Nmie: Extinction, Scattering and Absorption efficiencies of multilayer nanoparticles

Posted on Tue 11 May 2010 in Plasmonics • Tagged with electromagnetism, Free Software, Nanohub.org, Plasmonics, DDSCAT

nmie tool on Nanohub.org. This tool calculates the extinction, scattering, and absorption efficiencies of single nanoparticle (1 layer),core-shell nanoparticle (2 layer) and nanomatryushka nanoparticle (3 layer) using MIE formulation.

Since 2009, I have been a regular user of Nanohub.org. www.Nanohub.orgis a website that provides …


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WINSPALL software for surface plasmon resonance experiments

Posted on Wed 10 March 2010 in Plasmonics • Tagged with electromagnetism, Free Software, photonics, Plasmonics

One needs to fit the reflectivity curves obtained in surface plasmon resonance experiments with theoretical models. A free software (for non commercial use) called Winspall exactly does that.

According to the developers, WINSPALL is a PC based software which computes the reflectivity of optical multilayer systems. It is based on …


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Radiation from an oscillating dipole

Posted on Thu 14 January 2010 in Plasmonics • Tagged with electromagnetism, Matlab, Plasmonics

The electric field from an oscillating dipole is given by:, where [tex]\hat{r}[/tex] is the position vector, [tex] \omega [/tex] is the frequency of dipole oscillation, [tex]\textbf{p}[/tex] is the dipole moment. The two terms in the electric field consists of 1) near field (area near …


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Resources on Electromagnetics/Plasmonics/Nanophotonics

Posted on Tue 12 January 2010 in Plasmonics • Tagged with books, electromagnetism, FDTD, Free Software, Nanohub.org, photonics, Plasmonics

These are some resources on Electromagnetics/plasmonics/nanophotonics

I will maintain a list of free resources on electromagnetics, plasmonics, nanophotonics, optics and other related topics here. If any of you (readers) know any other free resources related to this topic, please let me know and I can add into these …


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Surface Plasmons (SP's)

Posted on Fri 08 January 2010 in Plasmonics • Tagged with animation, Plasmonics

[caption id="attachment_263" align="aligncenter" width="300"] Propagation of surface plasmons[/caption]

Surface plasmons (SP's) are electromagnetic waves that propagate at the interface between metals (such as Ag, Au ) and dielectric material. Here I have simulated the propagation of surface plasmons on Ag-air interface, the color indicates the magnitude of …


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Plasmonic coupling of electromagnetic energy in hexagonal array of silver nanorods

Posted on Fri 08 January 2010 in Plasmonics • Tagged with FDTD, MEEP, Plasmonics

A cool animation which I reproduced from W.M Saj, Optics Express, Vol 13, 13, 2005 using freely obtained FDTD software (MEEP). It demonstrates the propagation of electromagnetic energy in hexagonal array of silver nanorods due to plasmonic coupling. The source is offset from the center and the energy is …


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