In this section
@article{Grinblat:2016:10.1021/acs.nanolett.6b01958,
author = {Grinblat, G and Li, Y and Nielsen, MP and Oulton, R and Maier, SA},
doi = {10.1021/acs.nanolett.6b01958},
journal = {Nano Letters},
pages = {4635--4640},
title = {Enhanced third harmonic generation in single Germanium nanodisks excited at the anapole mode},
url = {http://dx.doi.org/10.1021/acs.nanolett.6b01958},
volume = {16},
year = {2016}
}
TY - JOUR
AB - We present an all-dielectric germanium nanosystem exhibiting a strong third ordernonlinear response and efficient third harmonic generation in the optical regime. A thin germaniumnanodisk shows a pronounced valley in its scattering cross section close to the dark anapole mode,while the electric field energy inside the disk is maximized due to high confinement within thedielectric. We investigate the dependence of the third harmonic signal on disk size and pumpwavelength to reveal the nature of the anapole mode. Each germanium nanodisk generates a higheffective third order susceptibility of (3) = 4.3 10−9 , corresponding to an associated thirdharmonic conversion efficiency of 0.0001% at a wavelength of 1650 nm, which is four orders ofmagnitude greater than the case of an unstructured germanium reference film. Furthermore, thenonlinear conversion via the anapole mode outperforms that via the radiative dipolar resonancesby about one order of magnitude, which is consistent with our numerical simulations. Thesefindings open new possibilities for the optimization of upconversion processes on the nanoscalethrough the appropriate engineering of suitable dielectric materials.
AU - Grinblat,G
AU - Li,Y
AU - Nielsen,MP
AU - Oulton,R
AU - Maier,SA
DO - 10.1021/acs.nanolett.6b01958
EP - 4640
PY - 2016///
SN - 1530-6992
SP - 4635
TI - Enhanced third harmonic generation in single Germanium nanodisks excited at the anapole mode
T2 - Nano Letters
UR - http://dx.doi.org/10.1021/acs.nanolett.6b01958
UR - http://hdl.handle.net/10044/1/34030
VL - 16
ER -