Letters
Volume
16
Issue
11
Copyright Statement
© 2016 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.nanolett.6b03014.
Sponsor
The Royal Society
The Leverhulme Trust
Engineering & Physical Science Research Council (E
Office Of Naval Research (USA)
Office Of Naval Research Global
Grant Number
WM110079
RPG-2014-018
EP/M013812/1
N00014-16-1-2288
N62909-16-1-2204
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
Nonlinear optics
nanophononics
surface phonon polaritons
polar dielectrics
second harmonic generation
NATURAL HYPERBOLIC MATERIAL
HEXAGONAL BORON-NITRIDE
SCIENCE-AND-TECHNOLOGY
INFRARED REFLECTIVITY
SUBWAVELENGTH OPTICS
SIC POLYTYPES
LIGHT
PLASMONICS
EMISSION
MATTER
MD Multidisciplinary
Publication Status
Published