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Plasmonic Resonance of Gold Nanoparticle

Posted Mar 11, 2015, 7:18 p.m. EDT RF & Microwave Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions, Results & Visualization Version 5.0, Version 5.2 6 Replies

Ryan Freeman
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Hi all, I'm trying to model the plasmonic response of a gold nanoparticle in the presence of an electric field. I've got a model of a Au nanoparticle in a circular domain surrounded by PML layer and I've defined the background electric field, as well as Gold's dielectric permittivity as a function of wavelength.

At first glance, the model works, I get scattering and absorption cross sections that show a peak at ~520nm. However, the peak does not change position as the size of the nanoparticle is changed, as predicted by Mie Theory.

Are there any common mistakes that could lead to such a strange results?

I've attached the spectrum for three different sizes and the model.

Thanks!
6 Replies Last Post Apr 12, 2017, 2:52 p.m. EDT
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Yuhua Yang
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Posted: 8 years ago Aug 11, 2016, 11:38 a.m. EDT
Hi,

I am also to do Plasmonic Resonance of Gold Nanoparticle.
But I can not do the 200nm gold nanoball, can you share your model.
I used the RF model in 5.2. I find a example `` Optical Scattering Off a Gold Nanosphere in 5.2``.
but I use the Gaussion beam as back ground field. I font the relsistive losses in not a shell.

Hi, I am also to do Plasmonic Resonance of Gold Nanoparticle. But I can not do the 200nm gold nanoball, can you share your model. I used the RF model in 5.2. I find a example `` Optical Scattering Off a Gold Nanosphere in 5.2``. but I use the Gaussion beam as back ground field. I font the relsistive losses in not a shell.
Ryan Freeman
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Posted: 8 years ago Aug 11, 2016, 2:29 p.m. EDT
It's been a while since I've looked at these simulations, but I've attached 3 files that may be helpful.

I modeled the sphere simply as a starting point, and then did most of my work on a different geometry, so most of the files I have are for other geometries.

I can't promise that these .mph files will work properly, but maybe they can be of help.
It's been a while since I've looked at these simulations, but I've attached 3 files that may be helpful. I modeled the sphere simply as a starting point, and then did most of my work on a different geometry, so most of the files I have are for other geometries. I can't promise that these .mph files will work properly, but maybe they can be of help.
HongB Xin
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Posted: 8 years ago Feb 20, 2017, 1:50 a.m. EST
Hi Ryan,

Can you simulate plasmonic resonance now?

I'm learning about it, and saw your discussion, could you please send me a basic example to simulate SPR on a AuNP?

Thank you so much!
Hi Ryan, Can you simulate plasmonic resonance now? I'm learning about it, and saw your discussion, could you please send me a basic example to simulate SPR on a AuNP? Thank you so much!
Ryan Freeman
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Posted: 8 years ago Feb 21, 2017, 10:41 a.m. EST
I haven't worked on the project in about a year I think...but I did make some progress while I was working.

Eventually, I got the simulations mostly working, but the spectra still looked a little odd (noisy and displaying some unphysical peaks). I attest most of the issues to under-meshing, but maybe there's some subtleties that I ignored.

Here's a basic simulation of a Silver nanoparticle. I couldn't find anything with Au nanoparticles.
I haven't worked on the project in about a year I think...but I did make some progress while I was working. Eventually, I got the simulations mostly working, but the spectra still looked a little odd (noisy and displaying some unphysical peaks). I attest most of the issues to under-meshing, but maybe there's some subtleties that I ignored. Here's a basic simulation of a Silver nanoparticle. I couldn't find anything with Au nanoparticles.
Kaleem Ullah
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Posted: 8 years ago Apr 12, 2017, 1:23 a.m. EDT
Hello Ryan,

Thank you very much for providing help. Can you please help me in simulating the multipoles decomposition for a Cu2O particle of radius 450 nm on Silicon and glass substrate???
Your help will be really appreciated.

Thanks
Hello Ryan, Thank you very much for providing help. Can you please help me in simulating the multipoles decomposition for a Cu2O particle of radius 450 nm on Silicon and glass substrate??? Your help will be really appreciated. Thanks
Ryan Freeman
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Posted: 8 years ago Apr 12, 2017, 2:52 p.m. EDT
I'm sorry, I can't offer any advice and don't have time to do any more simulations.
I'm sorry, I can't offer any advice and don't have time to do any more simulations.

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