Imperial College London
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ProfessorAlexeiKornyshev

Faculty of Natural Sciences, Department of Chemistry

Professor of Chemical Physics
 
 
 
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Contact

 

+44 (0)20 7594 5786a.kornyshev Website CV

 
 
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Assistant

 

Mr John Murrell +44 (0)20 7594 2845

 
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Location

 

110Molecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kornyshev:2019,
author = {Kornyshev, A and Sikdar, D and Weir, H},
journal = {Optics Express},
pages = {26483--26498},
title = {Optical response of electro-tuneable 3D superstructures of plasmonic nanoparticles self-assembling on transparent columnar electrodes},
url = {https://www.imperial.ac.uk/people/a.kornyshev},
volume = {19},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Electrically tuneable, guided self-assembly of plasmonic nanoparticles (NPs) at polarized, patterned solid–liquid interfaces could enable numerous platforms for designing nanoplasmonic optical devices with new tuneable functionalities. Here, we propose a unique design of voltage-controlled guided 3D self-assembly of plasmonic NPs on transparent electrodes, patterned as columnar structures — arrays of vertical nanorods. NP assembly on the electrified surfaces of those columnar structures allows formation of a 3D superstructure of NPs, comprising stacking up of NPs in the voids between the columns, forming multiple NP-layers. A comprehensive theoretical model, based on quasi-static effective medium theory and multilayer Fresnel reflection scheme, is developed and verified against full-wave simulations for obtaining optical responses — reflectance, transmittance, and absorbance — from such systems of 3D self-assembled NPs. With a specific example of small gold nanospheres, self-assembling on polarized zinc oxide columns, we show that the reflectance spectrum can be controlled by the number of stacked NP-layers. Numerical simulations show that peak reflectance can be enhanced up to ~1.7 times, along with spectral broadening by a factor of ~2 — allowing wide range tuning of optical reflectivity. Smaller NPs with superior mobility would be preferable over large NPs for realizing such devices for novel photonic and sensing applications.
AU  - Kornyshev,A
AU  - Sikdar,D
AU  - Weir,H
EP  - 26498
PY  - 2019///
SN  - 1094-4087
SP  - 26483
TI  - Optical response of electro-tuneable 3D superstructures of plasmonic nanoparticles self-assembling on transparent columnar electrodes
T2  - Optics Express
UR  - https://www.imperial.ac.uk/people/a.kornyshev
UR  - https://www.osapublishing.org/oe/abstract.cfm?uri=oe-27-19-26483
UR  - http://hdl.handle.net/10044/1/73027
VL  - 19
ER  -
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