Open AccessExperimental quantification of surface optical nonlinearity in GaP nanopillar waveguides
Author(s) -
Reza Sanatinia,
Srinivasan Anand,
Marcin Świłło
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.000756
Subject(s) - nanopillar , optics , nanophotonics , materials science , nonlinear system , nonlinear optics , optoelectronics , surface (topology) , polarization (electrochemistry) , physics , nanostructure , nanotechnology , laser , chemistry , geometry , mathematics , quantum mechanics
We report on surface second-order optical nonlinearity in single GaP nanopillars (nanowaveguides). The relative contribution of optical nonlinearity from the surface and the bulk is resolved by mode confinement analysis and polarization measurements. By investigating the thickness of nonlinear region at the surface of nanopillars, we estimated the nonlinear coefficient to be ~15 times higher at the surface with respect to the bulk. The presented results are interesting both from the fundamental aspects of light-matter interaction and for future nonlinear nanophotonic devices with smaller footprint.