Open AccessNanoscale displacement sensing based on the interaction of a Gaussian beam with dielectric nano-dimer antennas
Author(s) -
Yong Wang,
Yonghua Lü,
Pei Wang
Publication year - 2018
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.26.001000
Subject(s) - gaussian beam , optics , near and far field , scattering , dielectric , nanometrology , physics , displacement (psychology) , light scattering , beam (structure) , gaussian , materials science , optoelectronics , psychology , quantum mechanics , psychotherapist , metrology
Measuring nanoscale displacement is crucial for optical nanometrology and optical calibration. Here, we present a comprehensive analysis of the far-field scattering of dielectric nano-dimer antennas excited precisely by a Gaussian beam. We demonstrated that the interaction of a Gaussian beam with a dielectric nanoantenna will lead to remarkable sensitivity of the far-field scattering to the displacement at a scale much smaller than the wavelength. The electric/magnetic dipole-dipole interaction model is drawn to analyze the far-field scattering and the results are in good agreement with numerical simulations. This study will pave a simple way to a novel position detection and displacement sensing based on the interaction of general Gaussian beam with nanoantennas.