TY - JOUR
T1 - Plasmon dephasing and macroscopic polarization conversion in single nanoporous particles
AU - Khan, Pritam
AU - Brennan, Grace
AU - Tofail, Syed A.M.
AU - Liu, Ning
AU - Silien, Christophe
N1 - Publisher Copyright:
© 2021 META Conference. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Plasmon damping strongly affects their temporal and spectral behaviour and determines their ability to enhance the characteristics of metamaterials tailored to a wide range of applications, including electric-field enhancement, hotelectron injection, and sensing. Coupled and mesoscopic plasmonic systems having complex spectra generally impede damping analysis. As such, we report that polarimetric dark-field microscopy with an incident circular polarized laser is sensitive to the plasmon dephasing and also unambiguously records the change in damping induced upon adsorption of molecules. We validate the relationship with finite element analysis and experiments on gold nanoparticles and silvered nanoporous silica particles. Remarkably, after molecular adsorption, the nanostructured particles scatter with a polarization plane rotated by 90 degrees, when analyzed with a quarter-wave plate and linear polarizer together. These results offer new perspectives in molecule sensing and materials tunability for light polarization conversion at sub-microscopic scale.
AB - Plasmon damping strongly affects their temporal and spectral behaviour and determines their ability to enhance the characteristics of metamaterials tailored to a wide range of applications, including electric-field enhancement, hotelectron injection, and sensing. Coupled and mesoscopic plasmonic systems having complex spectra generally impede damping analysis. As such, we report that polarimetric dark-field microscopy with an incident circular polarized laser is sensitive to the plasmon dephasing and also unambiguously records the change in damping induced upon adsorption of molecules. We validate the relationship with finite element analysis and experiments on gold nanoparticles and silvered nanoporous silica particles. Remarkably, after molecular adsorption, the nanostructured particles scatter with a polarization plane rotated by 90 degrees, when analyzed with a quarter-wave plate and linear polarizer together. These results offer new perspectives in molecule sensing and materials tunability for light polarization conversion at sub-microscopic scale.
UR - http://www.scopus.com/inward/record.url?scp=85172453343&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85172453343
SN - 2429-1390
SP - 260
EP - 261
JO - International Conference on Metamaterials, Photonic Crystals and Plasmonics
JF - International Conference on Metamaterials, Photonic Crystals and Plasmonics
T2 - 11th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2021
Y2 - 20 July 2021 through 23 July 2021
ER -