Imperial College London

Professor Joshua B. Edel

Faculty of Natural SciencesDepartment of Chemistry

Professor of Biosensing & Analytical Sciences
 
 
 
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Contact

 

+44 (0)20 7594 0754joshua.edel Website

 
 
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Assistant

 

Mr John Murrell +44 (0)20 7594 2845

 
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Location

 

442AChemistrySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sikdar:2016:10.1039/c6cp04551k,
author = {Sikdar, D and Hasan, SB and Urbakh, M and Edel, JB and Kornyshev, AA},
doi = {10.1039/c6cp04551k},
journal = {Physical Chemistry Chemical Physics},
pages = {20486--20498},
title = {Unravelling the optical responses of nanoplasmonic mirror-on-mirror metamaterials.},
url = {http://dx.doi.org/10.1039/c6cp04551k},
volume = {18},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Mirror-on-mirror platforms based on arrays of metallic nanoparticles, arranged top-down or self-assembled on a thin metallic film, have interesting optical properties. Interaction of localized surface-plasmons in nanoparticles with propagating surface-plasmons in the film underpins the exotic features of such platforms. Here, we present a comprehensive theoretical framework which emulates such a system using a five-layer-stack model and calculate its reflectance, transmittance, and absorbance spectra. The theory rests on dipolar quasi-static approximations incorporating image-forces and effective medium theory. Systematically tested against full-wave simulations, this simple approach proves to be adequate within its obvious applicability limits. It is used to study optical signals as a function of nanoparticle dimensions, interparticle separation, metal film thickness, the gap between the film and nanoparticles, and incident light characteristics. Several peculiar features are found, e.g., quenching of reflectivity in certain frequency domains or shift of the reflectivity spectra. Schemes are proposed to tailor those as functions of the mentioned parameters. Calculating the system's optical responses in seconds, as compared to much longer running simulations, this theory helps to momentarily unravel the role of each system parameter in light reflection, transmission, and absorption, facilitating thereby the design and optimisation of novel mirror-on-mirror systems.
AU - Sikdar,D
AU - Hasan,SB
AU - Urbakh,M
AU - Edel,JB
AU - Kornyshev,AA
DO - 10.1039/c6cp04551k
EP - 20498
PY - 2016///
SN - 1463-9084
SP - 20486
TI - Unravelling the optical responses of nanoplasmonic mirror-on-mirror metamaterials.
T2 - Physical Chemistry Chemical Physics
UR - http://dx.doi.org/10.1039/c6cp04551k
UR - http://hdl.handle.net/10044/1/41560
VL - 18
ER -